Stand in place and jog on the spot, bringing your knees up towards your chest as high as you can.
Stand with your feet shoulder-width apart and lower your body as if you're sitting back into a chair, keeping your chest up and your knees behind your toes.
Start in a plank position with your hands shoulder-width apart and your body in a straight line from head to heels.
Begin in a push-up position, then lower down onto your forearms. Keep your body in a straight line from head to heels, engaging your core muscles to hold the position.
Stand with your feet together and your arms by your sides. Jump your feet out to the sides while simultaneously raising your arms overhead.