The Claim
When strength is tested using machine-based exercises, machine-based training is associated with greater strength gains compared to free-weight training, with an effect size of -0.784 (95% CI: -1.223, -0.344), indicating that strength improvements are specific to the training modality used for testing.
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 train using weight machines and then test your strength on machines, you’ll get stronger than if you trained with free weights — but only because the test matches the training. It’s like practicing basketball shots from the free-throw line and then being tested there: you’ll do better than if you practiced elsewhere.
See the scientific wording
When strength is tested using machine-based exercises, machine-based training is associated with greater strength gains compared to free-weight training (effect size: -0.784; 95% CI: -1.223, -0.344), indicating that strength improvements are specific to the training modality used for testing.
What the research says
1 studyIf you train with machines, you get stronger on machines; if you train with free weights, you get stronger with free weights. The study shows that each type of training works best for the kind of test it matches.
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.