Effects of Stretch Shortening Cycle Exercise Fatigue on Stress Fracture Injury Risk during Landing

Autor/inn/en	James, C. Roger; Dufek, Janet S.; Bates, Barry T.
Titel	Effects of Stretch Shortening Cycle Exercise Fatigue on Stress Fracture Injury Risk during Landing
Quelle	In: Research Quarterly for Exercise and Sport, 77 (2006) 1, S.1-13 (13 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0270-1367
Schlagwörter	Fatigue (Biology); Injuries; Risk; Exercise Physiology; Physical Activities; Physical Fitness; Mechanics (Physics); Kinetics; Motion; Action Research; Multiple Regression Analysis + Suchen Sie Ihr Suchwort? Fatigue; Ermüdung; Risiko; Sportphysiologie; Leistungsfähigkeit; Mechanik; Kinetik; Bewegungsablauf; Projektforschung
Abstract	The purpose of this study was to examine changes in landing performance during fatigue that could result in increased stress fracture injury risk. Five participants performed nonfatigued and fatigued drop landings (0.60 m), while ground reaction force (GRF), electromyographic (EMG) activity, and kinematics were recorded. Fatigue was defined as a 5-20% reduction in vertical jumping performance. Single-subject analyses revealed that all participants were affected (p less than or equal to 0.05) by fatigue. Post hoc comparisons revealed a group effect (p less than or equal to 0.05) for selected variables. Participants landed with (a) less joint flexion at contact and used a greater range of motion, (b) greater GRF peaks and loading rates, and (c) less EMG activity. These changes were consistent with greater risk of stress fracture. (Contains 4 figures and 5 tables.) (Author).
Anmerkungen	American Alliance for Health, Physical Education, Recreation and Dance. 1900 Association Drive, Reston, VA 20191. Tel: 800-213-7193; Fax: 703-476-9527; e-mail: info@aahperd.org; Web site: http://www.aahperd.org.
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10