Sit-ups~How to exercise the upper abdominal muscles

Lie on your back, bend your knees 90 degrees, open your elbow joints horizontally, exhale and lift your chest until your shoulder blades leave the mat. Do not hold your breath, inhale and restore. .

Don’t hold your head tightly with your hands, put them next to your ears, or gently drag your head, or put them on your chest. Don’t use force on your back. The upper body is mainly driven by the contraction of abdominal muscles. Do 4 sets of 20 reps each next day (or until failure) and rest for one minute between sets.