Zasiorsky Doesn't Like 8-9 RM?

I’m reading Zatsiorsky’s book, Science and Practice of strength training where it was written that the best loads for hypertrophy are 5-7RM and 10-12RM.

Anyone know why Zatsiorsky view 8-9 RM is sub-optimal for hypertrophy?

Why not email him and find out? He’s a professor at Penn State, his email is listed on the Kinesiology faculty page.


fahd, let us know what he says.

some people say that 8-9 is the optimal rep range for hypertrophy because it’s in the middle, but if both 5-7 and 10-12 are used then it covers the middle and more.