Stronger arms after 40? A celebrity trainer explains how to do it right—no ego lifting, just smarter full-body training.

This is known as “antagonistic pairing,” as one muscle group contracts to assist one phase of movement while the other relaxes, and the opposing muscle then contracts to assist in returning to ...

Keeping your right arm straight, lower the left dumbbell to your chest then press it back up. Do that twice. Then keep the ...

The antagonist is the opposing muscle group during the action — in this case, the hamstrings along the backs of the legs. When you bend your knee, the hamstrings become the agonist and the quads ...

Supersets are a form of exercise where you focus on working opposing muscle groups back to back with little rest in between. An example of a superset would be doing one set of 10 push-ups focusing ...

This traditional superset workout pairs opposing muscle groups, like back and chest. Rest for 90 seconds after each superset. And perform three rounds of each superset before moving on to the next.

We’ve covered contrast training before – and its ability to build strength and explosive power by combining heavy and dynamic exercises – but Sipes' take on the method was aimed squarely at building ...

How everyday habits create physical misalignment. Muscle imbalance occurs when one muscle group becomes disproportionately stronger or tighter than its opposing counterpart. This seemingly minor ...

To treat sore, tight hamstrings, it’s usually helpful to look at the opposing muscle group (a.k.a. your quads), or adjacent muscles like your gluteus maximus, to figure out where the problem lies.