This week in the science

1. Supplementspreliminary · human dataAdded 23 October 2026

   Amino acids plus lifting boosted strength in older adults, not muscle size

   In older adults with sarcopenia, adding amino acid-based supplements to resistance training improved handgrip strength, walking speed and physical function tests compared with training alone across nine trials with 496 participants, but it did not add measurable muscle mass.

   ⚠What it shows: Promising but far from settled: results pooled from nine trials covering 496 older adults with sarcopenia, and the authors graded the certainty of the evidence low to very low. How much anyone benefits also seemed to depend on their existing protein intake, training frequency and the type of supplement.Meta-analysis · BMC Musculoskelet Disord

   Full breakdown →Sarcopenia explained →Protein Intake Calculator →Combined resistance training and amino acid-based supplementation for sarcopenia in older adults: a systematic review and meta-analysis. BMC Musculoskelet Disord 2026
2. Women's Healthpreliminary · human dataAdded 23 October 2026

   Endometriosis may be a whole-body disease, not just a pelvic one

   Women with endometriosis had notably higher rates of conditions far beyond the pelvis in pooled observational data from 55 studies, including lupus, rheumatoid arthritis, Sjögren's syndrome, asthma, eczema, fibromyalgia, chronic fatigue syndrome and irritable bowel syndrome, strengthening the case that it is a body-wide inflammatory disease.

   ⚠What it shows: These are associations, not proof that endometriosis causes any of these conditions: results pooled from 55 studies that followed women rather than testing anything, and the overall evidence was rated low or very low. Most of the underlying studies carried a high risk of bias, so the strength of these links may be overstated.Review · Autoimmun Rev

   Full breakdown →Inflammation explained →Beyond the pelvis: redefining endometriosis as a systemic inflammatory disorder. A systematic review and meta-analysis. Autoimmun Rev 2026
3. Gut & Microbiomepreliminary · human dataAdded 23 October 2026

   Probiotics nudged depression scores down, modestly

   Probiotic supplements were linked to a modest reduction in depressive symptom severity across nine randomised trials in 460 adults with diagnosed depression, mostly as an add-on to established treatment, though the analysis could not rule out no effect in future settings.

   ⚠What it shows: A modest signal worth watching, not a treatment: results pooled from nine trials in 460 adults with diagnosed depression, and the plausible range of effects in a new setting still included no benefit at all. Evidence on recovery, remission and side effects was too thin to judge.Systematic review · Front Nutr

   Full breakdown →Probiotics explained →Clinical effects of probiotic supplementation on depressive symptom severity in adults with depressive disorders: a systematic review and meta-analysis. Front Nutr 2026
4. Women's Healthpreliminary · human dataAdded 23 October 2026

   'Baby brain' may be more about mood than memory

   Depressive symptoms in pregnancy and after birth were consistently linked to women reporting forgetfulness and poor focus, but across 42 studies the objective tests of memory, attention and cognitive flexibility mostly failed to show matching deficits.

   ⚠What it shows: Treat the mismatch as suggestive rather than settled: a sweep of 42 studies where most captured a single moment in time, measured mood by self-report and rarely assessed anxiety at all. The cognitive tests also varied widely between studies, which is partly why the objective results disagreed with each other.Meta-analysis · Arch Womens Ment Health

   Full breakdown →Executive function explained →The effects of perinatal depression and anxiety on memory, attention, and cognitive flexibility: a systematic review and meta-analysis. Arch Womens Ment Health 2026
5. Cardiowell supported · human dataAdded 23 October 2026

   Statins cut heart events in women without heart disease, but not deaths

   In women with raised cholesterol but no existing heart disease, statins cut the risk of coronary heart disease events by about 22% across six trials, yet showed no proven reduction in deaths from any cause.

   ⚠What it shows: Strong for preventing heart events, inconclusive for lifespan: pooled results from six trials where women without heart disease were randomly assigned statins or not, but deaths were too few to show a survival effect either way. The analysis also dates from 2010, so later trials are not included.Meta-analysis · Prev Cardiol

   Full breakdown →All-cause mortality explained →Heart Age Calculator →Statins for primary prevention of cardiovascular mortality in women: a systematic review and meta-analysis. Prev Cardiol 2010
6. Supplementswell supported · human dataAdded 23 October 2026

   Green coffee extract shaves a few points off blood pressure

   Pooled data from nine randomised trials found that green coffee bean extract produced small but significant reductions in both systolic and diastolic blood pressure, with the clearest effects in people with hypertension, at doses under 400 mg, and over 4 weeks of use.

