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1. Trainingwell supported · human dataAdded 6 August 2026

   Red light therapy adds no clear strength gain

   Pooling five randomised trials in older adults (74 doing photobiomodulation plus resistance training, 72 doing sham), adding light therapy to periodised lifting did not significantly improve maximal strength (SMD 0.26, 95% CI -0.08 to 0.59; p = 0.14). A small benefit could not be ruled out.

   ⚠What it shows: Systematic review of 11 RCTs (n = 456), but only five trials with 146 participants in total reported one-repetition maximum and were pooled; devices, wavelengths and dosing varied, and the authors say a small effect cannot be excluded.Meta-analysis · Photobiomodul Photomed Laser Surg

   Full breakdown →One-Rep Max Calculator →Photobiomodulation as an Adjunct to Resistance Training in Older Adults: A Systematic Review and Meta-Analysis. Photobiomodul Photomed Laser Surg 2026
2. Immunitypreliminary · human dataAdded 6 August 2026

   A workout before your jab does not buy protection

   A Cochrane review of six randomised trials with 599 adults found that exercising shortly before an influenza vaccination was neither beneficial nor harmful, with no significant difference in outcomes between people who exercised and those who did not. The one trial reporting actual influenza cases also found no significant difference.

   ⚠What it shows: Cochrane review of six small RCTs (599 adults aged 18-80, study size 46-158), rated low quality: five of six trials had at least four unclear risk-of-bias domains, most measured biochemical rather than participant-centred outcomes, and no trial reported influenza complications.Meta-analysis · Cochrane Database Syst Rev

   Full breakdown →Exercise prior to influenza vaccination for limiting influenza incidence and its related complications in adults. Cochrane Database Syst Rev 2016
3. Trainingwell supported · human dataAdded 6 August 2026

   Exercise adds to bone drugs at the spine

   In a meta-analysis of seven randomised trials in adults with low bone mass, combining exercise with antiresorptive drugs increased lumbar spine bone mineral density significantly more than the drugs alone (SMD 0.55, 95% CI 0.36 to 0.75; p < 0.00001).

   ⚠What it shows: Meta-analysis of seven RCTs in adults with low bone mass; most trials scored 3 on the Jadad quality scale, and the authors call for longer trials with larger samples. Only lumbar spine bone density was measured, not fractures, and not other skeletal sites.Meta-analysis · Osteoporos Int

   Full breakdown →Additive effects of antiresorptive agents and exercise on lumbar spine bone mineral density in adults with low bone mass: a meta-analysis. Osteoporos Int 2014
4. Bones & Jointswell supported · human dataAdded 6 August 2026

   For arthritic knees, strengthening beats balance work

   In a systematic review of ten moderate-to-high quality trials in knee osteoarthritis, quadriceps strengthening reduced pain and improved function, and outperformed proprioceptive training. No one strengthening method beat the others.

   ⚠What it shows: Systematic review of ten trials selected from 1,128 records, synthesised narratively rather than pooled statistically; exercise protocols, comparators and add-on treatments varied widely, and all participants had diagnosed knee osteoarthritis rather than healthy knees.Systematic review · Rheumatol Int

   Full breakdown →Strengthening the quadriceps femoris muscle versus other knee training programs for the treatment of knee osteoarthritis. Rheumatol Int 2019
5. Bones & Jointspreliminary · human dataAdded 6 August 2026

   Pain does not track knee load, review finds

   Pooling 183 studies of people with knee osteoarthritis, walking produced the greatest knee loading and stair ascent the most pain, while sit-to-stand was lowest on both; during walking, higher knee loading was correlated with less pain (r = -0.507).

   ⚠What it shows: Systematic review and meta-analysis of 183 studies, but the loading differences across activities were mostly non-significant apart from sit-to-stand, the populations and methods were highly heterogeneous, and many studies measured only one activity: usually walking. The loading-pain correlation is cross-study association, not cause.Meta-analysis · Clin Biomech (Bristol)

   Full breakdown →Knee loading and joint pain during daily activities in people with knee osteoarthritis: A systematic review and meta-analysis. Clin Biomech (Bristol) 2025
6. Bones & Jointswell supported · human dataAdded 6 August 2026

   Walking and tai chi ease knee osteoarthritis pain

   A meta-analysis of 24 studies (1,972 participants, 71.46% female) found that low-intensity physical activity, Baduanjin, tai chi, walking and general activity, significantly reduced knee osteoarthritis pain (d = -0.65) and stiffness (d = -0.71) and improved physical function (d = -0.58) in middle-aged and older adults.

