Box Step Down
The Box Step Down is a unilateral lower-body exercise that targets the quadriceps and glutes by focusing on a controlled descent from an elevated surface. It is highly effective for building single-leg strength, improving knee stability, and correcting muscular imbalances.
Iridium tracks the significant eccentric fatigue generated by this movement and adjusts your quadriceps recovery score to prevent scheduling it when your legs are consistently under-recovered. Because resistance relies largely on gravity, the system calculates progressive overload by comparing your rep performance and RPE specifically against your current body weight.
Form Cues
- Stand tall on the box with one foot hovering off the edge
- Hinge slightly at the hips while keeping your chest up
- Lower yourself slowly for a 3-second count using only the standing leg
- Lightly tap the floor with your heel without transferring weight
- Drive through the box leg to return to the start
- Don't push off the bottom foot to get back up
- Don't let your standing knee collapse inward
- Don't drop quickly or freefall to the floor
- Don't allow your hips to hike or tilt sideways
Common Mistakes
- Pushing off the floor
- Uncontrolled descent
- Knee valgus (caving in)
- Excessive forward lean
- Using a box that is too high
Muscles Worked
This exercise is a powerhouse for the quadriceps, specifically targeting the VMO (teardrop muscle) through the controlled eccentric lowering phase. It also heavily recruits the glutes and core to stabilize the pelvis and knee, ensuring proper alignment during this single-leg movement.
Primary
Secondary
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