Sprints

How to do it

1. Stand in an athletic split stance with one foot ahead of the other, knees bent, and your weight forward on the balls of your feet.
2. Lean slightly forward from your ankles to set up an explosive start.
3. Drive your arms and legs hard to accelerate to top speed.
4. Pump your arms forward and back and lift your knees as you run all-out.
5. Hold maximum effort for the interval, then ease off and recover.