   ⚠What it shows: Decent evidence for a modest effect: nine trials pooled together and broadly agreeing with each other, but the reductions amount to a few points of pressure and showed up most clearly in people whose blood pressure was already high.Meta-analysis · Phytother Res

   Full breakdown →Blood pressure explained →Heart Age Calculator →The effect of green coffee extract supplementation on blood pressure: A systematic review and meta-analysis of randomized controlled trials. Phytother Res 2019
7. Sleepwell supported · human dataAdded 23 October 2026

   Exercise helps older sleepers stay asleep, not drift off faster

   A meta-analysis of 28 randomised trials found that mind-body and aerobic exercise both improved subjective sleep quality in middle-aged and older adults, increasing total sleep time and reducing time awake after falling asleep, while changes in sleep efficiency and time taken to fall asleep were not statistically significant.

   ⚠What it shows: Solid pooled evidence: 28 trials in middle-aged and older adults point the same way, though much of the benefit was self-rated, and the hoped-for effect on falling asleep faster did not hold up statistically.Meta-analysis · Geriatr Nurs

   Full breakdown →Optimising Your Sleep Environment →Sleep Calculator →The impact of mind-body and aerobic exercises on subjective and objective sleep quality in middle-aged and older adults: A systematic review and meta-analysis of randomized controlled trials. Geriatr Nurs 2026
8. Metabolic & GLP-1well supported · human dataAdded 23 October 2026

   GLP-1 drugs cut kidney failure risk by 16%, not just heart attacks

   Pooled across 11 placebo-controlled trials in 85 373 people, GLP-1 receptor agonists reduced serious kidney events by 18%, kidney failure by 16%, major cardiovascular events by 13% and death from any cause by 12%, with most participants having type 2 diabetes.

   ⚠What it shows: Strong evidence for people with type 2 diabetes: results pooled from 11 large placebo-controlled trials covering 85 373 people. More people on the drugs stopped treatment because of side effects, so the benefits come with real tolerability trade-offs.Meta-analysis · Lancet Diabetes Endocrinol

   Full breakdown →All-cause mortality explained →Heart Age Calculator →Effects of GLP-1 receptor agonists on kidney and cardiovascular disease outcomes: a meta-analysis of randomised controlled trials. Lancet Diabetes Endocrinol 2025
9. Bones & Jointspreliminary · human dataAdded 23 October 2026

   Core control exercises ease back pain sooner, but the edge is gone within a year

   Motor control exercise beat other conservative treatments for chronic low back pain and disability immediately after treatment, and for pain at six months, but the advantage disappeared by 12 and 24 months. It also did not thicken the core muscles any more than other approaches.

   ⚠What it shows: Take the short-term win lightly: pooled results from 18 trials in 1333 people with chronic back pain, and the authors grade the evidence low to very low quality. Beyond six months the advantage largely disappears.Meta-analysis · Eur J Phys Rehabil Med

   Full breakdown →Back Pain →Effectiveness of motor control exercise on non-specific chronic low back pain, disability and core muscle morphological characteristics: a meta-analysis of randomized controlled trials. Eur J Phys Rehabil Med 2021
10. Trainingwell supported · human dataAdded 23 October 2026

    Cardio wins the fat-loss race for women, but no workout reliably added muscle

    Across 43 trials in 2315 women with overweight or obesity, aerobic-based exercise, especially vigorous sessions and high-intensity intervals, produced the biggest reductions in body fat, while no exercise type significantly increased lean mass compared with control.

    ⚠What it shows: Solid pooled evidence: 43 trials and 2315 women, though many exercise types were compared indirectly through a statistical network rather than head to head. Treat the rankings as best estimates with varying confidence, not guarantees.Meta-analysis · BMJ Open

    Full breakdown →HIIT explained →Body Fat Calculator →Effects of different exercise interventions on body composition in women with overweight and obesity: a systematic review and network meta-analysis. BMJ Open 2026
11. Bones & Jointspreliminary · human dataAdded 22 October 2026

    Shockwave therapy eases back pain, but not enough to change what you can do

    Pooled results from nine randomised trials suggest radial shockwave therapy reduces chronic low back pain, but the improvement in day-to-day function fell short of the threshold patients would typically notice.

