期刊
PEDIATRIC EXERCISE SCIENCE
卷 27, 期 1, 页码 85-94出版社
HUMAN KINETICS PUBL INC
DOI: 10.1123/pes.2013-0096
关键词
boys; speed; stride length; stride frequency; contact time; maturation
The purpose of this study was to examine the natural development of the mechanical features of sprint performance in relation to maturation within a large cohort of boys. Three hundred and thirty-six boys (11-15 years) were analyzed for sprint performance and maturation. Maximal speed, stride length (SL), stride frequency (SF), flight time (FT) and contact time (CT) were assessed during a 30m sprint. Five maturation groups (G1-5) were established based on age from peak height velocity (PHV) where G1=>2.5years pre-PHV, G2 = 2.49-1.5years pre-PHV, 03 = 1.49-0.5years pre-PHV, 04 = 0.49years pre- to 0.5years post-PHV and G5 0.51-1.5years post-PHV. There was no difference in maximal speed between 01, 02 and G3 but those in 04 and 05 were significantly faster (p <.05) than G1-3. Significant increases (p <.05) in SL were observed between groups with advancing maturation, except G4 and 05 (p >.05). SF decreased while CT increased (both p <.05) between 01, G2 and 03, but no further significant changes (p >.05) were observed for either variable between 03, G4 and G5. While G1-3 increased their SL, concomitant decreases in SF and increases in CT prevented them from improving maximal speed. Maximal sprint speed appears to develop around and post-PHV as SF and CT begin to stabilize, with increases in maximal sprint speed in maturing boys being underpinned by increasing SL.
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