Leg Raise

Definition

The leg raise is a bodyweight core exercise where you lift your legs from a hanging or lying position, targeting the hip flexors and lower abdominals through hip flexion against gravity. It builds the anterior core strength and hip flexor endurance that HYROX^® athletes need for running mechanics, wall balls, and maintaining posture during station work.

Technique & Form

1. Setup (hanging): Hang from a pull-up bar with an overhand grip, arms fully extended. Engage your lats to prevent swinging.
2. Lift: Raise your legs together, keeping them straight (or slightly bent for easier variation). Lift until your thighs reach parallel or higher.
3. Control: Pause for 1 second at the top. Avoid swinging - if you are swinging, the momentum is doing the work, not your abs.
4. Lower: Return your legs to the starting position with a controlled 2-3 second descent. Do not simply drop them.

Muscles Worked

• Primary movers: Hip flexors (iliopsoas, rectus femoris), lower rectus abdominis
• Secondary muscles: Obliques (stabilization), upper rectus abdominis
• Stabilizers: Lats, forearms (grip in hanging version), serratus anterior

Common Mistakes

1. Using momentum (kipping): Swinging the legs up removes the core training stimulus. Fix: pause between reps to eliminate momentum. If you cannot do controlled reps, switch to lying leg raises until you build the strength.
2. Only lifting to 45 degrees: Stopping short of parallel limits abdominal engagement - at that angle, the hip flexors do most of the work. Fix: lift until your thighs are at least parallel to the floor.
3. Dropping the legs on the descent: The eccentric phase is where much of the core strengthening occurs. Fix: lower your legs for a full 3-second count every rep.

Benefits

• Strengthens the hip flexors and lower abs, which are critical for maintaining running stride height under fatigue
• Develops grip endurance (hanging variant) that transfers to farmer's carries and sled pulls
• Builds the anterior core strength that prevents excessive lumbar extension during overhead movements
• Requires no equipment for the lying variant, making it accessible anywhere

HYROX^® Context

Leg raises support HYROX^® performance primarily through hip flexor conditioning and anterior core strength. During the running segments (particularly laps 5-8), fatigued hip flexors cause your stride to shorten and your knees to drop, slowing your pace. Leg raises build the endurance in these muscles that maintains your running mechanics when everything else is tired.

For Wall Balls, strong lower abs prevent excessive lumbar extension during the catch phase. For the Farmers Carry, the hanging leg raise variant builds grip endurance alongside core strength. Program leg raises 3-4 times per week: 3x10-15 hanging raises for advanced athletes, or 3x15-20 lying raises for those building toward the hanging version.

Variations & Alternatives

• Plank: Isometric core hold that builds anti-extension strength from a different angle. Less hip flexor demand.
• Mountain Climber: Dynamic core exercise combining hip flexion with cardiovascular conditioning.
• Toes-to-Bar: Advanced hanging leg raise variation where feet touch the bar. Requires significant core and grip strength.

FAQ

Should I do hanging or lying leg raises for HYROX^® training?

Hanging leg raises are more challenging and build grip endurance alongside core strength, making them more HYROX^®-specific. If you cannot complete 8-10 controlled hanging reps, start with lying leg raises and progress. The lying version isolates the core without grip fatigue as a limiting factor.

How do leg raises improve HYROX^® running performance?

Leg raises strengthen the hip flexors (iliopsoas and rectus femoris) that lift your knees during the running stride. In later laps of HYROX^®, when your legs are fatigued from station work, strong hip flexors maintain stride height and cadence. Weak hip flexors lead to shuffling, which adds seconds to every running kilometer.

ROXBASE programs core training that targets your specific race weaknesses. If your running laps are slowing disproportionately, our engine adds hip flexor and core work to maintain your stride through the finish. Start your free plan and run strong to the end.