Overweight

Overweight is classified as a metabolic condition, providing a focused starting point for exploring its health context.

18What may help
1What to avoid

This list shows research findings, not treatments. Nothing here replaces medical care. If you have this condition, talk to a doctor.

What may help

What studies found for each option, best evidence first.

18 options:6 some evidence1 mixed11 not enough evidence

What studies foundSize of effect

Acceptance and Commitment Therapy (ACT)practiceSome evidence it helpsSize of effect: Not known
Some human studies found a benefit. More research could change this.
All 3 studies with a clear result found a benefit.
Pooled findings reported weight loss at the end of the intervention and 12 months post-intervention, alongside improvements in eating behaviour traits. Another analysis found a small improvement in BMI, psychological flexibility and weight stigma, but not eating behaviours or body mass.
Open the Acceptance and Commitment Therapy (ACT) page
FastingpracticeSome evidence it helpsSize of effect: Not known
Some human studies found a benefit. More research could change this.
All 15 studies with a clear result found a benefit.
A 2025 meta-analysis of 54 studies in people with overweight or obesity reported lower body weight with intermittent fasting strategies than with eating ad libitum. A 2026 meta-analysis of 22 randomized controlled trials found reductions in BMI and fasting blood glucose, but no significant effect on blood pressure.
Open the Fasting page
CardiopracticeSome evidence it helpsSize of effect: Not known
Some human studies found a benefit. More research could change this.
4 of 5 studies found a benefit; 1 found none.
Pooled analyses of randomized trials reported improved FMD and reduced PWV and CIMT in adults with overweight or obesity. A separate pooled analysis of 43 RCTs involving 2315 women found reductions in body fat percentage, BMI, fat mass, and waist circumference with several aerobic exercise approaches.
Open the Cardio page
High-Intensity Interval Training (HIIT)practiceSome evidence it helpsSize of effect: Not known
Some human studies found a benefit. More research could change this.
16 of 17 studies found a benefit; 1 found none.
A meta-analysis of randomized trials in overweight or obese adults reported improvements in body composition and VO₂max with HIIT and MICT compared with control. Another meta-analysis found HIIT improved enjoyment and maintained affective responses in this population.
Open the High-Intensity Interval Training (HIIT) page
YogapracticeSome evidence it helpsSize of effect: Not known
Some human studies found a benefit. More research could change this.
All 3 studies with a clear result found a benefit.
A pooled analysis whose study designs were not recorded reported benefits in adults with high BMI across blood pressure, lipid profile, glucose metabolism, and inflammatory markers. In youth with overweight or obesity, another pooled analysis whose study designs were not recorded reported BMI lower by −1.09 kg/m² and body fat percentage lower by −1.62%.
Open the Yoga page
Tai ChipracticeSome 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.
In an 12-week trial of 81 overweight male university students, both BW-TC and TH-TC improved flexibility, lower-limb strength, static and dynamic balance, and 6MWT compared with control. A separate 12-week trial in 81 overweight male college students reported improved body composition and blood lipids.
Open the Tai Chi page
Tabata TrainingpracticeMixed resultsSize of effect: Not known
Studies disagree: some found a benefit, others found none. Do not count on it.
2 of 3 studies found a benefit; 1 found none.
An RCT in 64 overweight female college students found improved inhibitory function and body composition with HIIT. In an 8-week RCT in 48 overweight older women, Tabata-style HIIT improved body-composition measures and cardiorespiratory measures, including VO2max, O2 pulse, MVO2, SBP, and HR.
Open the Tabata Training page
Strength TrainingpracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit.
Pooled randomized trials in adults with BMI ≥ 25 kg/m² reported improvements in cardiometabolic risk factors with resistance training, including a reduction in diastolic blood pressure.
Open the Strength Training page

