body

Muscle Mass Increase

A focused look at Muscle Mass Increase within the body category.

28Practices

These are research findings, not promises. Most options have little evidence, and results differ from person to person.

What may help

What studies found for each option, best evidence first.

28 options:4 some evidence13 not enough evidence6 personal stories only5 no benefit found

What studies foundSize of effect

SwimmingpracticeSome evidence it helpsSize of effect: Not known
Some human studies found a benefit. More research could change this.
All 4 studies with a clear result found a benefit. Strongest study: a pooled analysis of several trials.
A pooled analysis of randomized and non-randomized human studies reported a mean increase in lean mass of 1.96 kg. In a randomized trial of 34 people, an increase in muscle-fiber volume was observed only in the swimming exercise group at L2-L3 (0.21 cm^3).
Open the Swimming page
Tabata TrainingpracticeSome evidence it helpsSize of effect: Not known
Some human studies found a benefit. More research could change this.
All 4 studies with a clear result found a benefit. Strongest study: a randomized controlled trial.
Open the Tabata Training page
Latin Dance FitnesspracticeSome evidence it helpsSize of effect: Not known
Some human studies found a benefit. More research could change this.
All 2 studies with a clear result found a benefit. Strongest study: a randomized controlled trial.
A 2019 trial of 98 participants reported muscle-mass increases of 1.70 kg in the ZF group and 3.237 kg in the ZF + BW group. A 2025 trial also found greater muscle mass in the ZG group than the control group.
Open the Latin Dance Fitness page
TENS / EMS TherapypracticeSome evidence it helpsSize of effect: Not known
Some human studies found a benefit. More research could change this.
All 2 studies with a clear result found a benefit. Strongest study: a randomized controlled trial.
A trial found that the daily EMS group had a greater increase in muscle mass than the no EMS group. Another trial measured rectus femoris cross-sectional area and found a difference between groups, without reporting the direction in the finding.
Open the TENS / EMS Therapy page
Tai ChipracticeNot enough evidence
Too few or too small studies to know if it works.
4 of 5 studies found a benefit; 1 found none. Strongest study: a pooled analysis of several trials.
Open the Tai Chi page
Strength TrainingpracticeNot enough evidence
Too few or too small studies to know if it works.
36 of 52 studies found a benefit; 16 found none. Strongest study: a pooled analysis of several trials.
A pooled analysis of randomized trials involving 293 people in its quadriceps-mass analysis found that BFRT increased quadriceps mass versus control. By contrast, pooled analyses whose designs were not recorded found no significant improvement in SMI among 240 people, so findings differ across measures.
Open the Strength Training page
High-Intensity Interval Training (HIIT)practiceNot enough evidence
Too few or too small studies to know if it works.
11 of 21 studies found a benefit; 10 found none. Strongest study: a pooled analysis of several trials.
Open the High-Intensity Interval Training (HIIT) page
CardiopracticeNot enough evidence
Too few or too small studies to know if it works.
2 of 3 studies found a benefit; 1 found none. Strongest study: a pooled analysis of several trials.
Open the Cardio page

AcupuncturepracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit. Strongest study: a pooled analysis of several trials.
Open the Acupuncture page
Brisk WalkingpracticeNot enough evidence
Too few or too small studies to know if it works.
2 of 5 studies found a benefit; 3 found none. Strongest study: a randomized controlled trial.
A 2022 quasi-experimental study found percent total lean body mass increased by 3.3% after 30 weeks of walking. Findings are mixed: a 2016 trial found a 0.1 kg increase in lower-limb lean body mass, but the change could not be attributed to brisk walking because a corresponding change occurred in the control group.
Open the Brisk Walking page
PilatespracticeNot enough evidence
Too few or too small studies to know if it works.
5 of 7 studies found a benefit; 2 found none. Strongest study: a randomized controlled trial.
A 2025 trial found a change in skeletal muscle mass after 24 weeks among 43 people, and a review reported changes in several abdominal and back muscles. Results differ: a pooled analysis found no statistically significant effect on lean body mass among 61 people.
Open the Pilates page
CalisthenicspracticeNot enough evidence
Too few or too small studies to know if it works.
2 of 3 studies found a benefit; 1 found none. Strongest study: a randomized controlled trial.
A 2023 randomized trial in people with overweight found that muscle thickness increased in both groups, with no significant differences between groups for the gastrocnemius, rectus femoris or gluteus maximus.
Open the Calisthenics page
FastingpracticeNot enough evidence
Too few or too small studies to know if it works.
3 of 6 studies found a benefit; 3 found none. Strongest study: a randomized controlled trial.
A randomized controlled trial in 41 people reported an increase in fat-free mass percentage, and another trial in 20 people found arm circumference increased by ∼4% in the C/RT and ∼6% in the IF/RT groups. Results are not consistent: a meta-analysis of randomized trials involving 761 people found a slight but non-significant increase in fat-free mass following the fasting-mimicking diet.
Open the Fasting page
Hatha YogapracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit. Strongest study: a non-randomized trial.
Open the Hatha Yoga page
Red Light Therapy (Photobiomodulation)practiceNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit. Strongest study: a systematic review of studies.
A review of human studies reported improved masseter muscle thickness in children with spastic cerebral palsy. This finding concerns a specific muscle and population, rather than general muscle mass.
Open the Red Light Therapy (Photobiomodulation) page
CyclingpracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit. Strongest study: a randomized controlled trial.
Open the Cycling page
Social DancingpracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit. Strongest study: a randomized controlled trial.
In a randomized trial of 34 healthy people, muscle thickness increased after training by 16% for VL, 17% for TA, 19% for BF and 15% for GM.
Open the Social Dancing page
Hot YogapracticeOnly personal stories
Only people's own stories online. No study has tested it.
The one study found a benefit.
Expert commentary suggests Hot Yoga may lead to modest increases in lean muscle mass through prolonged isometric contractions against body weight in a heated environment. A small number of community members have also reported this effect; these are personal accounts.
Open the Hot Yoga page
DancepracticeOnly personal stories
Only people's own stories online. No study has tested it.
Based on one study.
Open the Dance page
Jump Rope TrainingpracticeOnly personal stories
Only people's own stories online. No study has tested it.
Based on one study.
Open the Jump Rope Training page
Mobility TrainingpracticeOnly personal stories
Only people's own stories online. No study has tested it.
Based on one study.
Open the Mobility Training page
Indoor RowingpracticeOnly personal stories
Only people's own stories online. No study has tested it.
Based on one study.
Open the Indoor Rowing page
Vinyasa YogapracticeOnly personal stories
Only people's own stories online. No study has tested it.
Based on one study.
Open the Vinyasa Yoga page
QigongpracticeNo benefit found
Studies looked for a benefit and did not find one.
The one study found no benefit. Strongest study: a pooled analysis of several trials.
Open the Qigong page
Infrared SaunapracticeNo benefit found
Studies looked for a benefit and did not find one.
0 of 2 studies found a benefit; 2 found none. Strongest study: a non-randomized trial.
Studies did not support an increase in muscle mass: a 2025 quasi-experimental study involving 14 people found no change in vastus lateralis muscle CSA.
Open the Infrared Sauna page
Hot BathpracticeNo benefit found
Studies looked for a benefit and did not find one.
The one study found no benefit. Strongest study: a randomized controlled trial.
Human evidence has not established an effect on muscle mass.
Open the Hot Bath page
Ice Bath / Cold PlungepracticeNo benefit found
Studies looked for a benefit and did not find one.
0 of 5 studies found a benefit; 5 found none.
A 15-week randomized trial of 40 found body mass and fat-free mass increased similarly across all groups, so it did not support a specific muscle-mass benefit.
Open the Ice Bath / Cold Plunge page
YogapracticeNo benefit found
Studies looked for a benefit and did not find one.
0 of 2 studies found a benefit; 2 found none.
Open the Yoga page

Show all 28

Comparing practices

SwimmingSome evidence it helps3 trials
Tabata TrainingSome evidence it helps4 trials
TENS / EMS TherapySome evidence it helps2 trials

The expert view shows every study, dose protocol and source.

