Bodybuilders and fitness fanatics can build up three times as much muscle mass and five times more strength if they take three seconds to do their return movements instead of just one second when doing reps. Brazilian sports scientists at the Universidade Federal de Sao Paulo write about this in the International Journal of Applied Exercise Physiology.
Study
The researchers got 12 healthy men, all experienced strength trainers, to train their biceps by doing Scott curls twice…