    ⚠What it shows: Promising but far from settled: results pooled from nine trials showed pain relief, yet the studies disagreed with each other and most only measured people immediately after treatment. Whether the benefit lasts, and whether function genuinely improves, is still unknown.Review · Disabil Rehabil

    Full breakdown →Back Pain →Effects of extracorporeal shockwave therapy on pain intensity and functional disability in chronic low back pain: a systematic review and meta-analysis. Disabil Rehabil 2026
12. Trainingpreliminary · human dataAdded 22 October 2026

    Tai chi style exercises help back pain, but only on top of standard care

    In a network meta-analysis of 43 randomised trials, traditional Chinese exercises such as Yijinjing, Tai Chi, Baduanjin and Wuqinxi reduced chronic low back pain and improved function, but only when added to conventional therapy, and no single style proved superior to another.

    ⚠What it shows: Encouraging but uncertain: results pooled from 43 trials where people were assigned at random, with the certainty of the evidence rated low to moderate. The exercises only clearly helped when added to conventional care, and no style reliably beat another.Study · Complement Ther Med

    Full breakdown →Mind-body therapies explained →Efficacy of traditional chinese exercises on chronic low back pain: A systematic review and network meta-analysis. Complement Ther Med 2026
13. Metabolic & GLP-1well supported · human dataAdded 22 October 2026

    Dodging a diabetes diagnosis did not save lives in big prevention trials

    Across 10 randomised trials in 23,152 people with prediabetes, diet, exercise and drug interventions delayed or prevented diabetes, and lifestyle approaches outperformed medication. Yet over an average of 3.75 years, deaths, cardiovascular deaths and heart attacks did not fall, with stroke the one possible exception.

    ⚠What it shows: Strong on the diabetes question, weaker on the rest: results pooled from 10 trials in 23,152 people, but the trials ran for an average of 3.75 years, which may simply be too short for differences in deaths and heart attacks to show up.Meta-analysis · Eur J Cardiovasc Prev Rehabil

    Full breakdown →Insulin sensitivity explained →Metabolic Fitness Index →Prevention of diabetes and reduction in major cardiovascular events in studies of subjects with prediabetes: meta-analysis of randomised controlled clinical trials. Eur J Cardiovasc Prev Rehabil 2011
14. Trainingwell supported · human dataAdded 22 October 2026

    Gripping hard beat lifting weights for lowering blood pressure

    In a meta-analysis of 28 randomised trials covering 1012 healthy adults, resistance training lowered blood pressure in people with normal or slightly raised readings, and isometric handgrip training cut it by 13.5/6.1 mm Hg, far more than the 2.8/2.7 mm Hg from dynamic weight training.

    ⚠What it shows: Reliable for weight training's modest effect, pooled from 28 trials in 1012 healthy adults. The eye-catching handgrip result comes from just 3 study groups, so that comparison needs confirming before anyone rewrites their routine around it.Meta-analysis · Hypertension

    Full breakdown →Isometric explained →Heart Age Calculator →Impact of resistance training on blood pressure and other cardiovascular risk factors: a meta-analysis of randomized, controlled trials. Hypertension 2011
15. Skin & Glow-uppreliminary · human dataAdded 22 October 2026

    The worse the eczema, the lower the vitamin D

    People with atopic dermatitis had significantly lower vitamin D levels than healthy controls across 20 pooled studies, severe cases had lower levels still, and supplementation was linked to improved symptoms, though causation has not been established.

    ⚠What it shows: A consistent link, not proof of cause: pooled from 20 studies covering 1882 people with the condition, and sunlight, season and local habits could explain part of the picture. Trials directly testing supplements remain few.Meta-analysis · Am J Clin Dermatol

    Full breakdown →Vitamin D explained →Effect of Vitamin D Serum Levels and Supplementation on Atopic Dermatitis: A Systematic Review and Meta-analysis. Am J Clin Dermatol 2022
16. Supplementspreliminary · human dataAdded 22 October 2026

    Black seed oil nudges down an inflammation marker, mainly in people with obesity

    Pooled results from five randomised trials suggest black seed (Nigella sativa) supplementation lowers the inflammation marker C-reactive protein by 0.55 mg/L on average, but the reduction was only significant in people with a BMI of 30 or above.

