Training

1. Trainingpreliminary · human dataAdded 8 August 2026

   Strength classes fill up, but almost nobody checks if people keep lifting

   Across 69 studies of real-life programmes promoting muscle-strengthening exercise in healthy adults, attendance was generally high and 70.0% of the randomised trials improved functional performance, but only nine studies measured whether participants actually took up strength training.

   ⚠What it shows: A systematic review of 69 studies (10 to 3507 participants each, 36 randomised trials) in healthy community-dwelling adults, but 52 studies were rated weak quality and only five strong, and evidence was conflicting for most outcomes beyond function.Systematic review · J Sci Med Sport

   Full breakdown →Training volume explained →Training Volume Calculator →Promotion of muscle-strengthening exercise for public health: a systematic review of real-life interventions in healthy adults. J Sci Med Sport 2026
2. Trainingwell supported · human dataAdded 8 August 2026

   Steady-state cardio won't build muscle, pooled trials suggest

   A meta-analysis of 13 randomised controlled trials found moderate-intensity continuous cardio does not consistently increase muscle size in healthy adults, with a pooled effect close to zero compared with not exercising.

   ⚠What it shows: Meta-analysis of 13 RCTs in healthy adults; pooled effect was near zero but confidence intervals were wide, and the authors flag considerable variability in protocols, populations and measurement sensitivity, so a small effect cannot be fully ruled out.Meta-analysis · Appl Physiol Nutr Metab

   Full breakdown →Hypertrophy explained →Training Volume Calculator →Does moderate-intensity continuous training promote muscle hypertrophy? A systematic review and meta-analysis of randomized controlled trials. Appl Physiol Nutr Metab 2025
3. Trainingwell supported · human dataAdded 8 August 2026

   Cardio plus weights tops the table for weight loss in students

   A network meta-analysis of 39 randomised trials in 2,585 overweight or obese university students found combined aerobic-plus-resistance training most effective for improving BMI, body weight and fat mass, while HIIT produced the biggest reduction in body fat percentage.

   ⚠What it shows: Network meta-analysis of 39 RCTs restricted to overweight and obese university students; searches relied on a single database platform, and findings may not generalise to other age groups or settings.Meta-analysis · PeerJ

   Full breakdown →HIIT explained →Body Fat Calculator →Efficacy of four exercise modalities on body composition in overweight and obese university students: a network meta-analysis of randomized controlled trials. PeerJ 2026
4. Trainingwell supported · human dataAdded 8 August 2026

   HIIT alongside lifting doesn't blunt muscle growth, but watch lower-body strength

   Adding high-intensity interval training to a lifting programme did not compromise muscle hypertrophy or upper-body strength gains in a meta-analysis, though lower-body strength gains were slightly reduced (effect size -0.248): a penalty that trended larger with cycling-based HIIT than with running.

   ⚠What it shows: Meta-analysis pooling trials of concurrent HIIT and resistance training versus lifting alone; the lower-body effect was small and borderline (p = 0.049), and the cycling-versus-running difference was a non-significant trend.Meta-analysis · J Sports Sci

   Full breakdown →HIIT explained →One-Rep Max Calculator →The compatibility of concurrent high intensity interval training and resistance training for muscular strength and hypertrophy: a systematic review and meta-analysis. J Sports Sci 2018
5. Trainingwell supported · human dataAdded 8 August 2026

   Muscle gained in later life fades when training stops, but not straight away

   In older adults, muscle size gained through resistance training declines again once training stops, a meta-analysis found (Cohen's d -0.83 after cessation); losses were significant after 31-52 weeks of detraining but not after 12-24 weeks.

   ⚠What it shows: Meta-analysis of only 6 studies (8 groups) in older adults, with detraining windows ranging from 12 to 52 weeks; the exact time course of muscle loss remains unestablished.Meta-analysis · Int J Environ Res Public Health

   Full breakdown →Sarcopenia explained →Use It or Lose It? A Meta-Analysis on the Effects of Resistance Training Cessation (Detraining) on Muscle Size in Older Adults. Int J Environ Res Public Health 2022
6. Trainingwell supported · human dataAdded 8 August 2026

   Cardio can eat into lifting gains: how much depends on the dose and the modality

   A meta-analysis of 21 studies found endurance training done alongside lifting reduced gains in hypertrophy, strength and especially power versus lifting alone, with interference worsening as endurance frequency and duration increased. Running, but not cycling, was linked to significant decrements in hypertrophy and strength in this analysis.

