Tracking the performance, energetics and biomechanics of international versus national level swimmers during a competitive season
Tracking the performance, energetics and biomechanics of international versus national level swimmers during a competitive season
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DOI：
10.1007/s00421-011-2037-6
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发表时间：
2012-03-01
影响因子：
3
通讯作者：
Barbosa, Tiago M.
中科院分区：
文献类型：
--
作者：
Costa, Mario J.;Bragada, Jose A.;Barbosa, Tiago M.
本研究的目的是跟踪和比较国际(INT)和国家(NAT)水平游泳运动员在一个赛季中的表现、能量和生物力学特征的变化。10名葡萄牙男子游泳运动员(4名INT和6名NAT水平的受试者)在2009-2010赛季的三个不同时间段(TP1、TP2、TP3)进行了评估。游泳成绩是根据官方公布的200米自由泳项目名单进行评估的。采用一组递增的7x200米游泳来评估能量和生物力学数据。以乳酸水平下的速度(V4)、V4的每搏指数(SI@V4)和V4的推进效率(ETAp@V4)作为能量估计指标，以V4的行程长度(SL@V4)和V4的行程频率(SF@V4)作为生物力学变量。结果显示，在整个赛季中，所有变量都没有显著变化。组间比较指出，国际游泳运动员的得分更高，所有时间段的200米成绩都存在统计学差异。TP1和TP3的SI@V4具有统计学意义的近似值。基于K值的跟踪仅对SI@V4高。结果表明，优秀游泳运动员在一个赛季中的表现、能量和生物力学特征都具有较高的稳定性。INT游泳运动员在任何时候都能保持比NAT游泳运动员更高的能量和生物力学能力。SI@V4可用作性能变化的指标。
The purpose of this study was to track and compare the changes of performance, energetic and biomechanical profiles of international (Int) and national (Nat) level swimmers during a season. Ten Portuguese male swimmers (four Int and six Nat level subjects) were evaluated on three different time periods (TP1, TP2, TP3) of the 2009-2010 season. Swimming performance was assessed based on official time's lists of the 200-m freestyle event. An incremental set of 7 x 200 m swims was applied to assess the energetic and biomechanical data. Measurements were made of: (1) velocity at the 4 mmol of lactate levels (V4), stroke index at V4 (SI@V4) and propelling efficiency at V4 (eta p@V4), as energetic estimators; (2) stroke length at V4 (SL@V4) and stroke frequency at V4 (SF@V4), as biomechanical variables. The results demonstrated no significant variations in all variables throughout the season. The inter-group comparison pointed out higher values for Int swimmers, with statistical differences for the 200 m performance in all time periods. Near values of the statistical significance were demonstrated for the SI@V4 in TP1 and TP3. The tracking based on K values was high only for the SI@V4. It is concluded that a high stability can be observed for elite swimmers performance, energetic and biomechanical profiles throughout a single season. Int swimmers are able to maintain a higher energetic and biomechanical capacity than Nat ones at all times. The SI@V4 may be used as an indicator of performance variation.