    ⚠What it shows: Treat this as a tentative signal: only five trials qualified, they disagreed with each other, and the drop only held up in people with a BMI of 30 or more. The authors themselves want bigger, longer trials before calling it settled.Meta-analysis · Complement Ther Med

    Full breakdown →Black seed oil (nigella) guide →The effect of Nigella sativa L. supplementation on serum C-reactive protein: A systematic review and meta-analysis of randomized controlled trials. Complement Ther Med 2019
17. Bones & Jointspreliminary · human dataAdded 22 October 2026

    Moxibustion eased chronic back pain in trials, but couldn't beat core exercises

    Pooled trials suggest moxibustion relieves chronic low back pain better than western medicine and acupuncture, but it showed no advantage over core stability training, and the reviewers graded the evidence very low to low quality.

    ⚠What it shows: Too shaky to act on: ten trials in 987 people pointed moxibustion's way, but most were at high risk of bias and the reviewers graded the whole evidence base very low to low. Even then it showed no edge over core stability training.Meta-analysis · Complement Ther Clin Pract

    Full breakdown →Back Pain →Efficacy and safety of moxibustion for chronic low back pain: A systematic review and meta-analysis of randomized controlled trials. Complement Ther Clin Pract 2020
18. Supplementswell supported · human dataAdded 22 October 2026

    Quercetin failed to move blood sugar, insulin resistance or HbA1c in pooled trials

    Pooled across nine trials, quercetin supplements did not improve fasting glucose, insulin resistance or HbA1c in people with metabolic syndrome and related conditions. Fasting glucose only fell in subgroups using at least 500 mg per day or trials running 8 weeks or longer.

    ⚠What it shows: The headline null is fairly solid: results pooled from nine trials in people with metabolic syndrome and related conditions found no change in any main blood sugar measure. The positive subgroup findings on higher doses and longer trials are weaker evidence, closer to a hypothesis than a verdict.Meta-analysis · Phytother Res

    Full breakdown →Metabolic syndrome explained →Metabolic Fitness Index →Effects of quercetin supplementation on glycemic control among patients with metabolic syndrome and related disorders: A systematic review and meta-analysis of randomized controlled trials. Phytother Res 2019
19. Women's Healthpreliminary · human dataAdded 22 October 2026

    Mineral supplements tied to better insulin control in women with PCOS

    In pooled results from 11 trials of 618 women with PCOS, mineral supplements including magnesium, chromium, zinc and selenium were linked to lower fasting glucose, fasting insulin and insulin resistance, plus reduced total cholesterol and triglycerides. LDL did not change and HDL dipped slightly.

    ⚠What it shows: Encouraging but blurry: results pooled from 11 trials in 618 women mixed several different minerals together, so nobody can say which one does the work or at what dose. The authors themselves call for larger, longer trials before drawing firm conclusions.Meta-analysis · BMC Endocr Disord

    Full breakdown →Insulin sensitivity explained →Effectiveness of mineral supplements (magnesium, chromium, zinc, selenium, chromium picolinate) in reducing insulin resistance in polycystic ovary syndrome: a meta-analysis of randomized controlled trials. BMC Endocr Disord 2026
20. Bones & Jointspreliminary · human dataAdded 21 October 2026

    Yoga, Pilates, tai chi: all ease back pain and none of them wins

    Across 25 randomised trials, mind-body exercises such as yoga, Pilates, tai chi and qigong eased chronic nonspecific low back pain by an average of 1.56 cm on a 10 cm scale. No single practice proved better than another, and no optimal dose emerged.

    ⚠What it shows: Real but wobbly: pain eased across 25 trials where people were assigned at random, yet the studies disagreed with each other so much that in some settings the benefit could be close to nothing. The certainty of the head-to-head comparisons was rated low, so tai chi topping the rankings is a hint, not a verdict.Review · J Pain Res

    Full breakdown →Back Pain →Effects of Mind-Body Exercises on Pain Intensity in Individuals with Chronic Nonspecific Low Back Pain: A Systematic Review and Network Meta-Analysis of Randomized Controlled Trials. J Pain Res 2026
21. Supplementswell supported · human dataAdded 21 October 2026

    Green coffee extract barely moves the scale

    Across 16 randomised trials, green coffee extract reduced BMI by a marginal 0.403 kg/m², while changes in body weight and waist circumference did not reach statistical significance. People with a starting BMI of 25 kg/m² or above saw somewhat larger reductions, and trials shorter than 4 weeks showed no effect.

