Our expert says:
more or less, yes. If you want to bulk up, build bigger muscles, then the idea is heavy lifting. And when you lift heavy, the implication is that you can't lift often, so you do few reps with very big weights.
The opposite end of the spectrum sees the shaping/toning objective, and that's where you lift lighter, but higher volume. So you find a weight that you can lift say 25 times before absolute fatigue, and you do 3 sets of 15 reps. As an example.
It's a different kind of 'stress' and it produces different responses.
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