Bodybuilding spans recreational resistance training, physique competition, coaching, and broader fitness participation. The available evidence ranges from 2024 U.S. facility estimates to systematic reviews of competitive athletes, training adaptations, mortality associations, and anabolic-androgenic steroid use; these measures are related but are not interchangeable.
Key Bodybuilding Statistics
The following highlights summarize distinct, broadly useful measurements:
- In 2024, 77 million U.S. people age 6 and older held fitness-facility memberships.
- In 2024, fitness facilities served nearly 96 million U.S. customers age 6 and older, including members and other access routes.
- In 2024, 24.9% of the U.S. population age 6 and older held a fitness-facility membership.
- In 2024, 32.1% of U.S. fitness-facility members trained with dumbbells or free weights.
- In 2024, 22.6% of U.S. fitness-facility members worked with a personal trainer.
- In 2024, 32.3% of U.S. fitness-facility members participated in small-group training.
- A systematic review of studies published from 2000 through June 2021 found 16 studies of competitive-bodybuilding body composition, including six longitudinal preparation studies.
- During general preparation, female competitive bodybuilders had body-fat levels from 15.3% to 25.2% across the reviewed studies.
- Near competition, male competitive bodybuilders had body-fat levels from 5.8% to 10.7% across the reviewed studies.
- In every reviewed study comparing preparation time points, competitive bodybuilders reduced relative body fat by 30% to 60%.
- In a case series, eight competitive physique athletes had estimated skeletal-muscle mass from 19.6 to 60.4 kg.
- A resistance-training meta-analysis estimated 4.6% whole-muscle hypertrophy across included studies available through February 2018.
- The same meta-analysis estimated 43.3% whole-muscle strength gains across included resistance-training studies.
- A mortality review found resistance training was associated with 15% lower all-cause mortality risk among nonclinical adults.
- Another review found resistance training alone was associated with 21% lower all-cause mortality among adults in included studies.
- A global review estimated 3.3% lifetime nonmedical anabolic-androgenic steroid use across populations represented in 187 studies.
- The global review estimated 6.4% lifetime AAS use among males in its included studies.
- A 2024 review estimated 16.8% lifetime AAS use among female bodybuilders in its pooled subgroup.
Contents
- Key Bodybuilding Statistics
- Bodybuilding Participation and Gym Equipment Use
- Bodybuilding Coaching and Fitness Training Trends
- Competitive Bodybuilding Body-Fat Statistics
- Physique-Athlete Muscle-Mass Data
- Resistance-Training Strength and Hypertrophy Statistics
- Bodybuilding Health and Anabolic-Steroid Statistics
Bodybuilding Participation and Gym Equipment Use
Bodybuilding does not have a single population-level participation count in the supplied U.S. industry data. The Health & Fitness Association’s 2025 U.S. Health & Fitness Consumer Report uses a 2024 rolling 12-month survey, and its facility measures provide context rather than a census of bodybuilders.
| U.S. fitness-facility measure | 2024 result | Definition or limitation |
|---|---|---|
| Members, age 6+ | 77 million | Membership, broader than bodybuilding |
| Total customers, age 6+ | Nearly 96 million | Includes members, aggregators, pay-as-you-go, insurance, and employer programs |
| Membership penetration, age 6+ | 24.9% | Facility membership, not bodybuilding participation |
| Total customer penetration, age 6+ | 31.0% | Includes non-members using other access routes |
Source: Health & Fitness Association, “How 77 Million Fitness Members Work Out”.
Membership rose 5.6% in 2024 and 5.8% in 2023, according to the same HFA industry survey. Those year-over-year estimates describe facility membership, not the number of people following bodybuilding programs.
Equipment-use data show how resistance training fits into facility activity. In 2024, 43.4% of members used treadmills, 32.1% trained with dumbbells or free weights, and 26.6% used resistance machines; resistance-machine use was 31.4% in 2021.
The same survey reported elliptical use of 18.8% in 2024, down from 23.2% in 2021. Yoga participation rose from 20.2% to 21.8% among members from 2023 to 2024, while Pilates reached 8.1% and pickleball rose from 3.3% in 2021 to 8.1% in 2024.
Bodybuilding Coaching and Fitness Training Trends
Coaching and structured training are common in the broader fitness market, although the HFA data do not identify bodybuilding-specific coaching. In 2024, 22.6% of U.S. facility members worked with a personal trainer and 32.3% took part in small-group training.
- Women represented an estimated 7.3 million personal-training participants in the United States in 2024, and women’s participation increased 15.9% year over year.
- The average member completed 21 personal-training sessions in 2024, compared with 28 sessions in 2019.
- Small-group training averaged 23 sessions per member in 2024.
- Members from households earning above $75,000 represented just over half of all U.S. fitness-facility memberships in 2024.
These figures come from the HFA’s 2024 consumer measurements and should be read as industry context. Personal training, small-group sessions, income composition, and bodybuilding coaching are overlapping categories, not identical ones.
Source: Health & Fitness Association, “How 77 Million Fitness Members Work Out”.
Competitive Bodybuilding Body-Fat Statistics
Competitive physique data describe selected athletes at specific preparation stages, not universal targets. A systematic review covering studies published from 2000 through June 2021 included 16 competitive-bodybuilding body-composition studies, six of which provided longitudinal competition-preparation data.
| Competitive group and phase | Reported body-fat range | Measurement scope |
|---|---|---|
| Female, general preparation | 15.3%–25.2% | Across included studies and methods |
| Male, general preparation | 9.6%–16.3% | Across included studies and methods |
| Female, near competition | 8.1%–18.3% | Across included studies and methods |
| Male, near competition | 5.8%–10.7% | Across included studies and methods |
Every study that compared preparation time points found a 30% to 60% reduction in relative body fat. The review emphasizes that divisions, preparation stages, body-fat methods, sex, and sample selection vary, so the ranges should not be treated as standardized thresholds or prescriptions.