What may help

Linked to improving it28 listed

Start here

Most likely to help, from the evidence we have

PracticesSwimmingCertaintyMediumSourceRCT4 other sources
A pooled analysis of randomized and non-randomized human studies reported a mean increase in lean mass of 1.96 kg (95% CI 0.21-3.71). In a randomized trial of 34 people, an increase in muscle-fiber volume was observed only in the swimming exercise group at L2-L3 (0.21 [0.06 to 0.36] cm^3).
Who was studied
Healthy people and patients
Hypertension
Study result
and lean mass (mean difference 1.96 kg; 95% CI 0.21-3.71)
Open Swimming
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PracticesTabata TrainingCertaintyMediumSourceClinical5 other sources
In a 2025 randomized trial of 64 participants, the experimental group had higher fat-free weight and muscle content than the control group; the reported difference in fat-free weight was 3.99 kg. A separate trial found a 0.30 ± 0.08 cm increase in biceps muscle thickness in the Tabata group.
Who was studied
Healthy people and patients
Obesity
Overweight
Study result
The experimental group had significantly higher fat-free weight, muscle content, and basal metabolic rate (P < 0.05).
Open Tabata Training
→
PracticesLatin Dance FitnessCertaintyMediumSourceClinical3 other sources
A 2019 trial of 98 participants reported muscle-mass increases of 1.70 kg in the ZF group and 3.237 kg in the ZF + BW group. A 2025 trial also found greater muscle mass in the ZG group than the control group.
Who was studied
Healthy people
Menopause
Study result
an increase in muscle mass (ZF = 1.70 ± 0.581, p = 0.005; ZF + BW = 3.237 ± 0.657, p < 0.0001)
Open Latin Dance Fitness
→
PracticesTENS / EMS TherapyCertaintyMediumSourceClinical2 other sources
A trial found that the daily EMS group had a greater increase in muscle mass than the no EMS group (p = 0.002). Another trial measured rectus femoris cross-sectional area and found a difference between groups (p = 0.002), without reporting the direction in the finding.
Who was studied
Healthy people and patients
Osteoarthritis
Study result
CSA of the rectus femoris was measured with real-time B-mode ultrasonography (CX50, Philips). The CSA values in the CMB group were significantly different from the CTR group (p = 0.002, ES = -1.204).
Open TENS / EMS Therapy
→

Low probability(21)