Jump Rope TrainingpracticeNot enough evidence
Too few or too small studies to know if it works.
All 2 studies with a clear result found a benefit.
In overweight female college students, 4 weeks of dance-music jump-rope exercise was associated with within-group improvements in VC and BMI, but the changes did not differ significantly from stationary cycling.
Open the Jump Rope Training page
PilatespracticeNot enough evidence
Too few or too small studies to know if it works.
2 of 3 studies found a benefit; 1 found none.
A 2019 review reported one RCT in which the Pilates group improved VO2 max. Separately, an RCT in 20 women with obesity found reduced fat mass and increased muscle mass after 12 weeks of Pilates plus diet.
Open the Pilates page
BreathworkpracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit.
A trial in 40 overweight older women found improved functional fitness and quality of life compared with usual-care controls; body weight itself was not reported as an outcome.
Open the Breathwork page
Brisk WalkingpracticeNot enough evidence
Too few or too small studies to know if it works.
All 3 studies with a clear result found a benefit.
A randomized controlled trial found reduced fat mass among women with BMI >25 kg/m^2, but the reduction was not significant overall. A quasi-experimental walking program also found reduced waist circumference among participants classified as overweight or obese.
Open the Brisk Walking page
CalisthenicspracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit.
An 8-week randomized controlled trial in 48 people with overweight found improvements in body weight, BMI, and physical fitness after a combined HIIT and nutrition intervention, so the effects of exercise alone were not isolated.
Open the Calisthenics page
CyclingpracticeNot enough evidence
Too few or too small studies to know if it works.
1 of 2 studies found a benefit; 1 found none.
In an acute crossover trial, fasted cycling increased fat oxidation without increasing 24-h energy intake in 12 males with overweight. The studies disagree: pooled analyses whose designs were not recorded found no change in BMI across 2 trials, and cohort data did not link obesity with E-bike distance.
Open the Cycling page
Hatha YogapracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit.
In a study involving 71 people, the pre-training BMI of participants aged 30-39 and 40-49 was classified as overweight; the authors described HYT as a potential adjunct for obesity management.
Open the Hatha Yoga page
Hot BathpracticeNot enough evidence
Too few or too small studies to know if it works.
All 3 studies with a clear result found a benefit.
A small randomized trial reported that a program was useful for community residents selected for an overweight tendency. A separate trial examined hot-water immersion only in middle-aged people with overweight or obesity.
Open the Hot Bath page
SwimmingpracticeNot enough evidence
Too few or too small studies to know if it works.
The one study found a benefit.
Pooled analyses whose study designs were not recorded included overweight or obese sedentary populations and reported increased SPX with exercise.
Open the Swimming page
MeditationpracticeNot enough evidence
Too few or too small studies to know if it works.
1 of 2 studies found a benefit; 1 found none.
Open the Meditation page

Show all 18

May not suit people with this condition

Supplements and practices linked to problems for people with this condition.

Finnish SaunapracticeUnclear
In a quasi-experimental study of 45 considerably overweight men, 40-minute sauna sessions were described as potentially excessive and dangerous; by the fourth session, average blood pressure reached 140/94 mmHg and heart rate reached difficult or maximal-effort ranges. A separate cross-sectional study of 674 people linked high BMI with greater inferred risk of dehydration, but did not measure dehydration as an adverse outcome.
Open the Finnish Sauna page

