FitProven
Fitness Claims
Request a claimGrip strength predicts how long you will live
100% Strongly SupportedLarge prospective cohorts and meta-analyses covering millions of people consistently find that weaker handgrip strength predicts earlier dea...
Full range of motion is better than partial reps for hypertrophy
52.9% Insufficient EvidenceA common training recommendation is that exercises should be performed through a full range of motion rather than partial repetitions to max...
Interval walking training beats continuous walking for fitness and health
51.2% Mixed EvidenceThe viral "Japanese walking" method — alternating 3 minutes fast with 3 minutes slow — is unusual among fitness trends in having a real tria...
Static stretching before training reduces strength and power output
41.6% Mixed EvidenceCoaches, textbooks and popular training advice widely hold that holding a static stretch before a workout or competition acutely impairs sub...
Training each muscle 3+ times per week is better than once
38% Weakly SupportedThe claim is that training each muscle group with a higher frequency (3 or more times per week) produces greater hypertrophy than a traditio...
Static stretching before exercise prevents injuries
0% Not SupportedA widespread belief in fitness that performing static stretching before exercise reduces the risk of musculoskeletal injuries during the act...
Training to muscular failure maximizes muscle hypertrophy
0% Not SupportedThe claim that taking every set to complete muscular failure (inability to complete another rep) is necessary or optimal for maximizing musc...