With lifting weights, why is there different rep ranges for different goals?

Question

The general consensus is 1-5 for strength, 8-12 for hypertrophy, and anything above for indurance. But why?

In: 6

Answer 1

Hypertrophy seems associated with stretching the muscle under load, so if you have higher reps, you have more instances of that stretching, even if the load is lower.

For strength, you want the contracting part of the movement to be the focus, and you want the load to be as high as possible to train the muscle for that purpose. Higher loads means fewer reps.