Source: PubMed, “Body Composition of Competitive Bodybuilders”.
Physique-Athlete Muscle-Mass Data
A separate case series examined skeletal muscle in eight competitive physique athletes across bodybuilding, 212 bodybuilding, bikini, and physique divisions. Ultrasound-derived estimates are useful for describing that small sample, but they are not population norms.
- The eight competitive athletes had estimated skeletal-muscle mass from 19.6 to 60.4 kg.
- Their skeletal-muscle indices ranged from 7.2 to 17.9 kg/m², where the index is skeletal muscle mass divided by height squared.
- Four recreationally resistance-trained or non-resistance-trained comparison participants had estimated skeletal-muscle mass from 16.1 to 32.6 kg.
- The comparison participants’ skeletal-muscle indices ranged from 5.8 to 9.3 kg/m².
The comparison group was very small and mixed in training status. These ranges therefore show the measurements observed in the case series rather than a defined difference applicable to every competitive or recreational bodybuilder.
Source: PubMed, “Skeletal muscle mass in competitive physique-based athletes”.
Resistance-Training Strength and Hypertrophy Statistics
Resistance-training research supplies outcome measures relevant to bodybuilding, but included interventions and tests differ. A meta-analysis of studies available through February 2018 estimated separate changes at whole-muscle and individual-fiber levels.
| Outcome level | Hypertrophy or strength estimate | Interpretation |
|---|---|---|
| Whole muscle hypertrophy | 4.6% | Pooled estimate across heterogeneous studies |
| Individual-muscle-fiber hypertrophy | 7.0% | Not interchangeable with whole-muscle change |
| Whole-muscle strength | 43.3% | Pooled estimate across varied strength tests |
| Individual-fiber strength | 19.5% | Distinct from whole-muscle strength |
| Type 1 fiber size | 6.7% | Fiber-specific estimate |
| Type 2A fiber size | 12.1% | Fiber-specific estimate |
Type 1 muscle-fiber specific tension increased significantly (p=0.013), while Type 2 specific tension did not increase significantly (p=0.23). The non-significant result does not prove that no effect exists; it reports the result of the pooled analysis.
A later systematic review and meta-analysis compared variable and traditional resistance training in 17 studies involving 491 healthy adults aged 18–37. It found no significant lower-body strength difference (SMD −0.10; p=0.46) and no significant upper-body strength difference (SMD −0.17; p=0.14).
Sources: PubMed, “Resistance training induced changes in strength and specific force” and PubMed, “Comparing the effects of variable and traditional resistance training”.
Bodybuilding Health and Anabolic-Steroid Statistics
Health outcomes require careful interpretation because the mortality evidence concerns resistance training broadly, not bodybuilding as a competitive identity. A systematic review covering studies through June 6, 2021 found that any resistance training was associated with lower mortality risk among nonclinical adults.
- Any resistance training was associated with 15% lower all-cause mortality risk (RR 0.85, 95% CI 0.77–0.93), based on six pooled studies.
- Any resistance training was associated with 19% lower cardiovascular mortality risk (RR 0.81, 95% CI 0.66–1.00), based on four pooled studies.
- Any resistance training was associated with 14% lower cancer mortality risk (RR 0.86, 95% CI 0.78–0.95), based on five pooled studies.
- The review estimated a maximum 27% all-cause mortality-risk reduction at about 60 minutes of resistance training per week (RR 0.74, 95% CI 0.64–0.86), with diminishing reductions at higher volumes.
A separate meta-analysis included 11 studies and 370,256 participants, with mean follow-up of 8.85 years. Resistance training alone was associated with 21% lower all-cause mortality (HR 0.79, 95% CI 0.69–0.91), while resistance training combined with aerobic exercise was associated with 40% lower all-cause mortality (HR 0.60, 95% CI 0.49–0.72); the cardiovascular association for resistance training was borderline (HR 0.83, 95% CI 0.67–1.03).
These are observational or pooled associations and do not prove that bodybuilding or resistance training caused the outcomes. Sources: PubMed, “Resistance Training and Mortality Risk” and PubMed, “The association of resistance training with mortality”.
Anabolic-androgenic steroid prevalence also varies sharply by population and method. A global review of 187 studies reporting 271 lifetime-prevalence rates estimated nonmedical AAS use at 3.3% overall, 6.4% among males, and 1.6% among females; the estimates had very high heterogeneity.
| Population | Lifetime AAS-use estimate | Review scope or limitation |
|---|---|---|
| Global included populations | 3.3% (95% CI 2.8%–3.8%) | 187 studies; I²=99.7% |
| Males | 6.4% (95% CI 5.3%–7.7%) | I²=99.2% |
| Females | 1.6% (95% CI 1.3%–1.9%) | I²=96.8% |
| Female bodybuilders | 16.8% (95% CI 11.0%–24.9%) | 2024 review subgroup; I²=44% |
| Female athletes or recreational gym users | 4.4% (95% CI 1.2%–15.1%) | 2024 review subgroup; I²=93% |
| Female general-population or other samples | 1.4% (95% CI 0.4%–4.7%) | 2024 review subgroup; I²=96% |
Among women age 18 and older, the 2024 review pooled lifetime AAS use at 4% (95% CI 2%–9%) across 18 studies. Female bodybuilders had significantly higher pooled use than the other subgroup in meta-regression (p=0.011), but the estimate is not a census and does not establish causation or individual risk.
Sources: PubMed, “The global epidemiology of anabolic-androgenic steroid use” and PubMed, “What is the prevalence of anabolic-androgenic steroid use among women?”.