How to do the Flexion Leg Sit Up (bent Knee)
Flexion Leg Sit Up (bent Knee) is a beginner single-joint isolation pushing exercise targeting the Abs in the Waist region. Performed using bodyweight, it falls under the strength category. Secondary muscles engaged include Hip Flexors.
Flexion Leg Sit Up (bent Knee) demonstration · © GymiaFit
Flexion Leg Sit Up (bent Knee) at a glance
- Primary muscles
- Abs
- Secondary muscles
- Hip Flexors
- Equipment
- Body Weight
- Level
- Beginner
- Type
- Isolation (single-joint)
- Force
- Push
Flexion Leg Sit Up (bent Knee) step by step
- 1Lie flat on your back with your knees bent and feet flat on the ground.
- 2Place your hands behind your head with your elbows pointing outwards.
- 3Engaging your abs, slowly lift your upper body off the ground, curling forward until your torso is at a 45-degree angle.
- 4At the same time, lift your legs off the ground, bending your knees and bringing them towards your chest.
- 5Pause for a moment at the top, then slowly lower your upper body and legs back down to the starting position.
- 6Repeat for the desired number of repetitions.
Flexion Leg Sit Up (bent Knee) — questions
What muscles does the Flexion Leg Sit Up (bent Knee) work?
The Flexion Leg Sit Up (bent Knee) primarily targets the Abs. It also recruits the Hip Flexors as secondary movers.
What equipment do I need for the Flexion Leg Sit Up (bent Knee)?
None — the Flexion Leg Sit Up (bent Knee) uses your bodyweight only, so it works at home with nothing but floor space.
Is the Flexion Leg Sit Up (bent Knee) suitable for beginners?
Yes. It is classed as a beginner movement: the pattern is simple enough to learn in a session and easy to scale by adjusting range of motion or load.
What can I do instead of the Flexion Leg Sit Up (bent Knee)?
3/4 Sit-up, 45° Side Bend, Air Bike train the same muscles and make good substitutes when the equipment is taken or the movement does not suit you.
Log it, don't guess it.
The GymiaFit app has the Flexion Leg Sit Up (bent Knee) demo, form cues and set logging built in — plus a muscle map that shows what you have actually trained this week. Free on iOS and Android.