When training for hypertrophy, the primary goal should be to challenge muscles using weights or other resistance.

“When you're training purely for hypertrophy or mainly for hypertrophy, it's really about challenging muscles using weights or other forms of resistance.”

“In the case of trying to build hypertrophy, or I should say improve hypertrophy, muscle size, oftentimes the best advice that one can give is to don't try to lift weights, but rather to challenge muscles.”

“when training to increase muscle size, to really think, not so much about moving weights, but more about challenging muscles.”