Andrew Huberman· PhD
some of the most brutal workouts I've ever done were in what I would consider a high repetition range-- 15 to 50. Actually, I went up to Oregon to watch the International Track and Field Championships. We went by to Cameron Haynes's place-- the Cameron Haynes-- and he and his trainer put us through a workout that was 25 to 50 repetitions per set, and it was done in circuit, and it was brutal.