TETSUFlexion Leg Sit Up (Straight Arm)
The Flexion Leg Sit Up (Straight Arm) is a bodyweight exercise for the core that primarily targets the abs, with the hip flexors and quadriceps assisting. Follow the 5 steps below for correct form, with an animated demonstration.
How to do the Flexion Leg Sit Up (Straight Arm)
- Lie flat on your back with your legs extended and arms straight above your head.
- Engaging your abs, lift your upper body off the ground while simultaneously lifting your legs towards your chest.
- Reach your hands towards your toes as you lift your upper body and legs.
- Pause for a moment at the top, then slowly lower your upper body and legs back down to the starting position.
- Repeat for the desired number of repetitions.
Common questions
What muscles does the Flexion Leg Sit Up (Straight Arm) work?
The Flexion Leg Sit Up (Straight Arm) primarily targets the abs. The hip flexors and quadriceps work as supporting muscles.
What equipment do I need for the Flexion Leg Sit Up (Straight Arm)?
None. The Flexion Leg Sit Up (Straight Arm) uses your body weight only, so you can do it anywhere.
How many sets and reps of the Flexion Leg Sit Up (Straight Arm) should I do?
3 to 4 sets of 10 to 15 controlled reps of the Flexion Leg Sit Up (Straight Arm) suits most programs — smaller muscle groups respond well to moderate loads and strict form. Progress by adding reps first, then small weight increments.
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