| چکیده انگلیسی مقاله |
Purpose: The aim of the present study was to investigate associations between skeletal muscle mass, body fat and training characteristics with running times in master athletes (age > 35 years) in half-marathon, marathon and ultra-marathon. Methods : We compared skeletal muscle mass, body fat and training characteristics in master half-marathoners ( n =103), master marathoners ( n =91) and master ultra-marathoners ( n =155) and investigated associations between body composition and training characteristics with race times using bi- and multi-variate analyses. Results : After multi-variate analysis, body fat was related to half-marathon ( ß =0.9, P =0.0003), marathon ( ß =2.2, P <0.0001), and ultra-marathon ( ß =10.5, P <0.0001) race times. In master half-marathoners ( ß =-4.3, P <0.0001) and master marathoners ( ß =-11.9, P <0.0001), speed during training was related to race times. In master ultra-marathoners, however, weekly running kilometers ( ß =-1.6, P <0.0001) were related to running times. Conclusions : To summarize, body fat and training characteristics, not skeletal muscle mass, were associated with running times in master half-marathoners, master marathoners, and master ultra-marathoners. Master half-marathoners and master marathoners rather rely on a high running speed during training whereas master ultra-marathoners rely on a high running volume during training. The common opinion that skeletal muscle mass affects running performance in master runners needs to be questioned. Key Words: Body Fat; Skinfold Thickness; Anthropometry; Running; Sports |