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

What may help

Interventions recorded as helping with this condition18 listed

Most likely to help, from the evidence we have

PracticesAcceptance and Commitment Therapy (ACT)CertaintyMediumSourceMeta-analysis
Pooled findings reported weight loss at the end of the intervention and 12 months post-intervention, alongside improvements in eating behaviour traits. Another analysis found a small improvement in BMI (WMD=-0.50, p=0.02), psychological flexibility (g=-0.42, p=0.05) and weight stigma (WMD=-0.77, p<0.001), but not eating behaviours or body mass.
Who was studied
People with a condition
Study result
Overall significant weight loss effect at end of intervention and 12 months post-intervention, along with improvements in eating behaviour traits.
Open Acceptance and Commitment Therapy (ACT)
→
PracticesFastingCertaintyMediumSourceMeta-analysis
A 2025 meta-analysis of 54 studies in people with overweight or obesity reported lower body weight with intermittent fasting strategies than with eating ad libitum. A 2026 meta-analysis of 22 randomized controlled trials found reductions in BMI and fasting blood glucose, but no significant effect on blood pressure.
Who was studied
Healthy people and patients
Diabetes Type2
Fatty Liver Nafld
Metabolic Syndrome
Obesity
Overweight
Prediabetes
Study result
Meta-analysis of 54 studies in overweight/obese participants showing body weight reduction with intermittent fasting strategies vs ad-libitum diets.
Open Fasting
→
PracticesCardioCertaintyMediumSourceRCT
Pooled analyses of randomized trials reported improved FMD and reduced PWV and CIMT in adults with overweight or obesity. A separate pooled analysis of 43 RCTs involving 2315 women found reductions in body fat percentage, BMI, fat mass, and waist circumference with several aerobic exercise approaches.
Who was studied
People with a condition
Overweight
Study result
Pooled RCTs in adults with overweight or obesity showed improved FMD, reduced PWV and reduced CIMT versus control, with low certainty of evidence.
Open Cardio
→
PracticesHigh-Intensity Interval Training (HIIT)CertaintyMediumSourceRCT
A meta-analysis of randomized trials in overweight or obese adults reported improvements in body composition and VO₂max with HIIT and MICT compared with control. Another meta-analysis found HIIT improved enjoyment and maintained affective responses in this population.
Who was studied
Healthy people and patients
Obesity
Overweight
Study result
All included RCTs enrolled overweight or obese adults; HIIT and MICT improved body composition and VO₂max versus control in this population.
Open High-Intensity Interval Training (HIIT)
→
PracticesYogaCertaintyMediumSourceRCT
A pooled analysis whose study designs were not recorded reported benefits in adults with high BMI across blood pressure, lipid profile, glucose metabolism, and inflammatory markers. In youth with overweight or obesity, another pooled analysis whose study designs were not recorded reported BMI lower by −1.09 kg/m² and body fat percentage lower by −1.62%.
Who was studied
People with a condition
Obesity
Overweight
Study result
Meta-analysis of 30 RCTs (2,689 participants) showing yoga benefits on blood pressure, lipid profile, glucose metabolism, and inflammatory markers in adults with high BMI
Open Yoga
→
PracticesTabata TrainingCertaintyMediumSourceClinical
An RCT in 64 overweight female college students found improved inhibitory function and body composition with HIIT. In an 8-week RCT in 48 overweight older women, Tabata-style HIIT improved body-composition measures and cardiorespiratory measures, including VO2max, O2 pulse, MVO2, SBP, and HR.
Who was studied
Healthy people and patients
Overweight
Study result
RCT showing HIIT improved inhibitory function and body composition in overweight female college students.
Open Tabata Training
→
PracticesTai ChiCertaintyMediumSourceClinical
In an 12-week trial of 81 overweight male university students, both BW-TC and TH-TC improved flexibility, lower-limb strength, static and dynamic balance, and 6MWT compared with control. A separate 12-week trial in 81 overweight male college students reported improved body composition and blood lipids.
Who was studied
People with a condition
Study result
12-week RCT in 81 overweight male university students showed both BW-TC and TH-TC significantly improved flexibility, lower-limb strength, static/dynamic balance, and 6MWT versus control.
Open Tai Chi
→

Low probability(11)