   ⚠What it shows: Pooled from 24 trials of mixed quality (assessed with the Cochrane risk-of-bias tool) in middle-aged and older adults with knee osteoarthritis, mostly women; exercise trials cannot blind participants, so effect sizes for self-reported pain may be flattered, and the review does not establish which modality is best.Meta-analysis · J Aging Phys Act

   Full breakdown →A Systematic Review and Meta-Analysis of Asian Exercise Techniques and Various Physical Activity Interventions in Middle and Late Adulthood Patients With Knee Osteoarthritis. J Aging Phys Act 2025
7. Supplementswell supported · human dataAdded 6 August 2026

   Vitamin D's cold-fighting effect shrinks in big trials

   A critical review with meta-analysis found that vitamin D's apparent protection against acute respiratory infections was confined to small trials: the summary odds ratio was 0.69 in trials of 25 to fewer than 248 patients but 0.98 in trials of 248 to 16,000 patients (interaction p = 0.0001), with strong evidence of publication bias.

   ⚠What it shows: A meta-analysis of previously published randomised trials, not new experimental data; the acute respiratory infection trials were re-analysed from an earlier pooled dataset, and the analysis splits trials by size, which can be confounded by differences in populations, doses and outcome definitions. It shows the benefit signal is fragile, not that vitamin D is useless for people who are deficient.Meta-analysis · PLoS One

   Full breakdown →Vitamin D, acute respiratory infections, and Covid-19: The curse of small-size randomised trials. A critical review with meta-analysis of randomised trials. PLoS One 2025
8. Women's Healthwell supported · human dataAdded 6 August 2026

   In women, supplements barely added to exercise gains

   A meta-analysis of 14 randomised trials (763 women across reproductive stages) found that adding protein, amino acids or creatine to exercise produced no significant improvement in skeletal muscle mass, appendicular lean mass, fat-free mass, bone mineral content or bone mineral density; only bench press (g = 0.279) and handgrip strength (g = 0.412) improved significantly, with no increase in adverse events.

   ⚠What it shows: Pooled from just 14 RCTs totalling 763 women, lumping together whole proteins, amino acids and creatine monohydrate, very different compounds, so heterogeneity is high and the null may hide effects of specific supplements. The authors note that trials were mostly shorter than 12 months and lacked site-specific bone measurements, and no head-to-head comparisons exist.Meta-analysis · Int J Med Sci

   Full breakdown →Creatine monohydrate guide →Protein Intake Calculator →Nutritional Supplementation Combined with Exercise for Musculoskeletal Health in Women: A Systematic Review and Meta-Analysis Evaluating Proteins, Amino Acids, and Creatine across Reproductive Stages. Int J Med Sci 2026
9. Women's Healthpreliminary · human dataAdded 6 August 2026

   Oestrogen patches for PMS: small benefit, weak evidence

   A Cochrane review of five randomised trials (305 women) found very low quality evidence that continuous oestrogen delivered by patch or implant plus progestogen produced a small to moderate improvement in overall premenstrual syndrome symptom scores (SMD -0.34), while one small crossover trial suggested luteal-phase oral oestrogen was ineffective and might aggravate symptoms.

   ⚠What it shows: Only five RCTs and 305 women in total, with Cochrane rating every comparison very low quality because of attrition bias, imprecision and heterogeneity; the oral luteal-phase finding rests on a single crossover trial of 11 women. No included trial looked beyond 2-8 months, so long-term risks such as endometrial or breast cancer were never assessed.Meta-analysis · Cochrane Database Syst Rev

   Full breakdown →Non-contraceptive oestrogen-containing preparations for controlling symptoms of premenstrual syndrome. Cochrane Database Syst Rev 2017
10. Women's Healthpreliminary · human dataAdded 6 August 2026

    Vaginal laser eased menopause symptoms in pooled trials

    A systematic review and meta-analysis of 11 randomised trials in women with genitourinary syndrome of menopause found that fractional CO2 laser was associated with improved sexual function, including less pain during sexual activity (standardised mean difference 0.51), and better urinary function including less leakage and urinary frequency (standardised mean difference 0.51), but not with improved vaginal epithelium quality.

