Figure-4 Stretch Lie flat on your back. Raise your legs so your knees are bent at a 90-degree angle. Take your left ankle and cross it over, placing it behind your right knee. Wrap your hands around your right thigh, and gently pull the right knee toward your chest. Keep your core engaged to prevent arching your back. Stop when you feel the stretch and hold for 20 seconds. Lower the right leg back down to the ground. Repeat on the opposite side, placing your right ankle behind your left knee. Do this stretch twice on each side. Image Source: POPSUGAR Photography / Kyle Hartman