PracticesTai ChiCertaintyLowSourceRCTModerate effect5 other sources
A 2026 trial of 47 people reported an increase in appendicular skeletal muscle mass index from 4.79 ± 0.79 kg/m² to 5.16 ± 0.80 kg/m²; the authors described this as exploratory. A 2023 trial also reported a muscle-mass increase in a Tai Chi group compared with control.
How big is the effect
Moderate effectA clear difference on average.
Who was studied
Healthy people and patients
Diabetes
Elderly
Hypertension
Osteoarthritis
Sarcopenia
Study result
ASMI of the AI-based tele-training group significantly increased from 4.79 ± 0.79 kg/m² at baseline to 5.16 ± 0.80 kg/m² (p < 0.01). Authors describe this as exploratory, from a single RCT, and not meta-analysed.
Open Tai Chi
→
PracticesHigh-Intensity Interval Training (HIIT)CertaintyLowSourceRCTSmall effectconflicting findings22 other sources
A pooled analysis of randomized trials involving 71 people found a small gain in quadriceps cross-sectional area, with a weighted percentage change of 4.72 ± 1.35%. A review reported fat-free mass increases of 5–10%, but another pooled analysis did not find a statistically significant effect on muscle mass.
How big is the effect
Small effectA small but noticeable difference on average.
Who was studied
Healthy people and patients
Breast Cancer
Cancer
Diabetes Type1
Diabetes Type2
Dyslipidemia
Hiv Aids
+4 more
Study result
Pre–post effect sizes also suggest that participants who underwent HIIT/SIT interventions incurred small to moderate gains in quadriceps CSA ... an effect size of 0.36 (0.34, 0.37) and a weighted %∆ 4.72 ± 1.35% of was observed for quadriceps CSA
Open High-Intensity Interval Training (HIIT)
→
PracticesStrength TrainingCertaintyLowSourceRCTSmall effectconflicting findings53 other sources
A pooled analysis of randomized trials involving 293 people in its quadriceps-mass analysis found that BFRT increased quadriceps mass versus control (SMD = 0.82, 95% CI: 0.11-1.53). By contrast, pooled analyses whose designs were not recorded found no significant improvement in SMI among 240 people (SMD = 0.13, 95% CI: -0.13 to 0.38), so findings differ across measures.
How big is the effect
Small effectA small but noticeable difference on average.
Who was studied
Healthy people and patients
Diabetes Type2
Obesity
Overweight
Sarcopenia
Study result
BFRT significantly increased quadriceps mass compared with CON (SMD = 0.82, 95% CI: 0.11-1.53).
Open Strength Training
→
PracticesCardioCertaintyLowSourceRCTconflicting findings4 other sources
A quasi-experimental study in 16 people found total lean mass increased from 51.3 ± 8.1 to 52.5 ± 8.2 kg (P = 0.003, r = 0.526). However, a pooled analysis of randomized trials found an imprecise lean-body-mass estimate whose confidence interval crossed the null.
Who was studied
Healthy people and patients
Obesity
Study result
high-density lipoprotein cholesterol (HDL-C) and lean body mass (LBM) increased
Open Cardio
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PracticesAcupunctureCertaintyLowSourceRCTLarge effect1 other source
In a pooled analysis of randomized trials involving 627 people with sarcopenia, acupuncture was associated with higher muscle mass scores (SMD 1.31 [0.19–2.43]).
How big is the effect
Large effectA big difference on average. Check how strong the evidence is.
Who was studied
People with a condition
Sarcopenia
Study result
muscle mass (SMD = 1.31, 95% CI: 0.19–2.43)
Open Acupuncture
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PracticesBrisk WalkingCertaintyLowSourceClinical6 other sources
A 2022 quasi-experimental study found percent total lean body mass increased by 3.3% after 30 weeks of walking. Findings are mixed: a 2016 trial found a 0.1 kg increase in lower-limb lean body mass, but the change could not be attributed to brisk walking because a corresponding change occurred in the control group.
Who was studied
Healthy people and patients
Ibd
Menopause
Obesity
Osteoporosis
Overweight
Study result
significant increase in the walking group (F=4.824, p=0.039)
Open Brisk Walking
→
PracticesPilatesCertaintyLowSourceClinicalconflicting findings8 other sources
A 2025 trial found a change in skeletal muscle mass after 24 weeks among 43 people, and a review reported changes in several abdominal and back muscles. Results differ: a pooled analysis found no statistically significant effect on lean body mass among 61 people.
Who was studied
Healthy people and patients
Addiction
Obesity
Overweight
Study result
An investigation with a non-equivalent comparator found a positive significant between-group change in the Pilates group in the transverse abdominis, lumbar multifidus, and internal oblique muscles.
Open Pilates
→
PracticesCalisthenicsCertaintyLowSourceClinical4 other sources
