[Weight-bearing sit-ups] mainly exercises abdominal muscles

[Weight-bearing sit-ups] mainly exercises abdominal muscles. Sit on an exercise ball with your feet flat and slowly slide the ball forward while leaning back until your butt is in the air. Hold a barbell in both hands and stretch it as far back as possible, lowering your upper back as much as possible to maximize the stretch for your abdominal muscles. Action essentials: tuck your abdomen and then lift your upper back, place the barbell above your head, contract at the highest point, and slowly return to the starting position. You can also practice with bare hands first and gradually increase the intensity.