    ⚠What it shows: Solid enough to deflate the hype: results pooled from 16 trials found only a small dip in BMI and nothing statistically reliable for body weight or waist size. Trials running under 4 weeks showed no effect at all, and the included studies varied in dose and length.Meta-analysis · Phytomedicine

    Full breakdown →Energy balance explained →Calorie Deficit Calculator →The effect of green-coffee extract supplementation on obesity: A systematic review and dose-response meta-analysis of randomized controlled trials. Phytomedicine 2019
22. Cardiowell supported · human dataAdded 21 October 2026

    The humble pedometer beats your smart tracker at getting you walking

    Across 57 randomised trials in 16,355 adults, step-count monitoring increased walking by 1126 steps per day within 4 months and 464 steps per day at 1 year. Simple pedometers outperformed body-worn trackers and smartphone apps, and adding counselling or incentives brought no extra benefit.

    ⚠What it shows: Unusually strong for lifestyle research: results pooled from 57 trials covering 16,355 adults, most of them judged well run. The boost faded over time, from more than a thousand extra daily steps at first to a few hundred by one year.Meta-analysis · Int J Behav Nutr Phys Act

    Full breakdown →Steps to Calories Calculator →The effects of step-count monitoring interventions on physical activity: systematic review and meta-analysis of community-based randomised controlled trials in adults. Int J Behav Nutr Phys Act 2020
23. Gut & Microbiomepreliminary · human dataAdded 21 October 2026

    Protein boosts gut diversity but thins out Bifidobacterium

    Across 18 studies of physically active people, higher protein intake was linked to greater gut bacterial diversity but also to reductions in Bifidobacterium, a group generally regarded as beneficial. The diversity effect was weakest at intakes of 1.5-2.0 g per kg per day, the range many athletes target.

    ⚠What it shows: Intriguing rather than settled: results pooled from 18 studies covering 819 active people, and the effects shifted with age, dose, training type and study length. Nobody yet knows whether these bacterial changes help or harm health or performance.Study · Nutr Rev

    Full breakdown →Gut microbiome explained →Protein Intake Calculator →Effects of Protein Intake on Gut Microbiota in Physically Active Individuals: A Systematic Review and Meta-Analysis. Nutr Rev 2026
24. Metabolic & GLP-1preliminary · human dataAdded 21 October 2026

    Workout timing barely moves metabolic health, bar a small evening edge on blood sugar

    Pooling 12 randomised trials in 879 adults, later-day supervised exercise was associated with a small reduction in fasting blood glucose of 0.16 mmol/L compared with earlier exercise, but timing made no clear difference to HbA1c, fasting insulin, blood lipids, blood pressure, BMI or fat mass.

    ⚠What it shows: The only timing effect found was a small drop in fasting glucose, from results pooled across 12 trials in 879 adults, and the authors rate the evidence as very low to moderate certainty overall. Not yet grounds for rescheduling anything.Review · Public Health

    Full breakdown →Insulin sensitivity explained →Metabolic Fitness Index →Timing of supervised exercise and cardiometabolic risk markers in adults: A systematic review and meta-analysis of randomized controlled trials. Public Health 2026
25. Alcohol & Nicotinewell supported · human dataAdded 21 October 2026

    Moderate drinkers only looked healthier because 'abstainers' included the sick

    A systematic review pooling 87 studies of 3,998,626 people found the apparent survival advantage of low-volume drinkers disappears once former drinkers, who often quit through ill health, are no longer counted as abstainers. After adjustment, light drinking carried no significant mortality benefit over lifetime abstention.

    ⚠What it shows: Strong evidence against the classic drinker's J-curve: results pooled from 87 studies following 3,998,626 people, among whom 367,103 died. The flaw it exposed is that many 'abstainers' were former drinkers who had quit through ill health, which made light drinkers look protective by comparison.Meta-analysis · J Stud Alcohol Drugs

    Full breakdown →All-cause mortality explained →Healthy Lifestyle & Life Expectancy →Do "Moderate" Drinkers Have Reduced Mortality Risk? A Systematic Review and Meta-Analysis of Alcohol Consumption and All-Cause Mortality. J Stud Alcohol Drugs 2016
26. Sleeppreliminary · human dataAdded 21 October 2026

    Exercise improves poor sleep, but past a sweet spot more stops helping

    Pooled results from 23 trials in 1,478 middle-aged and older adults with sleep disorders suggest aerobic, mind-body and combined exercise all improve sleep quality scores, with aerobic exercise showing the largest effect. The benefit traced an inverted U shape, peaking near 539 MET-min per week, and daytime sleepiness did not improve.

