Differences in the energy cost between children and adults during front crawl swimming
Differences in the energy cost between children and adults during front crawl swimming
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儿童与成人自由泳时能量消耗的差异
DOI：
10.1007/s00421-003-1022-0
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发表时间：
2004
影响因子：
3
通讯作者：
J. Stray
中科院分区：
文献类型：
--
作者：
P. Kjendlie;F. Ingjer;Ørjan Madsen;R. Stallman;J. Stray
关于儿童游泳经济的信息很少。本研究的目的是检查儿童和成人在游泳经济性方面的任何可能的差异。在四种次最大6分钟工作负荷下，比较了成人[n=13，年龄21.4（3.7）岁]和儿童[n=10，年龄11.8（0.8）岁]的游泳经济性。在25 m池中，用道格拉斯袋测定小鼠耗氧量（V / O2），用起搏器灯控制速度。游泳经济是用体重（BM）、体表面积（BSA）和体长（BL）来衡量的。在给定速度下，儿童的V / O2（升/分钟）比成人低，分别为1.86（0.28）和2.39 (0.20)l min - 1 （1.00 m s - 1）。当按大小进行缩放时，儿童的V²O2（以每平方米每分钟升数和每公斤每分钟毫升数计算）比成人高。两组间血氧比无明显差异。以1.00 m s−1的速度游泳1 m时，儿童的氧耗[31.0 (4.6)ml m−1]低于成人[39.9 (3.3)ml m−1 P<0.01]，可能是由于儿童总阻力较小。结果还表明，在儿童中，游泳速度立方与vo2之间存在关系，正如前面所示，在成人中存在关系。结果表明，儿童在对BSA和BM进行计量时，经济性低于成人；在对BL进行计量时，经济性与成人相同；在考虑每米能量成本和绝对V （O2）时，经济性高于成人。
There is little information available about the swimming economy of children. The aim of this study was to examine any possible differences in swimming economy in children and adults, swimming front crawl submaximally. Swimming economy was compared in adults [n=13, aged 21.4 (3.7) years] and children [n=10, aged 11.8 (0.8) years] tested at four submaximal 6-min workloads. Oxygen consumption (V̇O2) was measured with Douglas bags in a 25-m pool and pacer lights were used to control the velocities. Swimming economy was scaled to body size using mass (BM), body surface area (BSA) and body length (BL). Children had lower V̇O2 (litres per minute) at a given velocity than the adults, with 1.86 (0.28) and 2.39 (0.20) l min−1 respectively (at 1.00 m s−1). When scaling for size, children had higher V̇O2 measured in litres per square metre per minute and millilitres per kilogram per minute (divided by BSA and BM) than adults. The V̇O2 divided by BL was found not to differ between the two groups. The O2 cost of swimming 1 m at a velocity of 1.00 m s−1 was lower in the children [31.0 (4.6) ml m−1] than in the adults [39.9 (3.3) ml m−1 P<0.01], probably due to a lower total drag in the children. The results also showed that for children a relationship between swimming velocity cubed and V̇O2 exists as shown earlier for adults. It is concluded that, when scaling for BSA and BM, children are less economical than adults, when scaling for BL, children are equally economical, and when considering energy cost per metre and absolute V̇O2, children are more economical than the adults.