Lund R J, Guthrie A J, Mostert H J, Travers C W, Nurton J P, Adamson D J
Equine Research Centre, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa.
J Appl Physiol (1985). 1996 Jun;80(6):2190-7. doi: 10.1152/jappl.1996.80.6.2190.
Horses were exercised at 105% of their maximal O2 uptake until fatigued after three different warm-up regimens (no warm-up, a light warm-up, and a warm-up until the central venous temperature was > 39.5 degrees C) to assess the effect of the warm-up on the various avenues of heat loss. Approximately 12.79, 15.10, and 18.40 MJ of heat were generated in response to the warm-up and exercise after the three different warm-up regimens, respectively. Of the heat generated, 17.5, 17.2, and 17.4% remained as stored heat after 20 min of active recovery. Heat loss from the respiratory system was 63.6, 33.7, and 40.3% of the heat produced during and after the three warm-up intensities, respectively. The balance of the heat loss was assumed to be via the evaporation of sweat. On this basis, the heat loss by sweating was 14.9, 49.1, and 42.3% of the heat produced during and after the three warm-up intensities, which represented evaporation of 0.8, 3.1, and 3.0 liters of sweat, respectively. O2 consumption during exercise and heart rates 20 min postexercise, after two of the warm-up regimens, was significantly lower than that after no prior warm-up.
让马匹在最大摄氧量的105%强度下运动，直至疲劳，运动前进行三种不同的热身方案（不热身、轻度热身以及热身至中心静脉温度>39.5摄氏度），以评估热身对各种散热途径的影响。在三种不同的热身方案后，热身和运动分别产生了约12.79、15.10和18.40兆焦耳的热量。在主动恢复20分钟后，所产生的热量中分别有17.5%、17.2%和17.4%以储存热量的形式留存。在三种热身强度期间及之后，呼吸系统的散热量分别占所产生热量的63.6%、33.7%和40.3%。其余的热量损失被认为是通过汗液蒸发。在此基础上，出汗造成的热量损失分别占三种热身强度期间及之后所产生热量的14.9%、49.1%和42.3%，分别相当于蒸发了0.8升、3.1升和3.0升汗液。在两种热身方案后，运动期间的耗氧量以及运动后20分钟的心率显著低于未进行任何热身的情况。