A 2023 randomized trial in people with overweight found that muscle thickness increased in both groups, with no significant differences between groups for the gastrocnemius, rectus femoris or gluteus maximus.
Who was studied
Healthy people and patients
Overweight
Study result
Both groups also showed significant increases in muscle thickness (p < 0.05), with no significant differences in Gastrocnemius, Rectus femoris and Gluteus maximus (p > 0.05)
Open Calisthenics
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PracticesFastingCertaintyLowSourceClinicalTrivial effectconflicting findings7 other sources
A randomized controlled trial in 41 people reported an increase in fat-free mass percentage (~2×; p ≤ 0.030), and another trial in 20 people found arm circumference increased by ∼4% in the C/RT and ∼6% in the IF/RT groups. Results are not consistent: a meta-analysis of randomized trials involving 761 people found a slight but non-significant increase in fat-free mass following the fasting-mimicking diet (WMD = 0.885 kg, 95% CI: −0.059, 1.830, p = 0.066).
How big is the effect
Trivial effectReal in studies, but too small for most people to notice.
Who was studied
Healthy people and patients
Breast Cancer
Diabetes Type2
Fatty Liver Nafld
Metabolic Syndrome
Obesity
Overweight
+1 more
Study result
increased fat-free mass percentage (~2×; p ≤ 0.030)
Open Fasting
→
PracticesHatha YogaCertaintyLowSourceClinical2 other sources
A quasi-experimental study with 34 participants with PMS found muscle mass (%) increased from 28.63 ± 2.84 to 29.19 ± 3.15 (p=0.006, Cohen's d=0.188), an effect classified as trivial.
Who was studied
People with a condition
Pms
Study result
Muscle mass (%) increased from 28.63 ± 2.84 to 29.19 ± 3.15, p=0.006, Cohen's d=0.188
Open Hatha Yoga
→
PracticesRed Light Therapy (Photobiomodulation)CertaintyLowSourceClinical1 other source
A review of human studies reported improved masseter muscle thickness in children with spastic cerebral palsy. This finding concerns a specific muscle and population, rather than general muscle mass.
Who was studied
People with a condition
Study result
Photobiomodulation therapy (PBMT) shows efficacy in improving masseter muscle thickness and oral-health-related quality of life in children with spastic cerebral palsy.
Open Red Light Therapy (Photobiomodulation)
→
PracticesCyclingCertaintyLowSourceClinical1 other source
A randomized trial in 55 healthy people found a 1 ± 2% change in thigh circumference (P = 0.008).
Who was studied
Healthy people
Study result
thigh circumference (1 ± 2%, P = 0.008)
Open Cycling
→
PracticesSocial DancingCertaintyLowSourceClinical1 other source
In a randomized trial of 34 healthy people, muscle thickness increased after training by 16% for VL, 17% for TA, 19% for BF and 15% for GM.
Who was studied
Healthy people
Study result
After training, the DG showed greater (p < .05) thickness for VL (16%), TA (17%), BF (19%), and GM (15%)
Open Social Dancing
→
PracticesHot YogaCertaintyLowSourceAnecdotal2 other sources
Expert commentary suggests Hot Yoga may lead to modest increases in lean muscle mass through prolonged isometric contractions against body weight in a heated environment. A small number of community members have also reported this effect; these are personal accounts.
Study result
May lead to modest increases in lean muscle mass, due to prolonged isometric contractions against body weight in heated environment.
Open Hot Yoga
→
PracticesDanceCertaintyLowSourceAnecdotal1 other source
This effect was mentioned in 2 of 107 Reddit reports discussing it.
→
PracticesJump Rope TrainingCertaintyLowSourceAnecdotal1 other source
This effect was mentioned in 2 of 213 Reddit reports discussing it.
→
PracticesMobility TrainingCertaintyLowSourceAnecdotal1 other source
This effect was mentioned in 3 of 276 Reddit reports discussing it.
→
PracticesIndoor RowingCertaintyLowSourceAnecdotal1 other source
This effect was mentioned in 2 of 242 Reddit reports discussing it.
→
PracticesVinyasa YogaCertaintyLowSourceAnecdotal1 other source
This effect was mentioned in 9 of 312 Reddit reports discussing it.
→
PracticesIce Bath / Cold PlungeCertaintyLowSourceTheoreticalTrivial effect6 other sources
A 15-week randomized trial of 40 found body mass and fat-free mass increased similarly across all groups (~ 2 kg; time effect: p < 0.001), so it did not support a specific muscle-mass benefit.
How big is the effect
Trivial effectReal in studies, but too small for most people to notice.
Who was studied
Healthy people
Open Ice Bath / Cold Plunge
→
PracticesYogaCertaintyLowSourceTheoretical3 other sources
A randomized trial involving 50 people found no significant change in skeletal muscle mass, body fat mass, or RMR; the between-group mean change in SMM had p=0.06. The studies did not support an increase in muscle mass.
Who was studied
Healthy people and patients
Open Yoga
→

