A Squatting Double Standard: Is the Butt-Wink Okay in Pistols?

Rounding your lower back during squats can cause pain and injury. So why is it allowed during one-legged squats?

The “butt wink” is a colloquialism for when the pelvis tucks under at the bottom of the squat. Research indicates that allowing the lower back to go into flexion makes it is more difficult to avoid staying out of flexion in other movements (i.e., butt winks before deadlifts could be dangerous). The rounding of the lower back can also aggravate pain and lead to injury.



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