McHugh Malachy P, Clifford Tom, Abbott Will, Kwiecien Susan Y, Kremenic Ian J, DeVita Joseph J, Howatson Glyn
Int J Sports Physiol Perform. 2019 Jan 1;14(1):9-15. doi: 10.1123/ijspp.2018-0131.
To assess the utility of an inertial sensor for assessing recovery in professional soccer players.
In a randomized, crossover design, 11 professional soccer players wore shorts fitted with phase change material (PCM) cooling packs or uncooled packs (control) for 3 h after a 90-min match. Countermovement jump (CMJ) performance was assessed simultaneously with an inertial sensor and an optoelectric system: prematch and 12, 36, and 60 h postmatch. Inertial sensor metrics were flight height, jump height, low force, countermovement distance, force at low point, rate of eccentric force development, peak propulsive force, maximum power, and peak landing force. The only optoelectric metric was flight height. CMJ decrements and the effect of PCM cooling were assessed with repeated-measures analysis of variance. Jump heights were also compared between devices.
For the inertial sensor data, there were decrements in CMJ height on the days after matches (88% [10%] of baseline at 36 h, P = .012, effect size = 1.2, for control condition) and accelerated recovery with PCM cooling (105% [15%] of baseline at 36 h, P = .018 vs control, effect size = 1.1). Flight heights were strongly correlated between devices (r = .905, P < .001), but inertial sensor values were 1.8 [1.8] cm lower (P = .008). Low force during countermovement was increased (P = .031) and landing force was decreased (P = .043) after matches, but neither was affected by the PCM cooling intervention. Other CMJ metrics were unchanged after matches.
This small portable inertial sensor provides a practical means of assessing recovery in soccer players.
评估惯性传感器在评估职业足球运动员恢复情况方面的效用。
采用随机交叉设计，11名职业足球运动员在90分钟比赛后，穿着装有相变材料（PCM）冷却包或未冷却包（对照）的短裤3小时。使用惯性传感器和光电系统同时评估反向移动跳跃（CMJ）表现：比赛前以及比赛后12、36和60小时。惯性传感器指标包括飞行高度、跳跃高度、低力、反向移动距离、最低点力、离心力发展速率、峰值推进力、最大功率和峰值着陆力。唯一的光电指标是飞行高度。采用重复测量方差分析评估CMJ下降情况和PCM冷却的效果。还比较了不同设备之间的跳跃高度。
对于惯性传感器数据，比赛后几天CMJ高度下降（对照条件下，36小时时为基线的88%[10%]，P = 0.012，效应大小 = 1.2），PCM冷却可加速恢复（36小时时为基线的105%[15%]，与对照相比P = 0.018，效应大小 = 1.1）。不同设备之间的飞行高度高度相关（r = 0.905，P < 0.001），但惯性传感器值低1.8[1.8]厘米（P = 0.008）。比赛后反向移动期间的低力增加（P = 0.031），着陆力下降（P = 0.043），但两者均未受PCM冷却干预的影响。比赛后其他CMJ指标未发生变化。
这种小型便携式惯性传感器为评估足球运动员的恢复情况提供了一种实用方法。
