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 ...
Add Yahoo as a preferred source to see more of our stories on Google. There are actually three phases of each rep: the concentric (the “up” portion), the eccentric (the “lowering” portion), and the ...
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