What Are Eccentric and Concentric Contractions? Eccentric contractions occur when a muscle lengthens under load, such as lowering a dumbbell during a biceps curl. Concentric contractions happen when ...

Banging out reps is pretty straightforward, generally speaking. Lift the weight, lower the weight, repeat. But if you break down the anatomy of a repetition, there’s more going on than meets the eye.

Understand the science of lifting versus lowering to optimize your training and break through your next plateau. Banging out reps is pretty straightforward, generally speaking. Lift the weight, lower ...