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, ...

Whether you’re a seasoned cyclist when it comes to structured training or brand new to following a plan, you might be wondering if you’re working hard enough. It’s an easy question to ask, especially ...

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, ...