S2: Side plank
Key instructions
Side plank on the floor/mat:
Hold the 'side plank' position with your left or right forearm, keeping your legs and feet straight. Tighten your core and tuck your bottom in.
If this is too difficult, bend your top leg and place your foot on the floor in front of you (see video).
Sets x reps
45 sec to 1 min per side