    ⚠What it shows: Eleven RCTs pooled, but with mixed comparators, sham laser, topical hormonal treatment or a lubricant gel, and only short-term outcomes, so durability is unknown. The authors themselves state the clinical significance of the changes is unclear, and women with any history of cancer or prior laser treatment were excluded.Meta-analysis · Obstet Gynecol

    Full breakdown →Efficacy of Fractionated Carbon Dioxide Laser for the Treatment of Genitourinary Syndrome of Menopause: A Systematic Review and Meta-analysis. Obstet Gynecol 2025
11. Women's Healthpreliminary · human dataAdded 6 August 2026

    Pill and bone density: good evidence only near menopause

    A systematic review of 75 articles graded the evidence as good for a positive effect of oral contraceptives on bone density in perimenopausal women, fair in premenopausal women with hypothalamic oligo- or amenorrhoea, and only limited in healthy premenopausal women; the ideal formulation and duration remain undetermined.

    ⚠What it shows: A narrative systematic review of 75 articles appraised with Oxford levels of evidence rather than a pooled meta-analysis, and now nearly two decades old; the strongest rating applied to perimenopausal women, while evidence in healthy premenopausal women was rated limited, and the authors call for larger randomised trials.Systematic review · Br J Sports Med

    Full breakdown →Effect of oral contraceptives and hormone replacement therapy on bone mineral density in premenopausal and perimenopausal women: a systematic review. Br J Sports Med 2006
12. Trainingwell supported · human dataAdded 6 August 2026

    Active video games build strength and balance in later life

    A meta-analysis of 25 randomised trials in 2,078 healthy older adults found exergaming, training with active video games, improved muscle strength and balance versus conventional therapies, with the biggest mobility gains when training ran at three or more sessions per week.

    ⚠What it shows: Meta-analysis of 25 RCTs (n=2,078, at least 80% female, mean age 71.5 years); effects varied by console, game type and training dosage across numerous subgroup analyses, and generalisability to older men is limited.Meta-analysis · Exp Gerontol

    Full breakdown →Sarcopenia explained →Comparative effects of EXG and conventional therapies on muscle strength and balance in older people: A meta-analysis and meta-regression. Exp Gerontol 2026
13. Metabolic & GLP-1well supported · human dataAdded 6 August 2026

    Glucose monitors modestly lower HbA1c in type 2 diabetes

    In a meta-analysis of 4 randomised trials covering 566 adults with type 2 diabetes in primary care, continuous glucose monitoring cut HbA1c by 0.46% at 6-8 months and 0.33% at 12-14 months versus usual care, and improved device satisfaction, but quality of life did not change.

    ⚠What it shows: Meta-analysis of only 4 multisite RCTs (n=566) in primary care settings; CGM types were mixed (real-time, retrospective and intermittently scanned), and quality of life showed no improvement.Meta-analysis · Sci Diabetes Self Manag Care

    Full breakdown →Insulin sensitivity explained →Metabolic Fitness Index →Does Continuous Glucose Monitoring Improve Glycemic Control and Quality of Life Among Adults With Type 2 Diabetes in Primary Care Settings? A Systematic Review and Meta-Analysis. Sci Diabetes Self Manag Care 2026
14. Women's Healthwell supported · human dataAdded 6 August 2026

    Pregnancy fitness apps lift steps, not harder exercise

    A meta-analysis of 14 randomised trials in 2,101 perinatal women found digital health interventions significantly increased daily step counts and light physical activity (by 13.04 min/day), but did not significantly shift moderate-to-vigorous activity or sedentary time.

    ⚠What it shows: Meta-analysis of 14 RCTs (n=2,101); the step-count effect reached significance only after excluding outliers via sensitivity analysis, and evidence quality was rated moderate for steps and low for light activity.Meta-analysis · Front Public Health

    Full breakdown →Steps to Calories Calculator →Effects of digital health interventions on objectively measured physical activity during the perinatal period: a systematic review and meta-analysis. Front Public Health 2026
15. Metabolic & GLP-1preliminary · human dataAdded 6 August 2026

    HIIT trimmed 24-hour glucose more than steady cardio

    In a meta-analysis of 12 interventional studies with 177 adults with type 2 diabetes, high-intensity interval training lowered 24-hour mean glucose, post-meal glucose and time spent in hyperglycaemia compared with no exercise, and outperformed moderate-intensity continuous training on 24-hour mean glucose and hyperglycaemic time. Effects on glycaemic variability (mean amplitude of glycemic excursions) remained uncertain.

