Faculty of Sports Sciences, University of Extremadura, 10003 Cáceres, Spain.
Faculty of Languages and Education, University of Nebrija, 28015 Madrid, Spain.
Int J Environ Res Public Health. 2021 Mar 27;18(7):3484. doi: 10.3390/ijerph18073484.
Muscle oxygen consumption could provide information on oxidative metabolism in women soccer players. Therefore, the objective of this study was to analyze muscle oxygenation dynamics during repeated sprint ability (RSA): (8 sprint × 20 s recovery) by near-infrared spectroscopy (NIRS). The sample was made up of 38 professional women soccer players. To measure the external load, the best time, worst time, average time, individual speed, sprint decrement, and power were assessed. In connection with the internal load, the desaturation (sprint) and re-saturation (recovery) rates, as well as the oxygen extraction (∇%SmO) in the gastrocnemius muscle and maximum heart rate (%HRmax) were measured. A repeated measures statistic was applied based on the inter-individual response of each subject from the baseline versus the other sprints, with linear regression and nonlinear regression analyses between variables. There was an increase in the SmO: desaturation rate after four sprints (Δ = 32%), in the re-saturation rate after six sprints (Δ = 89%), and in ∇%SmO after four sprints (Δ = 72.1%). There was a linear association between the rates of desaturation and re-saturation relationships and the worst time (r = 0.85), and a non-linear association between ∇%SmO and speed (r = 0.89) and between ∇%SmO2 and the sprint decrease (r = 0.93). The progressive increase in SmO during RSA is a performance limitation to maintain a high speed; it depends on the capacity of fatigue resistance. Therefore, monitoring the muscle oxygenation dynamics could be a useful tool to evaluate the performance in women soccer players.
肌肉耗氧量可以提供关于女子足球运动员氧化代谢的信息。因此，本研究的目的是通过近红外光谱（NIRS）分析重复冲刺能力（RSA）期间的肌肉氧合动力学：（8 次冲刺×20 秒恢复期）。样本由 38 名职业女子足球运动员组成。为了测量外部负荷，评估了最佳时间、最差时间、平均时间、个体速度、冲刺衰减和功率。关于内部负荷，测量了腓肠肌的去饱和度（冲刺）和再饱和度（恢复期）率以及氧提取（∇%SmO）和最大心率（%HRmax）。基于每个受试者的个体反应，采用重复测量统计方法，对基线与其他冲刺之间的每个受试者进行比较，对变量进行线性回归和非线性回归分析。在四个冲刺后 SmO 增加：去饱和度率增加 32%（Δ=32%），在六个冲刺后再饱和度率增加 89%（Δ=89%），在四个冲刺后∇%SmO 增加 72.1%（Δ=72.1%）。去饱和度和再饱和度率与最差时间之间存在线性关系（r=0.85），∇%SmO 与速度之间存在非线性关系（r=0.89），∇%SmO2 与冲刺衰减之间存在非线性关系（r=0.93）。RSA 期间 SmO 的逐渐增加是维持高速的表现限制，这取决于抗疲劳能力。因此，监测肌肉氧合动力学可能是评估女子足球运动员表现的有用工具。
