The Claim
Dynamic external resistance training (such as free weights and machines), accommodating resistance training (such as isokinetic devices), and isometric resistance training all lead to significant muscle hypertrophy in the quadriceps femoris and elbow flexors, with no current evidence indicating that one mode is superior to the others for maximizing muscle growth.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Lifting weights, using machines, or doing static holds all seem to build leg and arm muscles just as well — there's no proof that one way is better than the others for getting bigger muscles.
See the scientific wording
Dynamic external resistance training (e.g., free weights and machines), accommodating resistance (e.g., isokinetic devices), and isometric resistance training all appear to produce significant muscle hypertrophy in the quadriceps femoris and elbow flexors, with no current evidence favoring one mode over another for maximizing muscle growth.
What the research says
1 studyThe study looked at different types of strength training—like lifting weights, using machines, and pushing against immovable objects—and found they all build muscle equally well in the arms and legs.
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.