Situps work the rectus abdominis, transverse abdominis, and obliques in addition to your hip flexors, chest, and neck. They promote good posture by working your lower back and gluteal muscles. With a larger range of motion, situps target more muscles than crunches and static core exercises.
Are straight leg sit ups better?
Beginners will probably find that the straight-leg version is a better exercise because they can get the full range of motion. If you have very strong abs the bent-knee version will probably be a better challenge. Electromyographic study of duration of muscle activity in sit-up variations.
What muscles do straight leg crunches work?
The main muscles worked with the vertical leg crunch include the rectus abdominis and external obliques. You’ll also passively work the hip flexors, internal obliques, and deep core flexors, like the transverse abdominis, when exhaling during the movement.
How many crunches should I do a day?
How many crunches should an individual do every day? 10-12 repetitions and three sets of crunches will be good enough. In addition, you may do three sets of two or three variations to engage the other muscles in the stomach.
How do I keep my legs down during sit ups?
Place your hands behind your head, lightly touching the back of your skull. Bend your knees and plant your feet about hip-distance apart. Exhale and engage your abdominal muscles by pulling your belly button in toward your spine. Keep this engagement as you roll up as high as possible.
Can you do crunches with straight legs?
You can perform straight-leg crunches by lying face up on the floor with your legs straight and then moving your upper body as you would for a standard bent-knee crunch. Alternatively, lie on your back, raise your legs so they’re perpendicular to the floor and then perform the standard crunching motion with your torso.