Curl-ups (Sit-ups)
What are Curl-ups? Curl-ups are one of the most popular abdominal exercises. Curl-up exercises increase abdominal endurance, which is essential for back support and core stability. Strong abdominal muscles help prevent low-back pain. The curl-up demands that the abdominal muscles lift the upper body off the floor. The hip flexors, of which the iliopsoas is…