Different Effect of Cadence on Cycling Efficiency between Young and Older Cyclists
Different Effect of Cadence on Cycling Efficiency between Young and Older Cyclists
复制标题
DOI：
10.1249/mss.0b013e3181e05526
复制
发表时间：
2010-11-01
期刊：
影响因子：
--
通讯作者：
De Vito, Giuseppe
中科院分区：
文献类型：
--
作者：
Sacchetti, Massimo;Lenti, Mauro;De Vito, Giuseppe
萨切蒂，M. LENTI， A. S. DI PALUMBO和G. DE VITO。节奏对青年和老年自行车骑行效率的影响。医学科学。体育Exerc。， Vol. 42, No. 11, pp. 2128-2133, 2010。目的：研究年轻和老年竞技自行车运动员节奏效率关系的差异。方法：8名年轻选手（24.3 +/- 5.3岁）和8名年长选手（65.6 +/- 2.8岁）参加了两次实验。第一个包括增量最大循环测试，以确定自由选择的踏板节奏和(V)除以dotO（2max）时的最大功率输出，第二个用于确定总效率（GE），计算为外部功和能量消耗的比率(（V)除以dotO(2)）。后一项测试包括以最大功率输出的40%和60%以及40,60,80,100和120rpm的节奏进行6分钟的循环运动。结果：在所有考虑的节奏和两种功率输出水平下，老年骑自行车者的GE都低于年轻骑自行车者（P < 0.01）。年轻骑自行车者在60转时效率达到峰值（21.2% +/- 1.9%），而在老年骑自行车者中，在40转时已经观察到这一点，与60转时没有区别（18.3% +/- 0.6%）。随着节奏的增加，GE的下降在老年人中比在年轻人中更为明显（P < 0.01），并且由于后者比前者更多地增加功率输出而得到缓解。这些观察结果与老年人在最大测试中记录的自由选择的节奏比年轻人低一致（P < 0.01）。结论：目前的数据表明，节奏对骑行效率的影响在年轻和老年骑车人之间存在差异，后者使用高节奏似乎更不利。这可能有助于解释为什么年长的骑车者选择以比年轻人更低的节奏骑车。
SACCHETTI, M., M. LENTI, A. S. DI PALUMBO, and G. DE VITO. Different Effect of Cadence on Cycling Efficiency between Young and Older Cyclists. Med. Sci. Sports Exerc., Vol. 42, No. 11, pp. 2128-2133, 2010. Purpose: We investigated the difference in the cadence-efficiency relationship between young and older competitive cyclists. Methods: Eight young (24.3 +/- 5.3 yr) and eight older (65.6 +/- 2.8 yr) competitive cyclists participated in two laboratory sessions. The first consisted of an incremental maximal cycling test to determine the freely chosen pedal cadence and the maximal power output at (V) over dotO(2max) and the second for the determination of gross efficiency (GE), calculated as the ratio of external work and energy expenditure ((V) over dotO(2)). The latter test consisted of 6-min cycling exercise bouts at 40% and 60% of maximal power output and at a cadence of 40, 60, 80, 100, and 120 rpm. Results: GE was lower in older cyclists than that in young cyclists at all cadences considered and at both levels of power output (P < 0.01). Peak efficiency was reached at 60 rpm in young cyclists (21.2% +/- 1.9%), whereas in older cyclists this was observed already at 40 rpm and was not different from that at 60 rpm (18.3% +/- 0.6%). The decline in GE with the increase in cadence was more pronounced in older than in young cyclists (P < 0.01) and was mitigated by the increase in power output more in the latter than in the former. These observations were in line with a lower freely chosen cadence recorded during the maximal test in older than that in young (P < 0.01). Conclusions: The present data indicate that the effect of cadence on cycling efficiency is different between young and older cyclists and that it seems more disadvantageous for the latter to use high cadences. This may help explain why our older cyclists chose to pedal at lower cadences than the younger.