The best part ... stair climbing workout that centers around the classic move: the squat. Repeat as many times as you'd like for some extra sweat. How to: Alternate lifting one leg a few inches ...

The best part ... Every time you lift your leg behind your body, pause with it extended for one to two seconds. Walk 60 sec / 2–3 RPE HIIT stair climber circuit This is a HIIT cardio circuit ...