    ⚠What it shows: Reasonably solid for the overall pattern: results pooled from 23 trials in 1,478 middle-aged and older adults with sleep problems, though the authors rate certainty as low to moderate. The exact sweet spot is a model's prediction within the doses studied, not a dose anyone tested head to head.Review · J Exerc Sci Fit

    Full breakdown →Sleep Calculator →Comparative effects of exercise modalities on sleep quality in middle-aged and older adults with sleep disorders: A systematic review with pairwise, network, and dose-responsemeta-analyses. J Exerc Sci Fit 2026
27. Longevitypreliminary · human dataAdded 21 October 2026

    Aging muscle still rebuilds its power plants when you train

    A translational review of 28 studies comparing exercised with sedentary aged muscle found training significantly improved VO2max, alongside consistent gains in markers of mitochondrial biogenesis and function, while citrate synthase and BMI did not change significantly.

    ⚠What it shows: The headline fitness gain is solid, pooled from 28 studies that agreed closely with each other. The cellular detail is looser: the evidence mixes human and rodent work that measured different markers, so no training style can be called superior and the mitochondrial story should be read as a direction, not a dose.Review · Arch Gerontol Geriatr

    Full breakdown →VO₂max explained →VO2max Calculator →Exercise training and mitochondrial remodeling in aging skeletal muscle: A translational systematic review and meta-analysis. Arch Gerontol Geriatr 2026
28. Women's Healthpreliminary · human dataAdded 21 October 2026

    SNRIs lead the non-hormonal options for menopausal low mood

    A review of 31 studies in 8,124 peri- and postmenopausal women found SNRIs showed positive effects on depressive symptoms more often than other non-hormonal drug classes, while SSRIs were modest and variable and gabapentinoids helped hot flushes but had limited effects on mood. Evidence for anxiety was inconsistent across all classes.

    ⚠What it shows: Treat this as a lean, not a verdict: a sweep of all the studies covering 8,124 women found the evidence too mixed to combine statistically, with certainty ranging from very low to moderate. No trials pitted the drug classes directly against each other, so the ranking is inferred rather than tested.Systematic review · BMC Psychiatry

    Full breakdown →Efficacy and safety of non-hormonal pharmacotherapies for depressive and anxiety symptoms during the menopausal transition and postmenopause: a systematic review. BMC Psychiatry 2026
29. Women's Healthwell supported · human dataAdded 21 October 2026

    Digital support during pregnancy eased depression symptoms after birth

    A meta-analysis of 18 trials with 9,565 pregnant women found that online interventions delivered during pregnancy modestly reduced postpartum depressive symptoms. Programmes incorporating relaxation and physical activity showed greater efficacy.

    ⚠What it shows: Encouraging but fuzzy: results pooled from 18 trials in 9,565 pregnant women showed a modest average benefit, but the programmes varied so much in content and delivery that nobody can yet say which ingredients matter. Long-term effects were not tracked.Meta-analysis · Arch Womens Ment Health

    Full breakdown →Effect of prenatal online interventions on postpartum depressive symptoms and well-being: a systematic review and meta-analysis. Arch Womens Ment Health 2025
30. Women's Healthwell supported · human dataAdded 20 October 2026

    Osteoporosis affects a third of women after menopause

    Pooled data from 37 studies of 32,366 postmenopausal women put osteoporosis prevalence at 33.87%. Smoking, inactivity, diabetes, a previous fracture and more than 10 years since menopause were all linked with higher odds, while oestrogen replacement therapy was associated with less than half the odds.

    ⚠What it shows: Take the associations seriously but not as proof of cause: results pooled from 37 studies that followed 32,366 postmenopausal women rather than testing anything on them. Most of the cohorts were East Asian, mainly Chinese, so the exact figures may not transfer neatly elsewhere.Meta-analysis · Front Endocrinol (Lausanne)

    Full breakdown →Bone Health →Prevalence and risk factors of postmenopausal osteoporosis: a systematic review and meta-analysis based on multivariate logistic regression. Front Endocrinol (Lausanne) 2026
31. Trainingwell supported · human dataAdded 20 October 2026

    Exercise guards muscle in a hospital bed, less so in orbit

    A meta-analysis of trials in 1754 people found exercise significantly protected muscle strength during hospitalisation and preserved muscle mass during bed rest and spaceflight, although strength and power benefits in spaceflight were small and not significant.

