Features

Perform two circuits of exercises, each one for 40 seconds, with 20 seconds rest in between. Complete as many repetitions as possible in the time.

7. Single-legged squat. Standing on one leg, hands on hips, lean forward slightly as you lower yourself slowly to a comfortable position. Divide your time equally between legs.

For a third, strength-building circuit, place your arms behind your back and perform the exercise more slowly - down for a count of two, up for a count of three.