Bodybuilders train their muscles to the point of failure, meaning it’s difficult to do more than a set number of exercises. Isometric exercises however can be performed when the muscle is fatigued – and without the risk of injury.
Doubters in isometric effectiveness only need to go to the old Charles Atlas Training Courses, which were largely isometric exercises. Isometric exercises have several benefits for both strength athletes and bodybuilders – including advantages not possible through regular weight training.
Isometrics allows bodybuilders to recruit nearly all the muscle fibers during a maximal isometric contraction – something that doesn’t happen with regular eccentric and concentric (down and up) repetitions. Any bodybuilder knows, the more muscle you can recruit the more damage you can inflict and the more growth can occur. This leads to a greater than normal increase in strength. In as little as 10-weeks athletes have been proven to show strength gains of 14-40% with isometric training.