Very low probability(3)

PracticesQigongCertaintyVery lowSourceRCT1 other source
A pooled analysis of randomized trials found no clear overall effect on muscle mass (MD 0.11 kg [-0.9, 1.11]); the studies did not support this effect.
Who was studied
People with a condition
Frailty
Sarcopenia
Open Qigong
→
PracticesInfrared SaunaCertaintyVery lowSourceClinical2 other sources
Studies did not support an increase in muscle mass: a 2025 quasi-experimental study involving 14 people found no change in vastus lateralis muscle CSA (15.3 ± 4.6 vs. 15.2 ± 4.6 cm^2; P = 0.768).
Who was studied
Healthy people
Open Infrared Sauna
→
PracticesHot BathCertaintyVery lowSourceClinical1 other source
Human evidence has not established an effect on muscle mass.
Who was studied
Healthy people
Open Hot Bath
→

Practices compared

Practices with at least one trial of their own for this goal. Ranked by how sure the evidence is, then effect size.Top 10 of 16

Practice	How sure	Effect size	Own trials	What worked in trials
Tabata Training	CertaintyMediumSourceClinical		4 trials or pooled analyses	30–36 min · 2–2.5×/week · 8–9 weeks
Swimming	CertaintyMediumSourceRCT		3 trials or pooled analyses	60 min · 2×/week · 6–8 weeks
TENS / EMS Therapy	CertaintyMediumSourceClinical		2 trials or pooled analyses	3–3.5×/week · 8 weeks
Latin Dance Fitness	CertaintyMediumSourceClinical		2 trials or pooled analyses	60 min · 2–2.5×/week · 12–14 weeks
Acupuncture	CertaintyLowSourceRCT	Large effect	1 trial or pooled analysis
Tai Chi	CertaintyLowSourceRCT	Moderate effect	4 trials or pooled analyses	2.5–2.8×/week · 12–14 weeks
Strength Training	CertaintyLowSourceRCT	Small effect	32 trials or pooled analyses	30–45 min · 1.3–2.5×/week · 4–15 weeks
High-Intensity Interval Training (HIIT)	CertaintyLowSourceRCT	Small effect	10 trials or pooled analyses	26–40 min · 2.5–3×/week · 6–9 weeks
Pilates	CertaintyLowSourceClinical		5 trials or pooled analyses	50–60 min · 2–3×/week · 8–10 weeks
Brisk Walking	CertaintyLowSourceClinical		2 trials or pooled analyses

What worked in trials: From the smallest to the typical amount in the trials that found this benefit. Not the most anyone did, not a target and not a limit.

How to read the evidence

Evidence tier — overall strength of the evidence for the whole compound

StrongWell established — backed by strong, consistent human research.
ModerateSome genuine support, but mostly from small or lower-quality studies. Promising, not proven.
PreliminaryEarly-stage evidence — a promising hypothesis, not an established effect yet.
LimitedVery limited evidence — treat this as a hypothesis, not proof.
InsufficientNot enough good evidence to draw conclusions yet.

