Children and Youth in Sport: A Biopsychosocial Perspective

ability achievement activity adolescent adults American anabolic steroids anxiety approach associated attention become behavior body boys changes child childhood coaches cognitive comparison competence competitive continue critical determine developmental differences early effects environment evaluation example Exercise experience factors female findings fractures gender girls goal growth highly hockey Human important increase indicated individual influence injuries involvement Journal Journal of Sport knowledge League learning less Little male maturity Medicine moral motivation motor skills movement occur organized outcomes parents participation peer perceived perceptions performance period perspective physical physical activity play players positive potential practice Press programs Psychology relative reported responses result role Science selection situations skill Smith Smoll social specific sport programs strategies stress studies success suggests task theory understanding University values Weiss York young athletes youth sport