Abdominal roll of fitness ball
Lie flat on the fitness ball, put your feet flat on the ground, put your hands on your head and open your arms. Reduce the chin to the chest, exhale, contract the abdominal muscles, raise the upper body about 45 degrees, hold it for 2 seconds, and then slowly return to the starting position. In order to keep balance, your feet can be separated more. If it is difficult, you can do it with your feet together.
Traditional belly roll
Lie on your back on the floor with your lower back close to the ground. Put your hands on your head and open your arms. Put your legs flat on the ground and bend your knees. The chin shrinks to the chest, contracts the abdominal muscles, exhales, lifts the upper body, keeps the lower back off the ground for 2 seconds, and then slowly returns to the starting position.
Reverse abdominal roll
Lie on your back on the floor with your lower back close to the ground, put your hands on your sides, raise your legs at 90 degrees to your upper body, cross your legs, and bend your knees slightly. Tighten your abdominal muscles, then exhale, lift your hips slightly, lift your back slightly off the ground for 2 seconds, and then slowly return to the starting position.
Lift your legs and tuck in your abdomen.
Lie on your back on the floor with your lower back close to the ground. Put your hands on your head and open your arms. Raise your legs at 90 degrees to your upper body, cross your legs, and bend your knees slightly. Exhale, contract the abdominal muscles, lift the upper body, keep the lower back off the ground for 2 seconds, and then slowly return to the starting position. Keep your chin down to your chest.