PracticesStrength TrainingCertaintyLowSourceMeta-analysis
Pooled randomized trials in adults with BMI ≥ 25 kg/m² reported improvements in cardiometabolic risk factors with resistance training, including a reduction in diastolic blood pressure.
Who was studied
People with a condition
Overweight
Study result
Pooled RCTs in adults with BMI ≥ 25 kg/m² reported improved cardiometabolic risk factors with resistance training, including a significant reduction in diastolic blood pressure.
Open Strength Training
→
PracticesJump Rope TrainingCertaintyLowSourceRCT
In overweight female college students, 4 weeks of dance-music jump-rope exercise was associated with within-group improvements in VC and BMI, but the changes did not differ significantly from stationary cycling.
Who was studied
People with a condition
Obesity
Overweight
Study result
Children aged 9 to 12 years selected as overweight/obese were randomized to the rope-skipping and nutrition education arms.
Open Jump Rope Training
→
PracticesPilatesCertaintyLowSourceRCT
A 2019 review reported one RCT in which the Pilates group improved VO2 max. Separately, an RCT in 20 women with obesity found reduced fat mass and increased muscle mass after 12 weeks of Pilates plus diet.
Who was studied
Healthy people and patients
Heart Failure
Obesity
Overweight
Stroke
Study result
One RCT (Rayes et al., 2019) showed Pilates group had significant improvement in VO2 max
Open Pilates
→
PracticesBreathworkCertaintyLowSourceClinical
A trial in 40 overweight older women found improved functional fitness and quality of life compared with usual-care controls; body weight itself was not reported as an outcome.
Who was studied
People with a condition
Overweight
Study result
Functional fitness and quality of life improved in overweight older women versus usual-care controls; body weight itself was not reported as an outcome.
Open Breathwork
→
PracticesBrisk WalkingCertaintyLowSourceClinical
A randomized controlled trial found reduced fat mass among women with BMI >25 kg/m^2, but the reduction was not significant overall. A quasi-experimental walking program also found reduced waist circumference among participants classified as overweight or obese.
Who was studied
Healthy people and patients
Osteopenia
Osteoporosis
Overweight
Study result
Significant fat mass reduction in women with BMI >25 kg/m^2, though not significant overall.
Open Brisk Walking
→
PracticesCalisthenicsCertaintyLowSourceClinical
An 8-week randomized controlled trial in 48 people with overweight found improvements in body weight, BMI, and physical fitness after a combined HIIT and nutrition intervention, so the effects of exercise alone were not isolated.
Who was studied
People with a condition
Overweight
Study result
RCT showing significant improvements in body weight, BMI, and physical fitness after 8 weeks of HIIT and nutrition intervention.
Open Calisthenics
→
PracticesCyclingCertaintyLowSourceClinical
In an acute crossover trial, fasted cycling increased fat oxidation without increasing 24-h energy intake in 12 males with overweight. The studies disagree: pooled analyses whose designs were not recorded found no change in BMI across 2 trials (SMD −0.06, 95% CI −0.51 to 0.40, p=0.802), and cohort data did not link obesity with E-bike distance.
Who was studied
Healthy people and patients
Study result
Acute crossover trial in 12 males with overweight: fasted cycling increased fat oxidation and did not increase 24-h energy intake; authors suggest it may be effective for weight management in overweight.
Open Cycling
→
PracticesHatha YogaCertaintyLowSourceClinical
In a study involving 71 people, the pre-training BMI of participants aged 30-39 and 40-49 was classified as overweight; the authors described HYT as a potential adjunct for obesity management.
Who was studied
Healthy people
Overweight
Study result
Pre-training BMI of the 30-39 and 40-49 year groups was classed as overweight per WHO criteria; authors describe HYT as a potential adjunct for obesity management.
Open Hatha Yoga
→
PracticesHot BathCertaintyLowSourceClinical
A small randomized trial reported that a program was useful for community residents selected for an overweight tendency. A separate trial examined hot-water immersion only in middle-aged people with overweight or obesity.
Who was studied
People with a condition
Overweight
Study result
Participants were selected for overweight tendency; the program was reported as useful for community residents with this tendency, based on a single small RCT.
Open Hot Bath
→
PracticesSwimmingCertaintyLowSourceClinical
Pooled analyses whose study designs were not recorded included overweight or obese sedentary populations and reported increased SPX with exercise.
Study result
Included studies involved overweight or obese sedentary populations; exercise increased SPX.
Open Swimming
→
PracticesMeditationCertaintyLowSourceReview
Significant weight loss and reductions in emotional, external, and overeating at 6-month follow-up in 6 overweight men (single small feasibility study).
Who was studied
People with a condition
Open Meditation
→

