According to Aaron Trotter, personal training operations manager at Anytime Fitness, building muscle comes down to one thing: pushing your muscles hard enough to make them adapt. “Muscle doesn’t care ...

While there’s no one-size-fits-all approach to the best routine, there are some best practices to keep in mind.

It was a Friday evening at Academy USA, a training facility in Glendale, Calif., and the courts were full of kids running ...