L-sit

Instructions

1
Sit on the leg extension machine with your back against the backrest and your legs bent at approximately 90 degrees. Position your feet under the foot pads with your knees aligned with the machine's pivot point.
2
Grip the handles on both sides of the seat for stability. Ensure your torso remains upright and pressed against the backrest throughout the movement. Adjust the machine so the foot pad contacts your lower leg just above your ankles.
3
Slowly lower the weight by allowing your legs to bend, bringing your feet back toward your body in a controlled manner. Maintain contact with the foot pad and keep your back against the backrest. Lower until your knees reach approximately 90 degrees of flexion.
4
Extend your legs forward against the resistance, straightening your knees fully at the top of the movement. Squeeze your quadriceps at full extension, then control the weight as you return to the starting position without locking out your knees.
PRIMARY MUSCLESQuadriceps
SECONDARY MUSCLESRectus Femoris, Vastus Lateralis, Vastus Medialis, Hip Flexors
EQUIPMENTBody weight
DIFFICULTYBeginner

Overview

Athletic trainers and bodybuilding coaches frequently recommend the L-sit because it challenges the Quadriceps through a dynamic range of motion. By relying on Body weight, it reinforces proper movement patterns and builds robust strength in the Waist region.

Benefits

  • Promotes balanced muscular development by effectively recruiting the Quadriceps and associated synergists.
  • Improves overall Waist stability and proprioception during heavy loads.
  • Reduces the likelihood of Waist injuries by reinforcing connective tissue strength.
  • Acts as a highly scalable Strength movement, perfect for both beginners and elite athletes.

Common Mistakes

  • Failing to achieve a full range of motion, which drastically limits Quadriceps engagement.
  • Shrugging the shoulders or compensating with secondary muscles rather than isolating the Quadriceps.
  • Losing core tension, leading to poor spinal alignment and reduced power output.

Pro Tips

Control the eccentric (lowering) phase of the L-sit for 3-4 seconds to drastically increase time under tension.

Muscle Anatomy

The primary driver is the Quadriceps. However, the movement also recruits Rectus Femoris, Vastus Lateralis, Vastus Medialis, Hip Flexors to maintain control of the Body weight.

Exercise Variations

  • Dumbbell L-sit
  • Cable L-sit
  • Banded L-sit

Frequently Asked Questions