   ⚠What it shows: Meta-analysis of 21 studies; the moderator findings on frequency, duration and modality are correlational across studies, not head-to-head trial comparisons.Meta-analysis · J Strength Cond Res

   Full breakdown →Hypertrophy explained →Training Volume Calculator →Concurrent training: a meta-analysis examining interference of aerobic and resistance exercises. J Strength Cond Res 2012
7. Trainingwell supported · human dataAdded 8 August 2026

   For older lifters, moving fast may beat moving slow when everyday function is the goal

   Power training, lifting with fast, high-velocity movement, showed a small advantage over conventional slow-velocity resistance training for functional outcomes in over-60s, in a meta-analysis of 11 trials with 377 participants (pooled effect size 0.32).

   ⚠What it shows: Meta-analysis of 11 small trials (377 community-dwelling people over 60); the pooled advantage was small, several confidence intervals crossed zero, and no firm conclusion could be made on safety.Meta-analysis · Age Ageing

   Full breakdown →Sarcopenia explained →Is power training or conventional resistance training better for function in elderly persons? A meta-analysis. Age Ageing 2011
8. Trainingpreliminary · human dataAdded 8 August 2026

   Strength training helps sarcopenic obesity even when body composition won't budge

   In older adults with sarcopenic obesity, high-speed circuit resistance training significantly improved muscle strength and physical function, even though neither exercise nor an extra 15 g of daily protein changed body composition.

   ⚠What it shows: Systematic review that found only two eligible trials (61 participants in total, mean age ≥65); the evidence base is very thin and body composition did not change significantly in either study.Systematic review · Nutr Res

   Full breakdown →Sarcopenia explained →Body Fat Calculator →Effectiveness of nutritional and exercise interventions to improve body composition and muscle strength or function in sarcopenic obese older adults: A systematic review. Nutr Res 2017
9. Trainingwell supported · human dataAdded 6 August 2026

   Stopping training doesn't erase your gains overnight

   Across 86 randomised trials (n=5,670), many exercise-induced gains, including body mass, waist circumference and maximal oxygen uptake, remained better than baseline even after training stopped, with residual benefits fading in an outcome-specific, time-dependent way while muscle mass, resting heart rate and LDL cholesterol benefits did not persist.

   ⚠What it shows: Meta-analysis of 86 RCTs (n=5,670); residual effects varied widely by outcome and detraining duration, and several markers, resting heart rate, LDL cholesterol, muscle mass and lean body mass, were no longer significantly improved at any follow-up.Systematic review · Front Physiol

   Full breakdown →Deload explained →VO2max Calculator →The effects of detraining on body composition and cardiometabolic health: a systematic review and meta-analysis of randomized controlled trials. Front Physiol 2026
10. Trainingwell supported · human dataAdded 6 August 2026

    Resistance training cut CRP in older adults

    A meta-analysis of 18 randomised controlled trials in 539 adults aged 60 and over found resistance training reduced C-reactive protein (effect size -0.72), TNF-α (-0.56) and IL-10 (-3.34), and tended to reduce IL-6 (-0.59). The CRP reduction held across every subgroup, including age, training method, intensity, weekly frequency and programme duration.

    ⚠What it shows: Pooled data from 18 RCTs and 539 adults aged 60 and over, using blood markers rather than disease outcomes; protocols were heterogeneous and the anti-inflammatory cytokine IL-10 also fell, which complicates the story.Meta-analysis · Int J Environ Res Public Health

    Full breakdown →Effects of Resistance Training on C-Reactive Protein and Inflammatory Cytokines in Elderly Adults: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Int J Environ Res Public Health 2022
11. Trainingpreliminary · human dataAdded 6 August 2026

    Blood flow restriction adds size and strength, barely

    Across 12 studies of 859 team-sport athletes, adding blood flow restriction to resistance training produced small additional gains in muscle hypertrophy (SMD 0.32) and strength (SMD 0.42) compared with resistance training alone. Jumping and sprinting performance showed no statistically significant difference.

    ⚠What it shows: Meta-analysis of 12 studies in 859 team-sport athletes; effects were small, heterogeneity was low but protocols varied, and the review cannot say which cuff pressures, loads or programme lengths drive the result.Study · Front Physiol

    Full breakdown →Hypertrophy explained →Training Volume Calculator →Muscle hypertrophy and strength improvements following blood flow restriction combined with resistance training in team-athletes: a systematic review and meta-analysis. Front Physiol 2026
12. Trainingpreliminary · human dataAdded 6 August 2026

    One quick stretch won't move your hamstrings

    In a dose-response meta-analysis of 84 trials (3008 non-athletes, 1059 athletes) with clinically confirmed hamstring shortening, static stretching improved range of motion versus no intervention (active knee extension 9.03°, passive knee extension 8.44°, straight leg raise 12.11°), while proprioceptive neuromuscular facilitation gained 10.10° on active knee extension and held a small 3.18° advantage over static stretching. A brief 1.5-minute single session did not exceed the 12° minimal detectable change, whereas repeated stretching over at least 1 week totalling 70 minutes was more likely to.