    ⚠What it shows: Systematic review and meta-analysis, but only 12 studies and 177 participants in total, all adults with type 2 diabetes; GRADE certainty was rated very low to low because of methodological limitations and heterogeneity between trials.Meta-analysis · Front Endocrinol (Lausanne)

    Full breakdown →HIIT explained →Metabolic Fitness Index →High-intensity interval training and continuous glucose monitoring-derived glycemic outcomes in adults with type 2 diabetes: a systematic review and meta-analysis. Front Endocrinol (Lausanne) 2026
16. Alcohol & Nicotinepreliminary · human dataAdded 6 August 2026

    Alcohol's stroke risk climbs steeply past light drinking

    Across 17 prospective cohorts of East Asian men, light drinking (up to 20 g/day) was associated with a lower risk of ischaemic stroke (RR 0.85) and lower all-cause mortality (RR 0.83), while intake above 60 g/day was associated with markedly higher haemorrhagic stroke (RR 1.74) and death from any cause (RR 1.32). The relationship was dose-dependent, with risk rising as intake climbed.

    ⚠What it shows: Meta-analysis of 17 prospective cohort studies, but entirely observational and restricted to East Asian men (cohorts ranged from 1322 to 108,461 subjects); data on women were too limited to include. Associations cannot establish cause, and residual confounding can flatter apparent benefits at low intakes.Meta-analysis · Zhonghua Yi Xue Za Zhi

    Full breakdown →All-cause mortality explained →Healthy Lifestyle & Life Expectancy →[Alcohol intake and stroke in Eastern Asian men:a systemic review and meta-analysis of 17 prospective cohort studies]. Zhonghua Yi Xue Za Zhi 2010
17. Tech & Wearableswell supported · human dataAdded 6 August 2026

    Texts nudged blood pressure down in pooled trials

    Pooled across 22 randomised trials, text-message interventions improved medication adherence and reduced systolic blood pressure by 6.12 mmHg and diastolic by 2.66 mmHg, but produced no significant improvement in BMI, LDL, HDL, total cholesterol or HbA1c.

    ⚠What it shows: Meta-analysis of 22 randomised trials, but heterogeneity between studies was extreme for the blood-pressure outcomes (I² of 96% for systolic and 85% for diastolic), populations varied widely, and long-term effects were not established.Meta-analysis · BMC Public Health

    Full breakdown →Heart Age Calculator →Text messages as a tool to improve cardiovascular disease risk factors control: a systematic review and meta-analysis of randomized clinical trials. BMC Public Health 2025
18. Sleeppreliminary · human dataAdded 6 August 2026

    Fenugreek linked to better postpartum sleep scores

    In a triple-blind trial of 60 first-time mothers, a daily 700 mg fenugreek seed extract capsule taken from the first postpartum week until day 60 was associated with better self-reported sleep quality than placebo at days 30 and 60. The two groups' sleep scores already differed significantly before treatment started, so the analysis had to be adjusted for that gap.

    ⚠What it shows: One small trial, n=60 first-time mothers attending health centres in Sabzevar, Iran; the groups differed significantly on sleep scores at baseline (p=0.009), sleep was measured only by self-report questionnaire, and the authors themselves call for objective sleep measurement.Study · Matern Health Neonatol Perinatol

    Full breakdown →The effect of fenugreek oral capsule on the sleep quality of primiparous women in the postpartum period: a triple‑blind randomized controlled trial. Matern Health Neonatol Perinatol 2026
19. Mindpreliminary · human dataAdded 6 August 2026

    Fitness rose, endocannabinoids didn't budge

    A 12-week programme combining physical exercise with internet-delivered CBT improved six-minute walk distance by 81.6 m more than control in 80 adults with mild-to-moderate depression, exceeding the accepted threshold for a clinically meaningful change. None of nine endocannabinoid biomarkers, including anandamide and 2-AG, shifted more in the intervention group than in controls.

    ⚠What it shows: Single randomised trial, 80 adults with mild-to-moderate depression, 12 weeks plus an 8-week follow-up; the primary analysis was on completers, muscular fitness outcomes were exploratory and non-significant, and depression symptom change is not reported in this abstract.Study · Eur Arch Psychiatry Clin Neurosci

    Full breakdown →VO₂max explained →VO2max Calculator →Effects of an internet-based combined exercise and cognitive-behavioral therapy intervention on endocannabinoid system biomarkers and physical fitness in adults with mild-to-moderate depression: a SONRIE randomized controlled trial. Eur Arch Psychiatry Clin Neurosci 2026
20. Women's Healthpreliminary · human dataAdded 6 August 2026

    Menopause may shape exercise's brain benefit

    In a post hoc analysis of a six-month randomised trial in 93 cognitively healthy women aged 20-67, post-menopausal women assigned to aerobic exercise four days a week improved more on executive function than those assigned to stretching and toning, and more than pre-menopausal women.

