Why Hip Mobility Limits Your Split Squat The split squat demands hip mobility in multiple planes simultaneously. Your front hip requires flexion while your rear hip needs extension. Limited mobility on either side compromises your depth, alignment, and muscle activation. Research in the Journal of Strength and Conditioning Research shows that hip mobility directly determines split squat depth and loading capacity (PMID: 24149748). Restricted hips force compensations that reduce exercise effectiveness and increase injury risk. Unlike bilateral squats, the split squat exposes asymmetrical hip restrictions. You may perform well on one side while struggling on the other. These asymmetries create movement dysfunction that extends beyond split squats. Hip Demands During Split Squats Your front hip moves into deep flexion as you descend. This requires adequate hip flexion range plus external rotation to keep your knee tracking properly. Restrictions pull your knee inward or prevent full depth. Your rear hip extends while the knee flexes. Hip flexor tightness on this side creates anterior pelvic tilt and lumbar hyperextension. Your lower back arches as compensation for hip restriction. Both hips must maintain frontal plane stability throughout the movement. Restricted hip abductors and adductors create lateral hip shift during the descent. Your pelvis tilts or rotates rather than staying level. Testing Hip Mobility for Split Squats The deep squat test reveals flexion capacity. Squat as deep as possible with feet shoulder-width apart. If your hips rise before achieving parallel, hip flexion restrictions exist. The Thomas test assesses hip extension on your rear leg. Lie on a table edge, pull one knee to your chest, and let the other leg hang. A thigh that rises above horizontal indicates hip flexor tightness. During split squats, watch for knee cave, pelvic rotation, or excessive forward lean. These compensations indicate specific mobility limitations that need addressing. Primary Hip Mobility Exercises These exercises address the hip restrictions most commonly limiting split squat performance. Practice them before every leg training session. JME 108: *Wall Required: Place one hand on a wall to your side and bend your upper body toward the wall to try to make your upper body as parallel with the floor as possible. Don't force anything - find what works for you. JME 97: Standing, rotate your upper body over one leg. JME 98: In your chair, bend forward to reach one arm as forward as you can. You will feel a stretch on the reach. JME 112: With your head tilted to your chest, internally rotate one foot and lift that foot up. Keep the foot rotated and your chin tucked throughout. Supporting Hip Work These exercises target additional hip restrictions that affect split squat quality. JME 100: Sitting in your chair, bend forward and hold onto one knee with the opposite arm. You will feel a strecth along your side from holding onto your knee. Play around with the position to find what works for you. JME 105: Sitting in your chair, create and arch with your spine both by pushing your chest forward and then pushing your chest backward. JME 102: Reach your hands toward the floor while keeping your knees straight. Don't force anything - this is about moving the hip joint. Programming Recommendations Spend 8 to 10 minutes on hip mobility before split squat training. Address both front hip flexion and rear hip extension demands with targeted exercises. Perform hip mobility work between sets during your session. This maintains range of motion as fatigue accumulates. Brief stretches between sets prevent hip tightness from building. Train both sides of your hip mobility separately. The asymmetrical nature of split squats reveals side-to-side differences. Address each hip according to its specific restrictions. Common Errors Ignoring side-to-side differences limits progress. Test each hip independently and address the more restricted side with additional mobility work. Balanced hip mobility improves bilateral and unilateral performance. Rushing through mobility work reduces effectiveness. Hip tissues require sustained stretching for lasting change. Hold positions for 60 to 90 seconds to achieve tissue adaptation. Neglecting rotational hip mobility creates hidden restrictions. Your hips must rotate properly during split squats. Include exercises that address internal and external rotation capacity. Progression Strategy Start with shortened split squat stances that reduce hip mobility demands. As flexibility improves, gradually lengthen your stance to increase depth. This progressive approach builds strength through new ranges. Elevate your rear foot progressively higher. The Bulgarian split squat increases hip flexor stretch on the rear leg. Start with a low platform and progress as hip extension improves. Pause at the bottom of each rep to build end-range strength. This loaded stretching approach creates mobility gains while building functional strength. Hold the bottom for 2 to 3 seconds before ascending. simplmobility Integration The simplmobility platform provides hip-specific routines designed for unilateral lower body movement. Targeted programming addresses hip restrictions in focused 2 to 3 minute sessions. Start your 14-day free trial to access hip mobility protocols that unlock your split squat potential. Frequently Asked Questions Why is one side harder than the other for split squats? Asymmetrical hip mobility creates performance differences between sides. Your dominant leg may have different restrictions than your non-dominant side. Address each hip individually based on its specific limitations. Will split squats themselves improve hip mobility? Split squats performed through full available range create mobility improvements over time. However, starting with restricted mobility limits how much the exercise can help. Dedicated mobility work accelerates progress beyond exercise-only approaches. How deep should I go in split squats? Target rear knee lightly touching the ground at the bottom position. This depth requires significant hip mobility on both legs. If you struggle to achieve this depth, hip restrictions likely limit your range.