High-intensity interval training is one of the biggest trends in fitness, but it has always seemed a bit scary to me. To a mere mortal with achy knees and an aging body, even the acronym — HIIT — ...

The debate about how hard to push during exercise has persisted for decades, with fitness approaches swinging between high-intensity interval training and gentler, steady-state activities. However, ...

Fitness intensity can be one of the most subjective areas of working out. From “rate of perceived exertion” (or RPE) to the famous “runner’s high” or getting “in the zone,” these metrics can, at best, ...

Advances in wearables technology mean more recreational athletes are taking a data-driven approach to their training. Here ...

Many exercise physiologists believe that the intensity of an activity is more important than how long you exercise or how many times you repeat an exercise. But gauging exercise intensity can be ...