Squat Biomechanics: Butt Wink – What is it, What Causes it, & How Can it be Improved? By Bret ContrerasGlute Training, Low Back Reconditioning, Spinal Health, Strength Training, Stretching/Flexibility48 Comments “Butt wink” is a common issue for the majority of squatters. But what exactly is butt wink, what causes it, and can it be improved? If so, how? In the… Read More September 23, 2013