Certainty — how sure we can be that the effect is real

Very highVery sure — strong, consistent evidence
HighFairly sure — consistent evidence from good studies
MediumModerately sure — new studies could change this
LowNot sure — little or mixed evidence
Very lowVery unsure — almost no usable evidence

Source — where the data comes from

Meta-analysisPooled analysis of many trials — the strongest evidence
RCTRandomized controlled trial — a strong human study design
ClinicalA human clinical study
Reference knowledgeFrom general health-science or pharmacology references, not a study of this exact claim
Animal researchStudied in animals, not humans
Community reportsAggregated user reports — anecdotal signal, not evidence
TheoreticalMechanism-based reasoning, not yet tested

Study grade — quality of each underlying study (A best, D weakest)

AHigh-quality — strong, consistent human trials
BGood — solid evidence with some limitations
CModerate — limited, small, or mixed-quality studies
DWeak — preliminary, indirect, or animal-only

Confidence — how strongly the sources back a finding

A 0–100 score from study quality and agreement

Most supplement evidence is graded C–D. Read it as preliminary signal, not proof.

Full write-up

What is it

Muscle mass increase means a measurable increase in the size or amount of muscle tissue. It is a body-composition outcome, not the same as greater strength, endurance, or exercise performance, although these outcomes can overlap. Changes may be reflected in measurements of a body region or other assessments of muscle size. The evidence summarized here includes approaches such as Creatine, BCAA, Ashwagandha, and Cycling.

How interventions help

Interventions associated with muscle mass increase differ in how they are used and how quickly changes may appear. Creatine is used in daily protocols of 3-5 g/day, with loading in some studies, and onset has been categorized as days. Across interventions, study periods range from 28 days or 8 weeks to several months, while some training-related trials continued for 12 weeks to 18 months. This means the findings generally describe changes during an ongoing intervention rather than a guaranteed effect after stopping.

The outcomes measured are not identical. Reported changes include overall muscle mass, thigh circumference, and muscle cross-sectional area, so results from different interventions should not be treated as interchangeable. Some approaches are supplements, while others involve exercise or electrical stimulation; their practical use and the populations studied therefore differ. Evidence includes healthy participants, people with clinical conditions, and groups whose health status was not specified, so applicability is not uniform.

The findings are also more consistent for some interventions than others. For Whey Protein, Omega-3, and Collagen, studies did not all agree, and Citrulline increased in both the intervention and comparison groups in the reported finding. One L-Carnitine comparison did not clearly separate the intervention from ergometer exercise, despite a change within the L-Carnitine group. These patterns make the outcome better understood as an intervention-specific possibility than as a predictable result shared by every option.

Choosing guidance

For readers prioritizing controlled human evidence and a clearly defined regimen, Creatine, BCAA, and Ashwagandha are the most practical options to compare first. Creatine is the better fit when a relatively rapid appearance of effects and a consistent daily approach matter. Ashwagandha was studied over a defined multi-week course, while BCAA trials used varied dosing, making direct comparisons with other options less straightforward.

Whey Protein, Collagen, and Omega-3 may suit people already using them for broader nutrition or health goals, but their muscle-mass findings are not fully consistent across studies. They are less suitable when a predictable result is the main priority. L-Leucine also has human research, but its evidence is less settled for this specific outcome.

The population studied matters. Cycling evidence comes from healthy participants, whereas Tai Chi evidence comes from people with a clinical condition, so neither necessarily applies equally to every reader. Some options, including Citrulline, L-Carnitine, and Coenzyme Q10, have findings that should be interpreted cautiously because human applicability is not clearly established in the summary evidence. Options supported only by anecdotal reports, such as Hatha Yoga, Beetroot Extract, or Horny Goat Weed (Epimedium), are better viewed as unconfirmed rather than as comparable alternatives to controlled human research.