    ⚠What it shows: Meta-analysis of 84 randomised and crossover trials in healthy people with clinically confirmed hamstring shortening, but most studies carried high or some-concerns risk of bias and certainty ranged from very low to high; the dose-response curves are modelled, not tested head-to-head.Review · Ann Phys Rehabil Med

    Full breakdown →Optimal stretching dose for improving range of motion in non-athletes and athletes with hamstring shortening: a dose-response meta-analysis. Ann Phys Rehabil Med 2026
13. Trainingpreliminary · human dataAdded 6 August 2026

    Fasting didn't blunt gains from lifting in 11 trials

    An exploratory multilevel meta-analysis of 11 trials in 303 generally healthy, mostly young adults found that adding intermittent fasting, usually time-restricted eating, to resistance training produced broadly similar adaptations to resistance training alone (g = 0.09, 95% CI −0.23 to 0.40). There were no clear differences in maximal strength, local muscular endurance, hypertrophy-related outcomes or explosive and high-speed performance.

    ⚠What it shows: Exploratory meta-analysis of just 11 randomised or crossover trials totalling 303 mostly young participants of varied training status, with interventions running from 4 weeks to 12 months; the confidence interval spans zero in both directions, so it shows no clear difference rather than proven equivalence.Review · Front Nutr

    Full breakdown →Hypertrophy explained →Protein Intake Calculator →Effects of intermittent fasting combined with resistance training on training adaptations: an exploratory multilevel meta-analysis. Front Nutr 2026
14. Trainingpreliminary · human dataAdded 6 August 2026

    Lifting lowers blood pressure after menopause

    Pooling 60 controlled trials in postmenopausal women, resistance training of at least four weeks significantly lowered systolic (g=0.68) and mean blood pressure (g=0.68), with smaller reductions in resting heart rate (g=0.30) and diastolic pressure (g=0.37). Echocardiographic studies reported no adverse structural changes to the heart.

    ⚠What it shows: Systematic review and meta-analysis of 60 randomised and non-randomised controlled trials in postmenopausal women; effects on heart rate and diastolic pressure were small, and the vascular and heart-rate-variability findings were only described narratively, not pooled.Study · J Appl Physiol (1985)

    Full breakdown →Left ventricular hypertrophy explained →Heart Age Calculator →Resistance Training Improves Cardiovascular Health in Postmenopausal Women: Systematic Review and Meta-Analysis. J Appl Physiol (1985) 2026
15. Trainingpreliminary · human dataAdded 6 August 2026

    Unblinded testers inflated strength gains in trials

    Across 73 progressive resistance training trials in older adults (18 with blinded assessors, 55 unblinded), trials whose outcome assessors were blinded reported smaller lower-limb strength effects, a difference of -0.80 (95% CI -1.35 to -0.25) and -0.65 after adjusting for intention-to-treat analysis, suggesting unblinded trials exaggerated the gains.

    ⚠What it shows: Retrospective meta-regression of 73 resistance training trials in older adults published before 2007, with only 18 of them using blinded assessors; it compares trials rather than randomising blinding, so other differences between those trials could contribute, and the findings may not transfer to younger populations or newer trials.Meta-analysis · Am J Phys Med Rehabil

    Full breakdown →Do unblinded assessors bias muscle strength outcomes in randomized controlled trials of progressive resistance strength training in older adults?. Am J Phys Med Rehabil 2011
16. Trainingpreliminary · human dataAdded 6 August 2026

    Passive muscle building is still not proven

    Pooling the only three eligible trials, totalling 37 untrained adults, blood flow restriction combined with neuromuscular electrical stimulation produced a medium but statistically non-significant effect on lower-limb muscle growth compared with control (d = 0.64, 95% CI -0.37 to 1.65, p = 0.176).

    ⚠What it shows: Systematic review and meta-analysis, but the entire evidence base is three studies in 37 untrained healthy adults aged 18-64, lower limb only, interventions of at least 14 days; the pooled effect was not statistically significant and the confidence interval crosses zero.Meta-analysis · Sci Rep

    Full breakdown →Hypertrophy explained →Effects of combined blood flow restriction and neuromuscular electrical stimulation on skeletal muscle hypertrophy in adults: a systematic review and meta analysis. Sci Rep 2026
17. Trainingwell supported · human dataAdded 6 August 2026

    Weights cut HbA1c and blood pressure in type 2 diabetes

    A meta-analysis of 33 randomised trials in 1,396 middle-aged and older adults with type 2 diabetes found resistance training reduced the atherogenic index of plasma (effect size -0.56) and improved glycaemic control, lowering HbA1c by 0.62% and HOMA-IR by 0.90. Systolic blood pressure fell by 3.91 mmHg and body fat by 0.54%, while VO2max rose, with stronger effects in overweight or obese participants.

