Strength training
Can you build muscle with light weights?
The short answer
Yes. A meta-analysis found similar muscle growth across different weights when sets were taken to muscular failure. Training heavier generally led to greater improvements in maximal strength.
What does this mean for your training?
A light dumbbell is not automatically a bad choice. The weight does need to be challenging enough. If your main goal is getting stronger in heavy lifts, practising with heavier loads is relevant.
What does this not prove?
The sets studied were taken to muscular failure. That does not mean every set in every training programme must go to failure. Nor do the results automatically apply to every extremely light load or to people with injuries.
