Exercise 1: Bodyweight Squat
Stand as tall as you can with your feet spread slightly wider than shoulder-width apart. Hold your arms straight out in front of your body at shoulder level, so that your arms parallel to the floor [A]. Keep your torso as upright as you can for the entire movement, with your lower back slightly arched. Brace your abs, and lower your body as far as you can by pushing your hips back and bending your knees [B]. Pause, then push yourself back to the starting position. That's one repetition. Do 15 to 20 repetitions.