Straight-Leg Sit-Up
Strengthen your core with Straight-Leg Sit-Ups! A challenging bodyweight exercise for abs and hip flexors.
The Straight-Leg Sit-Up is a compound exercise that mainly works the core, with help from the glutes & hips. No equipment needed: it uses just your bodyweight.
Optional Equipment
Straight-Leg Sit-Up Muscles Worked
Primary
Abdominals (rectus abdominis)
Secondary
Hip Flexor (iliopsoas); Long Thigh (sartorius)
Straight-Leg Sit-Up Variations and Alternatives
How to do the Straight-Leg Sit-Up
Begin by lying flat on your back on a mat with your legs extended straight out in front of you. Place your arms extended overhead on the floor.
Keeping your feet together and legs straight, initiate the movement by tucking in your chin and lifting your torso up by flexing your abdominal muscles.
As you sit up, reach your hands towards your toes, keeping your arms straight. Ensure your back is straight and your core is engaged throughout the movement.
Once you have reached up as far as you can, with your fingers pointing toward your toes, slowly lower your torso back down to the starting position with control.
Repeat the movement for the desired number of repetitions and sets.
Tips: Keep the movement controlled and avoid using momentum to sit up. If you feel any strain in your lower back or neck, adjust the range of motion or consult a fitness professional for guidance.
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Straight-Leg Sit-Up FAQs
What muscles does the Straight-Leg Sit-Up work?
The Straight-Leg Sit-Up mainly works the core, with help from the glutes & hips. The main muscles are the rectus abdominis.
What equipment do you need for the Straight-Leg Sit-Up?
None. The Straight-Leg Sit-Up is a bodyweight exercise, so you can do it anywhere.
Is the Straight-Leg Sit-Up a compound exercise?
Yes. It's a compound movement, meaning it trains several muscle groups at once rather than isolating one.
What are some Straight-Leg Sit-Up variations and alternatives?
Similar exercises include the Three-Quarter Sit-Up, Ab Mat Sit-Up, Abdominal Stretch and Arms-Up Full Sit-Up.
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