STAIR SPRINT

MUSCLES WORKED: LEGS, GLUTES, CORE (MORE THAN YOU THINK)

Your core is on fire and you’ve hit some tricky movement patterns. Let’s end it by keeping things simple and ramping up your heart rate. Sprint up the stairs, then walk or jog back down until your time’s up. Don’t skip any stairs: make sure that a foot hits each step. Try to run on the balls of your feet.