The Claim
Resistance training targeting specific muscle groups induces hypertrophy in the recruited muscles (increasing volume by 2.2% to 17.7%) and concurrent atrophy in nonrecruited muscles, such as the adductor magnus and soleus (decreasing volume by 1.5% to 2.4%), over a 10-week intervention period.
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 do targeted strength training for a few weeks, the muscles you work will grow bigger, but the muscles you don't use during those exercises might actually shrink a little bit. This happens because your body adapts specifically to the exact movements you're doing.
See the scientific wording
Resistance training targeting specific muscle groups leads to hypertrophy in recruited muscles (+2.2% to +17.7% volume increase) while simultaneously causing atrophy in nonrecruited muscles like the adductor magnus (−1.5%) and soleus (−2.4%) over a 10-week period.
What the research says
1 studyThe study confirms that when you train specific muscles for 10 weeks, those muscles grow, but untrained muscles in the same body actually shrink slightly.
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.