Shin Box Quad Stretch
The Shin Box Quad Stretch is a seated mobility exercise that targets the hips and quadriceps through simultaneous internal and external rotation. It effectively opens up tight hips and improves lower body flexibility for better squat depth and daily movement quality.
Iridium classifies this as a non-loading mobility exercise and excludes the duration from your weekly quadriceps volume landmarks to prevent skewing your Minimum Effective Volume (MEV) calculations. The AI typically programs this movement as part of a dynamic routine if your warmup preferences are set to include them, or during sessions where your 7-day history indicates significant hip flexor fatigue.
Form Cues
- Create 90-degree angles with both knees
- Keep your chest tall and spine neutral
- Push both knees gently into the floor
- Lean back onto your hands to deepen the quad stretch
- Breathe deeply into the tightness
- Don't round your lower back while leaning back
- Don't force your knees down if you feel sharp pain
- Don't let your hips lift excessively off the floor
- Don't hold your breath while stretching
Common Mistakes
- Rounding the spine
- Insufficient knee angle (less than 90 degrees)
- Forcing the range of motion
- Holding breath during tension
- Collapsing the chest
Muscles Worked
This movement primarily targets the quadriceps and hip flexors, specifically isolating the rectus femoris and the internal rotators of the hip. It also engages the core stabilizers to maintain an upright posture, making it essential for unglueing the hips after sitting or heavy lifting.
Primary
Secondary
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