What to avoid

Interventions recorded as making it worse1 listed

Highest probability

PracticesFinnish SaunaCertaintyLowSourceClinical
In a quasi-experimental study of 45 considerably overweight men, 40-minute sauna sessions were described as potentially excessive and dangerous; by the fourth session, average blood pressure reached 140/94 mmHg and heart rate reached difficult or maximal-effort ranges. A separate cross-sectional study of 674 people linked high BMI with greater inferred risk of dehydration, but did not measure dehydration as an adverse outcome.
Who was studied
People with a condition
Study result
Authors state 'Sauna sessions lasting 40 minutes could be excessive and dangerous to the health of men who are considerably overweight'; average BP reached stage 1 hypertension range (140/94 mmHg) and HR reached difficult/maximal effort ranges in the fourth session.
Rationale
Authors state 'Sauna sessions lasting 40 minutes could be excessive and dangerous to the health of men who are considerably overweight'; average BP reached stage 1 hypertension range (140/94 mmHg) and HR reached difficult/maximal effort ranges in the fourth session.
Open Finnish Sauna
→

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

Overweight is classified as a metabolic condition involving body weight. It is a health context rather than a single symptom or guaranteed disease outcome, and individual findings should not be interpreted as applying equally to everyone with overweight. Evidence discussed for options such as Tai Chi, MCT Oil, and Psyllium Husk reflects specific study outcomes, not a definition of the condition. A clinician can help place it in an individual health context.

Evidence-backed options

The options studied for overweight do not all target the same outcome. Findings include changes in body weight, BMI, waist circumference, body composition, metabolic flexibility, appetite, cardiometabolic measures, and physical function. Some effects were observed only when an option was combined with structured exercise, such as Spirulina, or with short, high-intensity sprint exercise, as described for L-Leucine.

The research periods varied. MCT Oil was studied at 2 g daily for 2 weeks, with increased fat burning during daily physical activities in sedentary people with a BMI from 25 to less than 30. Tai Chi was evaluated over 12 weeks in 81 overweight male university students, with improvements in flexibility, lower-limb strength, balance, and the 6MWT. An 8-week Bikram yoga study reported reductions in body mass and BMI, while other studies found limited changes in body composition. Green Tea Extract (EGCG) was studied for 60 days in post-menopausal overweight and class I obese women. Cranberry Extract showed a BMI reduction in a subgroup consuming powdered cranberry for more than 8 weeks, among people over age 50 classified as overweight based on BMI.

The findings are not uniformly conclusive. Chlorella has been associated with anthropometric and cardiometabolic outcomes, but the overall certainty was low to very low. Quercetin findings differed by outcome, with reductions in weight and body-fat percentage but no significant effects on several other body-size measures. Alpha-Lipoic Acid (ALA) was not significantly associated with intermediate disease markers in overweight or obese adults. Interpretation depends on the specific outcome, study population, and duration; consultation with a clinician can help place these findings in context.

What to avoid

Finnish Sauna is flagged because prolonged sessions may place substantial cardiovascular strain on men who are considerably overweight. The cited authors state that sauna sessions lasting 40 minutes could be excessive and dangerous to health in this group. By the fourth session, average blood pressure reached 140/94 mmHg, while heart rate reached difficult or maximal-effort ranges.

This concern relates specifically to the duration of the sauna sessions and the observed blood-pressure and heart-rate responses, rather than establishing that all sauna use has the same effect. The finding is also limited to the studied clinical context and does not establish how other session lengths or populations would respond. Anyone with a medical condition should discuss the suitability of sauna use with a clinician.