Effects of a trail running competition on muscular performance and efficiency in well-trained young and master athletes
Effects of a trail running competition on muscular performance and efficiency in well-trained young and master athletes
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DOI：
10.1007/s00421-010-1597-1
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发表时间：
2010-12-01
影响因子：
3
通讯作者：
Brisswalter, Jeanick
中科院分区：
文献类型：
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作者：
Easthope, Christopher Schmidt;Hausswirth, Christophe;Brisswalter, Jeanick
为了确定越野跑比赛的急性效应以及年轻运动员和大师运动员之间的年龄依赖性差异，23名受试者[10名年轻运动员（30.5 +/- A 7岁），13名大师运动员（45.9 +/- A 5.9岁）]参加了55公里越野跑比赛。该研究被认为是一项干预研究，包括前，后1，24，48和72小时的测量。测量包括血液测试，测力计骑自行车和最大等长随意收缩（MVC）。监测的参数包括MVC、抽搐和M波特性、股外侧肌的EMG（RMS）、两种运动效率计算和血液中的肌肉损伤标记物（CK、LDH）。结果显示，运动后CK和LDH升高，MVC值降低（青年组和熟练组分别为-32%和-40%，P < 0.01），EMG降低，收缩时间延长，同时抽搐峰值降低，运动效率降低（青年组和熟练组分别为-4.6%和-6.3%，P < 0.05）。大师们表现出与年轻人相似的疲劳和肌肉损伤，但大师们的恢复速度较慢。这项研究表明，越野跑对肌肉功能有害，并表明训练可能不会阻止肌肉老化，但可以帮助保持性能水平。
To determine the acute effects of a trail running competition and the age-dependent differences between young and master athletes, 23 subjects [10 young (30.5 +/- A 7 years), 13 master (45.9 +/- A 5.9 years)] participated in a 55-km trail running competition. The study was conceived as an intervention study compromising pre, post 1, 24, 48 and 72 h measurements. Measurements consisted of blood tests, ergometer cycling and maximal isometric voluntary contractions (MVC). Parameters monitored included MVC, twitch- and M-wave properties, EMG (RMS) of the vastus lateralis, two locomotion efficiency calculations and muscle damage markers in the blood (CK, LDH). Results indicate post-race increases in CK and LDH, decreases in MVC values (-32 vs. -40% in young and master, P < 0.01), decreases in EMG, increases in contraction time and concomitant decreases in peak twitch values, and a decrease in locomotion efficiency (-4.6 vs. -6.3% in young and master, P < 0.05). Masters showed similar fatigue and muscle damage than young but recuperation was slowed in masters. This study shows that trail runs are detrimental to muscle function, and gives indication that training may not halt muscle deterioration through aging, but can help maintain performance level.