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, ...

Master the two simple scales that pro lifters use to measure intensity, avoid plateaus, and ensure every set counts.

A running coach provides a beginner’s guide on RPE and explains whether the scale is worth using to guide your runs ...

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, ...