Flexion Leg Sit up (bent knee)
Strengthen your rectus abdominis with the bent-knee flexion leg sit-up. This bodyweight exercise builds core endurance and improves spinal flexion for a
Description
A sit up variation where the legs are bent at the knees, focusing on the core muscles.
How to Do Flexion Leg Sit up (bent knee)
- 1Setup
Lie on your back with your knees bent at approximately a 90-degree angle and your feet flat on the floor, hip-width apart.
- 2Setup
Position your hands lightly behind your head with elbows wide, or cross your arms over your chest.
- 3
Exhale as you slowly curl your torso upwards, initiating the movement by lifting your head, then shoulders, and finally your upper back off the floor.
- 4
Continue to flex your spine until your chest approaches your thighs, keeping your feet grounded and maintaining a controlled motion.
- 5
Inhale as you slowly reverse the movement, uncurling your spine segment by segment until your shoulders and head gently return to the starting position.
Tips
- Focus on a smooth, controlled spinal flexion and extension rather than using momentum to lift your body, ensuring continuous abdominal engagement.
- Keep your gaze directed towards the ceiling or slightly forward throughout the movement to help maintain a neutral neck position and avoid strain.
- Engage your transverse abdominis by gently drawing your navel towards your spine before you begin to lift, providing greater core stability.
- Avoid pulling on your neck with your hands; if you feel neck strain, place your fingertips lightly behind your ears or cross your arms over your chest instead.
Common Mistakes
- ×Using momentum to sit up rather than core strength will reduce muscle activation; instead, perform a slow, controlled curl through your spine.
- ×Pulling on the neck with your hands can cause strain; instead, use your hands only for gentle support or cross your arms over your chest.
- ×Lifting your feet off the floor indicates an over-reliance on hip flexors; instead, keep your feet firmly planted by focusing on core engagement.
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