The Claim
Resistance training produces strength improvements that are specific to the exercise performed, with greater 10-repetition maximum gains occurring in the muscle groups targeted by each specific exercise type.
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.
When you do a particular exercise, you get stronger mainly in the muscles you used to do that exercise - not necessarily in other muscles.
See the scientific wording
Strength improvements from resistance training are specific to the exercise performed, with greater 10-repetition maximum gains in the muscle groups targeted by each exercise type
When you do a specific exercise like bicep curls, the weight pulls directly on your biceps without help from other muscles, making those muscles work harder and grow bigger (10.1519/JSC.0000000000003234). This bigger muscle, plus your brain learning to use those muscles more efficiently during that exact movement, makes you stronger at that exercise but not necessarily at others.
What the research says
1 studyStudy: Single-Joint Exercise Results in Higher Hypertrophy of Elbow Flexors Than Multijoint Exercise
When you train one specific exercise, like bicep curls, you get stronger at that exact movement—not necessarily at other exercises, even if they use similar muscles. This study proved it by showing people got better at the exercise they practiced most.
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.