The Claim
Individuals who train with free weights demonstrate significantly greater improvements in free-weight strength tests (SMD: -0.210, p=0.023), while those who train with machines show a trend toward greater gains in machine-based strength tests (SMD: 0.291, p=0.064), indicating that practice of a specific movement pattern enhances performance in that exact task.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
If you lift free weights, you'll get better at lifting free weights. If you use machines, you'll get better at using machines. Practicing the exact same movement makes you better at that movement.
See the scientific wording
Strength gains are specific to the training modality: individuals who train with free weights show significantly greater improvements in free-weight strength tests (SMD: -0.210, p=0.023), while those who train with machines show a trend toward greater gains in machine-based tests (SMD: 0.291, p=0.064), indicating that practice of a specific movement pattern enhances performance in that exact task.
What the research says
1 studyPeople who lift free weights get better at lifting free weights, and people who use machines get better at using machines — the study proves this. It’s like practicing basketball makes you better at basketball, not soccer.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.