    ⚠What it shows: Secondary post hoc analysis of one randomised trial, not what it was designed to test: 93 cognitively healthy women aged 20-67 (43% post-menopausal), of whom 76 completed, leaving small subgroups and a real chance of a spurious interaction.Study · J Alzheimers Dis

    Full breakdown →Executive function explained →Heart Rate Zone Calculator →Can menopausal status moderate the effects of aerobic exercise on executive functions? evidence from a randomized controlled trial. J Alzheimers Dis 2026
21. Sleeppreliminary · human dataAdded 6 August 2026

    Sleep advice shifted habits, not measured sleep

    In a three-arm randomised trial of 66 regional and national track and field athletes, written and verbal sleep hygiene advice both significantly improved Sleep Hygiene Index scores compared with a control group, but ten days of actigraphy showed no significant change in objective sleep parameters. The only hint of benefit was a non-significant increase in total sleep time driven by earlier bedtimes.

    ⚠What it shows: One RCT in 66 track and field athletes over a ten-day intervention; the only significant improvement was a self-reported questionnaire score, six objective actigraphy measures did not shift, and the total sleep time trend was not statistically significant.Study · J Sports Med Phys Fitness

    Full breakdown →Optimising Your Sleep Environment →Sleep Calculator →Written vs. verbal sleep hygiene strategies administration in track and field athletes: a randomized controlled trial study. J Sports Med Phys Fitness 2026
22. Metabolic & GLP-1preliminary · human dataAdded 6 August 2026

    Two fasting days a week moved blood pressure and lipids

    Six months of the 5:2 diet was associated with weight loss of -6.3% in overweight or obese adults with type 2 diabetes and -5.0% in those without, alongside improvements in waist circumference, blood pressure, HDL and LDL cholesterol and adiponectin. HDL and adiponectin improvements were still present at the 12-month follow-up in both groups.

    ⚠What it shows: Secondary analysis of a non-randomised six-month controlled trial: 97 recruited, 93 completed and 82 returned at 12 months, and everyone followed the same 5:2 diet with no non-fasting comparison arm, so the changes cannot be separated from weight loss.Clinical trial · Int J Mol Sci

    Full breakdown →Metabolic syndrome explained →Calorie Deficit Calculator →The 5:2 Diet Reduces Risk Factors for Cardiovascular Disease in Subjects with and Without Type 2 Diabetes-A Non-Randomized Controlled Trial. Int J Mol Sci 2026
23. Nutritionpreliminary · human dataAdded 6 August 2026

    16:8 bulk built the same muscle with less fat

    In a 12-week randomised trial, 23 resistance-trained adults bulking on a 16:8 time-restricted eating schedule gained similar fat-free mass, muscle mass and 1RM strength to controls, but significantly less body weight and fat mass. The time-restricted group ate fewer calories, protein and carbohydrate than prescribed, so the smaller fat gain reflects intake falling short of the target surplus rather than meal timing itself.

    ⚠What it shows: Small 12-week RCT in 23 healthy resistance-trained individuals, with body composition measured by single-frequency bioelectrical impedance; the eating-window group failed to hit the prescribed energy surplus, so the fat-mass difference is confounded by lower intake.Study · J Nutr

    Full breakdown →Muscle protein synthesis explained →Protein Intake Calculator →Time-Restricted Eating during a Bulking Phase Is Associated with Reduced Fat Accumulation, while Muscle and Strength Gains Are Maintained: A 12-Wk Randomized Controlled Trial. J Nutr 2026
24. Nutritionpreliminary · human dataAdded 6 August 2026

    Adding a fasting window didn't cut hunger further

    In a 24-week randomised trial of 120 overweight or obese adults with type 2 diabetes, calorie-carbohydrate restriction with or without time-restricted eating significantly reduced hunger and increased satiety compared with control, with no significant difference between the two intervention groups. Binge eating scale scores and objective binge episodes did not differ significantly between any of the groups at any time point.

    ⚠What it shows: One 24-week randomised trial with 120 adults with type 2 diabetes, 40 per group; appetite was rated on subjective scales, participants were not selected for high baseline binge eating scores, and binge outcomes did not move.Study · Appetite

    Full breakdown →Energy balance explained →Calorie Deficit Calculator →Effects of intensive lifestyle interventions with calorie-carbohydrate-restricted diet versus time-restricted eating on appetite and binge eating in type 2 diabetes: A randomized controlled trial. Appetite 2026

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