    ⚠What it shows: Reasonably solid on the broad point but messy underneath: results pooled from trials in 1754 people across hospital wards, bed-rest studies and spaceflight, and the studies often disagreed with each other. A stricter reanalysis wiped out the apparent bed-rest strength benefit, so take exact effect sizes with a pinch of salt.Meta-analysis · J Cachexia Sarcopenia Muscle

    Full breakdown →Sarcopenia explained →Disuse-Induced Muscle Atrophy and Muscle Weakness From Hospitalization to Spaceflight: Exercise Succeeds in Prevention and Treatment-A Meta-Analysis. J Cachexia Sarcopenia Muscle 2026
32. Cardiowell supported · human dataAdded 20 October 2026

    Tai chi, not HIIT, has the strongest case for lowering blood pressure

    An umbrella review of 16 meta-analyses in adults with cardiovascular risk factors found strong evidence that aerobic exercise trims waist circumference and that Tai Chi lowers blood pressure, including a systolic drop of 8.80 mmHg after six months or more. HIIT, resistance training, yoga and qigong showed no convincing cardiometabolic benefit.

    ⚠What it shows: About as strong as evidence gets for the aerobic and Tai Chi findings, since this pools results from 16 sets of trials, but it only covers adults who already carried at least one heart risk factor. No convincing evidence for HIIT, resistance, yoga or qigong means unproven here, not disproven.Systematic review · J Diabetes Complications

    Full breakdown →Metabolic syndrome explained →Heart Age Calculator →Effect of different types of exercise interventions on cardiometabolic risk factors: An umbrella review of systematic reviews and meta-analyses. J Diabetes Complications 2026
33. Women's Healthwell supported · human dataAdded 20 October 2026

    More exercise wasn't better against postpartum depression

    Pooled results from 26 trials with 2,867 participants show aerobic exercise reduces postpartum depression scores compared with standard care. The sweet spot was 3 to 4 sessions a week at moderate intensity for 35 to 45 minutes; exercising 5 to 6 times a week ranked below it.

    ⚠What it shows: Credible headline, shakier detail: results pooled from 26 trials in 2,867 women, and the trials disagreed with each other a great deal. The frequency and session-length rankings come from comparing trials against each other rather than head to head, so treat the sweet spot as a best guess rather than a rule.Meta-analysis · PLoS One

    Full breakdown →Effectiveness of aerobic exercise in the prevention and treatment of postpartum depression: Meta-analysis and network meta-analysis. PLoS One 2023
34. Mindwell supported · human dataAdded 20 October 2026

    Virtual reality tops digital fixes for low mood in later life

    A meta-analysis of 32 trials with 3,973 older adults with mild, below-diagnosis depressive symptoms found digital mental health tools modestly improved mood, anxiety and quality of life. Virtual reality programmes stood out as the most effective format in subgroup analysis.

    ⚠What it shows: Decent evidence for a modest average benefit: results pooled from 32 trials in 3,973 older adults whose symptoms fell short of a depression diagnosis. The eye-catching virtual reality figure comes from a smaller slice of those trials, so it is the least settled part of the finding.Meta-analysis · J Affect Disord

    Full breakdown →The effect of eHealth interventions on mental health and quality of life in older adults with subthreshold depression: A systematic review and meta-analysis. J Affect Disord 2026
35. Metabolic & GLP-1well supported · human dataAdded 20 October 2026

    Fasting trimmed weight and waists but left cholesterol and blood sugar untouched

    Pooled results from six randomised trials in people with metabolic syndrome found intermittent fasting reduced body weight by 2.49 kg and waist circumference by 3.06 cm versus non-fasting, and improved insulin resistance, but blood pressure, cholesterol, triglycerides and fasting blood glucose did not change. A small amount of fat free mass was lost alongside the fat.

