There’s a lot of talk in the exercise world about high intensity interval training (HIIT) lately, which is exactly what it sounds like — alternating episodes of exercise with periods of less intensive ...

High-intensity interval training is one of the best ways to pack a lot of exercise into a short period of time. HIIT workouts are so efficient because they alternate short bursts of very intense ...

In this workout, you’ll walk at an RPE of 2 (easy effort), 3 (moderate), 4 (somewhat hard), and 5 (hard). At RPE levels 2 ...