Position of the Hip in Yoga.

BACKGROUND: Yoga is growing in popularity as a form of exercise throughout the world. Orthopedic patients participate in yoga, yet little is known about the ranges-of-motion of the hip within various yoga poses. Orthopedic surgeons are unsure about what potential positions their patients are placing their hips during a yoga practice. The aim of this study is to quantify the degree of hip motion with common yoga poses. METHODS: Twenty healthy, regular practitioners of yoga performed 11 different yoga poses in a standardized fashion. Motion analysis was used to capture range-of-motion of the hip during each pose. RESULTS: Many yoga poses put the hip in extremes of motion. Poses such as downward dog, forward fold, seated twist, and pigeon stressed the hip in flexion. Warrior 1, warrior 2, crescent lunge, pigeon, and triangle stressed the hip in extension. Eagle and seated twist put the hip in higher adduction, while half moon, eagle, and triangle produced more hip internal rotation. CONCLUSION: Many poses were found to reach extremes of hip motion. This study may help guide the orthopedic surgeon in counseling hip arthroplasty and hip impingement patients about yoga-related activity. By knowing which poses potentially stress the hip in particular planes of motion, surgeons may better inform their patients who are returning to yoga after injury or surgery.