Exercise guide
L Sit
- Advanced
- Compound
- Timed hold
- Upper legs
- Waist
The L-sit is a premier isometric core exercise that builds exceptional abdominal strength, hip flexor endurance, and scapular stability. It challenges the upper body to maintain a rigid frame while the core and quads work to hold the weight of the legs against gravity.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Position yourself between the bars of a dip station with your hands firmly gripping the handles.
- Depress your shoulders downward, pushing your body up so your neck is long and shoulders are away from your ears.
- Lock your elbows completely and engage your triceps to create a stable base.
How to do it
- Inhale to create core tension, then exhale as you slowly lift your legs straight out in front of you.
- Raise your legs until they are parallel to the floor, forming a 90-degree 'L' shape with your torso.
- Hold the position while maintaining shallow, controlled breaths and keeping the legs perfectly straight.
- Lower your legs with control back to the starting position once the hold duration is complete.
Form checklist
- Keep elbows fully locked out throughout the entire hold.
- Maintain active shoulder depression; do not let your ears sink toward your shoulders.
- Keep your knees locked and toes pointed to engage the entire lower body.
- Ensure your hips stay tucked between or slightly in front of your hands.
Pro tips
- Focus on 'pushing the bars into the ground' to maximize serratus anterior activation and lift height.
- Squeeze your quadriceps as hard as possible; this creates reciprocal inhibition that helps the hip flexors maintain the hold.
- Lean slightly forward into the hold to better engage the deep abdominal wall.
Make it harder
- Transition into a V-Sit by lifting your feet above hip level toward your face.
- Perform the movement on floor parallettes or the ground to increase the requirement for shoulder depression.
Frequently asked
- What muscles does the l sit work?
- The l sit primarily targets the abs, deltoids, and obliques, and also works the glutes and hip flexors as secondary muscles.
- What equipment do you need for the l sit?
- The l sit requires no equipment — just your body weight.
- Is the l sit good for beginners?
- The l sit is rated advanced. Build a base with simpler variations first, then progress to it with light load and strict form.