I’ve been a certified personal trainer (C.P.T.) for 15 years. In this decade-and-a-half period of time, I’ve been lucky to work with a wide range of people. This includes pro athletes of all levels, ...

When you lift a weight, how many times should you lift it? Supposedly, there’s a correct “rep range” to use to build strength, and a different rep range to build muscle size, or endurance, or to “tone ...

To boost your running performance, you consider strength training, but now you’ve got two major questions. Is that effort really necessary? And should I do high reps at a lower weight or low reps at a ...

I’ve been hyperaware of overtraining ever since I suffered a pelvic stress fracture a decade ago. The injury came from excessive exercise and a lack of education around nutrition and recovery, but the ...

Reps & Sets works on iPad, iPhone, and Apple Watch. Reps & Sets 26 is a brand-new strength training app designed exclusively for iPhone, iPad and Apple Watch. It was developed by a long-time Cult of ...