twisting knees-in-air sit-ups

Twisting knees-in-air sit-ups are a variation of the traditional sit-up that targets the abs and obliques. To perform this exercise, lie on your back with your knees bent and feet flat on the ground. Place your hands behind your head or across your chest, contract your abs, and lift your shoulder blades off the ground. As you come up, twist your upper body to one side and bring your opposite knee to your chest. Lower back down and repeat on the other side, twisting your upper body in the opposite direction as you bring your other knee to your chest. This exercise helps to strengthen the rectus abdominis, obliques, and hip flexors while improving overall core stability. It can also help to improve spinal mobility and posture. To increase the challenge, hold a weight plate or dumbbell at your chest or perform the exercise on a decline bench.