Lying tuck raise (Knee raises, Flat knee raises)

Muscles

• Rectus abdominis
• External oblique
• Internal oblique
• Iliacus
• Rectus femoris
• Psoas major

Technique

1. Lying on your back, legs together, bent at the knees at 90 degrees, heels hovering above the floor
2. Smoothly raise your legs until your feet are directly above your pelvis, pause at the top
3. Slowly lower the feet until the heels are just above the floor
4. Do not change the angle in the knee during the exercise

Form tips

1. Keep your back flat against the floor and do not let it arch; arching your back means you need to use an easier variation, or spend some time stretching your hip flexors (with hip extension stretches).

Similar Exercises

• Assisted sitting leg extensions
• Sit-up
• Lying leg extension
• Sitting leg extensions
• Roll up

Equipment

• Ground (hands or body)