Exercise 101: Sit-Ups
Name of Exercise—Bent knee sit-up
Type of Exercise—Multi-joint
It is important to perform a posterior pelvic tilt prior to performing the crunch. To do this, press your lower back into the floor while curling your pelvis slightly upward. This will engage your abdominal muscles from the start and make the movement more efficient. Place your hands across your chest or down at your sides rather than behind your head.
American College of Sports Medicine
President's Council on Fitness, Sports & Nutrition
Health Canada Physical Activity
Bent-Knee Sit-up/Crunches. American Council on Exercise website. Available at: http://www.acefitn.... Accessed December 4, 2012.
Last reviewed December 2012 by Brian P. Randall, MD