People might respond differently to how much weight training they do, but we can't say for sure because the studies done so far aren't clear enough.

People respond differently to the same workout routine, and this study shows we still don’t fully understand why—even though we checked one possible reason (muscle type), it didn’t explain the differences.

The study shows that some people don’t gain muscle with light exercise, but do when they do more sets. This supports the idea that people respond differently to workout amounts.

The study looked at muscle growth from different workout weights and found similar gains when total work was the same, but it didn’t look at how much people varied individually—so it supports the idea that we can’t yet say for sure if people respond very differently.

The study looked at how different numbers of exercise sets affect chest muscle growth and found no big difference, but it didn’t look closely at how each person responded differently—so it supports the idea that we still don’t fully understand individual differences.

The study looked at how different workout amounts affect muscle growth in women, but it didn’t look closely at how each person responded differently, which means we still can’t be sure how much people vary in their responses.