    ⚠What it shows: Meta-analysis of 33 randomised trials with a modest combined sample (n = 1,396) of middle-aged and older adults with type 2 diabetes; heterogeneity was substantial across several outcomes, methodological quality varied, and the included studies were geographically concentrated, so pooled effect sizes are indicative rather than precise.Meta-analysis · Maturitas

    Full breakdown →Insulin sensitivity explained →Metabolic Fitness Index →The impact of resistance training on the Atherogenic index of plasma and cardiometabolic health-related indicators in middle-aged and older adults with type 2 diabetes: A systematic review and Meta-analysis. Maturitas 2026
18. 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
19. 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
20. 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
21. Trainingpreliminary · human dataAdded 1 August 2026

    Hill sprints may not build the strength you think

    Hill sprints are prized for building leg strength and speed, but a meta-analysis of 13 randomised trials found no significant pooled effect of uphill running on knee strength, jump performance or aerobic capacity. Narrative evidence still hinted at better running economy, repeated sprint ability and lactate clearance.

    ⚠What it shows: Meta-analysis of 13 RCTs but only 7 could be pooled, total n=308, with varied protocols and comparators; the authors rate the overall certainty of evidence as low.Meta-analysis · Medicine (Baltimore)

    Full breakdown →VO₂max explained →VO2max Calculator →Effects of uphill running on muscle strength, jumping performance, running time, and aerobic capacity outcomes in athletes and recreational adults: A systematic review and meta-analysis. Medicine (Baltimore) 2026
22. Trainingpreliminary · human dataAdded 1 August 2026

    Core work beat ankle drills for knee arthritis pain

    In a randomised trial of 100 adults with knee osteoarthritis, adding core stability exercises to conventional knee training produced greater improvements in pain, function and mobility over 8 weeks than adding foot-ankle strengthening. Between-group differences exceeded clinically important thresholds for pain and all knee-function subscales.

    ⚠What it shows: One RCT, n=100 adults aged 40+ with moderate (grade II-III) knee OA, 8 weeks only; the distal structural changes are exploratory and may reflect fluid shifts, not remodelling.RCT · Sci Rep

    Full breakdown →Comparative efficacy of an 8-week core stability program versus foot-ankle strengthening on pain, function, and distal structural parameters in individuals with knee osteoarthritis: a randomized controlled trial. Sci Rep 2026
23. Trainingpreliminary · human dataAdded 1 August 2026

    Wobbly-surface core work sharpened elite shooters' aim

    In a pilot trial with 20 national-level air pistol shooters, 8 weeks of trunk core training on unstable surfaces such as Swiss balls and BOSU balls appeared to improve postural control and shooting precision more than the same training on stable ground. After statistical correction, only 10.5-ring stability and muzzle velocity remained significant, so the rest is exploratory.

    ⚠What it shows: Pilot RCT, n=20 elite shooters split 10 per group, 8 weeks; most outcomes lost significance after FDR correction, so findings are exploratory and need larger, registered trials.RCT · Sci Rep

    Full breakdown →Unstable trunk core strength training improves shooting performance and holding stability in elite 10 m air pistol athletes: a pilot randomized controlled trial. Sci Rep 2026
24. Trainingpreliminary · human dataAdded 30 July 2026

    Hip work boosted pelvic floor strength gains

    In 60 women aged 30-65 with stress or mixed urinary incontinence, six weeks of biofeedback-assisted pelvic floor training improved strength and quality of life in every group, but adding hip rotator strengthening produced the biggest strength gain, a mean difference of 4.44 cm H2O over pelvic floor training alone. Differences between groups in Oxford grading and quality of life were not statistically significant.

    ⚠What it shows: Single-centre RCT, 60 women aged 30-65 with stress or mixed incontinence and 55 completers, six weeks only; the strength advantage was measured on a perineometer rather than symptom counts, and quality-of-life differences between groups did not reach significance.Study · Int Urogynecol J

    Full breakdown →Hip Muscle Strengthening and Electrical Stimulation as Adjuncts to Pelvic Floor Training on Urinary Incontinence. Int Urogynecol J 2026

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