作者单位:Univ N Carolina, Sch Med, Dept Orthopaed, Chapel Hill, NC 27515 USA[1]Univ N Carolina, Dept Exercise & Sport Sci, 210 South Rd,Fetzer Hall, Chapel Hill, NC 27599 USA[2]Univ N Carolina, Human Movement Sci Curriculum, Chapel Hill, NC 27515 USA[3]Brigham Young Univ, Dept Exercise Sci, Provo, UT 84602 USA[4]