Start standing with your arms by your sides and your feet hip-distance apart.
Quickly jump both feet outwards so they are wider than your hips. At the same time, raise your arms upwards and outwards from the sides of your body so that your hands almost meet directly above your head.
Quickly jump both of your feet inward, and simultaneously lower your arms to return to the starting position.
This counts as one rep.
Repeat for 10 reps.
Repeat this superset for a total of three rounds, then take one minute of rest before starting the circuit.