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Straight-leg Sit Up

Straight-leg Sit Up

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Muscle Groups
  • Abs and Core
  • Hips & Buttocks
  • Abdominal strength


The straight leg sit up is a challenging exercise that develops strength in the abdominals and hip flexors. Straight leg sit ups should not be performed by anyone with low back problems. This is a very challenging exercise that is much harder than bent knee sit ups.


  • Lie on your back with your legs straight on the floor.
  • Place your finger tips to the sides of your head.
  • Keeping your neck neutral, roll your upper back off the floor until you are sitting upright.
  • Return slowly to the start position.


  • Jutting the chin as you sit up
  • Bending the legs while sitting up
  • Letting the legs come off the ground while sitting up