期刊名称：Facta Universitatis : Series Physical Education and Sport
印刷版ISSN：1451-740X
出版年度：2017
卷号：15
期号：2
页码：249-259
DOI：10.22190/FUPES1702249L
语种：English
出版社：University of Niš
摘要：Beach flags are a surf lifesaving event that involves a 20-meter sprint across sand. Sprinters begin in a prone position, facing the opposite direction to the intended sprint, before rising and turning to sprint and dive to capture a flag positioned in the sand. The typical start involves posterior movement away from the start line during the turn. Anecdotal evidence has suggested that beach flags sprinters can use variations to the start technique documented in the literature. Therefore, this research provided a case study of a start variation termed the pivot start. One male (age = 19 years; height = 1.74 m; mass = 66 kilograms), and one female (age = 23 years; height = 1.68 m; mass = 57 kilograms) elite sprinter were analyzed. A high-speed camera filmed the start. The analyzed data included: start time; hip and shoulder height during the turn; feet spacing; elbow, hip, knee, trunk lean, and trajectory angles at take-off, and descriptive statistics were derived. The analysis showed that the sprinters had no posterior movement behind the start line as they kept one leg on the start line, while the other leg was swung about the body so the sprinter rotated about the pivot leg. The rotatory start movements placed both sprinters into an effective, low body position for acceleration, indicated by trunk lean (~60°) and trajectory angle (~47°). These unique movement patterns should be trained accordingly for beach flags sprinters that use the pivot start.
