There’s one word you hear in almost all football-related analysis these days: intensity. “It was not a problem of formation, but of energy and of intensity,” said former Manchester United manager Ralf ...

The American Heart Association recommends that adults get "at least 150 minutes per week of moderate-intensity aerobic activity or 75 minutes per week of vigorous aerobic activity" — or a combination ...

If you’ve ever thought to yourself during a workout, wow this is super challenging, a 10 out of 10 for sure, you’ve actually been using RPE (rate of perceived exertion) to measure your exercise ...