    ⚠What it shows: Reasonably solid but resting on a thin base: results pooled from only 6 trials in people with metabolic syndrome, and the authors themselves say larger studies are needed to confirm effectiveness and safety. Note that some of the weight lost was lean mass, not just fat.Meta-analysis · Asia Pac J Clin Nutr

    Full breakdown →Metabolic syndrome explained →Calorie Deficit Calculator →Effects of intermittent fasting on cardiometabolic risk factors in patients with metabolic syndrome: A systematic review and meta-analysis of randomized controlled trials. Asia Pac J Clin Nutr 2022
36. Women's Healthnot supported · human dataAdded 20 October 2026

    Fish oil did nothing for insulin resistance in PCOS

    Pooled results from three randomised controlled trials in 145 women with polycystic ovary syndrome found that omega-3 supplements, at 1.2 g to 3.6 g daily for 6 to 8 weeks, did not improve insulin resistance or HOMA-IR compared with placebo.

    ⚠What it shows: A fair null but a thin one: results pooled from just three short trials covering 145 women, with supplements taken for 6 to 8 weeks at most. Larger or longer trials could still shift the picture, but right now the benefit is unproven.Meta-analysis · Diabetes Metab Syndr

    Full breakdown →Insulin sensitivity explained →Effect of omega-3 fatty acids supplementation on insulin resistance in women with polycystic ovary syndrome: Meta-analysis of randomized controlled trials. Diabetes Metab Syndr 2017
37. Mindpreliminary · human dataAdded 20 October 2026

    Believing you've had caffeine boosts performance, even when you haven't

    A meta-analysis of 17 studies found that deceptively giving healthy adults a placebo described as caffeine improved sport performance with a small-to-moderate pooled effect, across outcomes such as bench press, cycling time trials and repeated sprints.

    ⚠What it shows: A real but shaky signal: results pooled from 17 studies in healthy adults, but nine had serious design weaknesses and the rest were unclear, and the authors rate the overall evidence as low quality. The size of the effect should be read loosely.Meta-analysis · J Int Soc Sports Nutr

    Full breakdown →Caffeine guide →Caffeine Half-Life Calculator →Placebo effects of caffeine on sport performance: a systematic review and meta-analysis. J Int Soc Sports Nutr 2026
38. Cardiopreliminary · human dataAdded 20 October 2026

    Pool workouts beat every other exercise for lowering systolic blood pressure

    A Bayesian network meta-analysis of 284 randomised trials covering 18,750 adults with prehypertension or hypertension found aquatic exercise produced the largest average systolic blood pressure reduction, 10.28 mmHg, while mind-body exercise led on diastolic pressure with a 4.69 mmHg reduction.

    ⚠What it shows: Big in size, softer in certainty: results pooled from 284 trials in 18,750 adults, but most exercise types were compared indirectly through modelling rather than head to head. The rankings are best estimates, not race results.Review · Maturitas

    Full breakdown →Isometric explained →Heart Age Calculator →Optimal exercise modalities and doses for blood pressure management in adults with prehypertension and hypertension: A systematic review and Bayesian network meta-analysis. Maturitas 2026
39. Cardiopreliminary · human dataAdded 19 October 2026

    Massage lowered blood pressure by 7.39 mmHg systolic in pooled trials

    Across nine randomised trials, massage was linked to an average 7.39 mmHg greater drop in systolic blood pressure and a 5.04 mmHg greater drop in diastolic pressure than control treatments in people with hypertension or prehypertension.

    ⚠What it shows: Promising but not yet proven: results pooled from nine trials where people were assigned at random, all in adults with high or borderline high blood pressure. The authors themselves say better quality trials are urgently needed before the effect can be confirmed.Meta-analysis · J Cardiovasc Nurs

    Full breakdown →Blood pressure explained →Heart Age Calculator →Effects of Massage on Blood Pressure in Patients With Hypertension and Prehypertension: A Meta-analysis of Randomized Controlled Trials. J Cardiovasc Nurs 2016
40. Recoverypreliminary · human dataAdded 19 October 2026

    Laser light before training left athletes stronger and less sore

    Low-level laser therapy applied before exercise improved lower-limb muscle strength in athletes at 24-hour, 48-hour, 96-hour and 8-week follow-ups, and reduced muscle soreness and blood markers of muscle damage, across 24 pooled studies.

    ⚠What it shows: Encouraging but not settled: results pooled from 24 studies in athletes point the same way, yet the reviewers say a definite therapeutic effect is still not established. They want larger and more rigorous trials before any strong recommendation.Meta-analysis · Sports Health

    Full breakdown →DOMS explained →Recovery Readiness Index →Effects of Low-Level Laser Therapy on Muscular Performance and Soreness Recovery in Athletes: A Meta-analysis of Randomized Controlled Trials. Sports Health 2022

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