To do a star jump, stand tall with your arms by your side and knees slightly bent. Jump up, extending your arms and legs out into a star shape in the air.
Land softly, with your knees together and hands by your side. Keep your abs tight and back straight during the exercise.
Stand in a split stance, with your right leg forward and left right back. Slowly bend the knees, lowering into a lunge, until both legs are nearly at right angles.
Keeping the weight on your heels, push back up to starting position. Keep your back straight and don't let your knees extend over your toes.
As a less energetic alternative, do some squats. Stand with your feet shoulder-width apart and your hands down by your sides or stretched out in front for extra balance.
Lower yourself by bending your knees until they're nearly at a right angle, with your thighs parallel to the floor. Keep your back straight and don't let your knees extend over your toes.
To do a burpee from a standing position, drop into a squat with your hands on the ground. Kick your feet back into a push-up position. Jump your feet back into a squat and jump up with your arms extending overhead.
For an easier burpee, don't kick out into the push-up position and stand up instead of jumping.
Lie down on your back, knees bent and hands behind your ears. Keeping your lower back pressed into the floor, raise your shoulder blades no more than 3 inches off the floor and slowly lower down.
Lie on your front propped up on your forearms and toes. Keep your legs straight and hips raised to create a straight and rigid line from head to toe.
Your shoulders should be directly above your elbows. Focus on keeping your abs contracted during the exercise. Hold this position for 5 to 10 seconds and repeat 8 to 10 times.
Place your hands underneath your shoulders with your arms fully extended, palms flat and fingers facing forward. Keep your legs straight and knees off the floor.
Bend your arms at your elbows, lowering your chest until it's 5cm above the floor and your elbows reach 90 degrees.
Keep your back and legs straight at all times, as if your body was a plank. Try not to bend or arch your upper or lower back as you push up. Push back up and repeat.