Osgnach Cristian, di Prampero Pietro Enrico
Exelio srl, Sport Science Department, Udine, Italy.
University of Udine, Department of Medical and Biological Sciences, Udine, Italy.
Int J Sports Med. 2018 Jul;39(8):588-595. doi: 10.1055/a-0592-7219. Epub 2018 Jun 14.
A previous approach to estimate the time course of instantaneous metabolic power and O consumption in team sports has been updated to assess also energy expenditure against air resistance and to identify walking and running separately. Whole match energy expenditure turned out ≈14% smaller than previously obtained, the fraction against the air resistance amounting to ≈2% of the total. Estimated net O consumption and overall energy expenditure are fairly close to those measured by means of a portable metabolic cart; the average difference, after a 45 min exercise period of variable intensity and mode, amounting to ≈10%. Aerobic and anaerobic energy yields, metabolic power, energy expenditure and duration of High (HI) and Low (LI) intensity bouts can also be estimated. Indeed, data on 497 soccer players during the 2014/2015 Italian "Serie A" show that the number of HI efforts decreased from the first to the last 15-min periods of the match, without substantial changes in mean metabolic power (≈22 W·kg) and duration (≈6.5 s). On the contrary, mean metabolic power of the LI decreased (5.8 to 4.8 W·kg), mainly because of a longer duration thereof, thus underscoring the need for longer recovery periods between HI.
一种先前用于估计团队运动中瞬时代谢功率和耗氧量随时间变化的方法已经更新，以评估对抗空气阻力的能量消耗，并分别识别步行和跑步。整场比赛的能量消耗比之前得到的结果约小14%，其中对抗空气阻力的部分约占总能量的2%。估计的净耗氧量和总能量消耗与通过便携式代谢推车测量的结果相当接近；在45分钟强度和模式可变的运动期后，平均差异约为10%。有氧和无氧能量产生、代谢功率、能量消耗以及高强度（HI）和低强度（LI）运动的持续时间也可以被估计。事实上，2014/2015赛季意大利“甲级联赛”中497名足球运动员的数据显示，比赛中从第一个15分钟时段到最后一个15分钟时段，高强度运动的次数减少，而平均代谢功率（约22W·kg）和持续时间（约6.5秒）没有显著变化。相反，低强度运动的平均代谢功率下降（从5.8W·kg降至4.8W·kg），主要是因为其持续时间变长，从而突出了在高强度运动之间需要更长恢复时间的必要性。
