Interactive evidence explorer based on 137 systematic reviews (>30,000 participants). Currier et al., Med. Sci. Sports Exerc., 2026;58(4):851–872. DOI: 10.1249/MSS.0000000000003897
Compared with no exercise, RT improved strength, hypertrophy, power, endurance, contraction velocity, and several physical function outcomes. Some outcomes — including stair climbing, walking performance, agility, and functional reach — had insufficient data, and SPPB was not improved versus control. Click a card to learn more.
The Position Stand found that nontraditional forms of RT also produce meaningful benefits. The following modalities all improved at least one primary outcome vs. no exercise:
Improved strength, hypertrophy, power, endurance, gait speed, balance, chair stand, TUG, contraction velocity, and multicomponent function.
Improved strength and hypertrophy. Often time-efficient and well-tolerated.
Improved strength, hypertrophy, and multicomponent function. Accessible, portable, and effective.
Improved strength, endurance, balance, and multicomponent function. Critical for adherence and accessibility.
Improved strength, jumping, and running performance. Useful for athletic populations.
Strength improved in the untrained contralateral limb. Relevant for rehabilitation settings.
Each cell shows whether manipulating that variable enhanced the outcome vs. standard RT. Few RT prescription variables consistently enhanced primary adaptations beyond standard RT. Many were indeterminate or understudied.
| Variable | Strength | Hypertrophy | Power |
|---|
For most physical function tests (gait speed, TUG, chair stand, balance), simply performing RT was sufficient. Few prescription variable comparisons had adequate data to draw conclusions.
Power training (fast concentric phase) was the most clearly supported technique for enhancing multicomponent function, SPPB, and walking performance versus standard RT.
All improved with standard RT vs. no exercise. Insufficient evidence to determine whether specific load, frequency, or technique modifications further improve these outcomes.
Select your primary training goal. The recommendations below reflect variables that significantly enhanced each outcome based on meta-analytic evidence from this Position Stand.
Each recommendation is derived from Table 6 of the Position Stand: variables that enhanced the outcome vs. standard RT.
The authors explicitly state: individualizing programs to increase RT participation is more important than conforming to specific prescription criteria. Minimal doses of RT produce substantial strength, hypertrophy, and functional gains. Nearly 60% of American adults perform no muscle-strengthening exercise. Doing something beats doing nothing optimally.
These factors are often debated in training culture but showed no significant benefit when tested in controlled systematic reviews. This doesn't mean they're useless for all people in all contexts, but the pooled evidence doesn't support them as optimization levers.
These null findings are liberating for practitioners and patients. They reduce the perceived complexity of RT prescription. If a patient finds machines more comfortable than free weights, or prefers morning over evening sessions, or can't train to failure due to joint issues, these data say: that's perfectly fine. The gains are equivalent.
Key translational insights from the Position Stand, contextualized for metabolic health and sarcopenia-focused clinical practice.
Training to momentary muscular failure does not enhance strength, hypertrophy, or power. The authors recommend a target of 2 to 3 repetitions in reserve (RIR). This is especially relevant for older adults, for whom training to failure may be inadvisable because of potential vascular concerns and greater injury risk from form breakdown.
A wide load range can support similar hypertrophy when effort is adequate and volume is sufficient. This means lighter loads with more reps can build muscle comparably to heavier loads in many studied conditions. Clinically critical for patients with joint limitations or fear of heavy weights.
Voluntary strength (1RM) showed a dose-response to load. Loads at or above 80% 1RM optimized strength gains. This follows the principle of specificity: to lift heavier, you must practice lifting heavier.
Power RT (performing the concentric phase as quickly as possible) was the most clearly supported technique for enhancing SPPB, walking performance, and multicomponent function versus standard RT. For older adults at risk of falls and functional decline, intentionally fast concentric movements are an evidence-based upgrade.
Higher volume (10+ sets per muscle group per week) enhanced hypertrophy. Diminishing returns appear beyond approximately 18 to 20 weekly sets. For strength, 2 to 3 sets per session is the best-supported volume range in Table 6.
Periodization (linear, undulating, block) was NOT significantly superior to nonperiodized programs for hypertrophy. For strength, the impact could not be determined. With appropriate progressive overload, periodization adds complexity without clear benefit for most trainees.
In an analysis of over 38,000 participants (>11,000 older adults), RT did not increase serious adverse event risk. Nonfatal cardiovascular complications were reported less often during RT than during aerobic exercise in the cited evidence.
Complete range of motion enhanced strength gains. For hypertrophy, the data were insufficient to determine ROM's effect — current evidence cannot establish whether full or partial ROM is superior for muscle growth. Clinically, full ROM is still recommended for functional carryover.
Healthy adults should perform progressive resistance training with high effort (measurable via RPE/RIR scales), at least twice weekly, engaging all major muscle groups. Many forms of RT work. The best program is one the individual will actually do consistently. Participation trumps optimization.