Research Center in Sports Sciences, Health Sciences and Human Development (CIDESD), University of Maia, Maia,Portugal.
Portugal Football School, Portuguese Football Federation, FPF, Oeiras,Portugal.
Int J Sports Physiol Perform. 2023 Jan 27;18(3):306-312. doi: 10.1123/ijspp.2021-0500. Print 2023 Mar 1.
To investigate the internal training loads of a professional Spanish female futsal team throughout 26 weeks of training including preseason and in-season weeks and verify the impact of training period and/or training load magnitudes on heart-rate variability responses. Furthermore, we aimed to assess, intraindividually, the relationship between training load and the coefficient of variation (CV) of weekly natural log of the root mean square difference of successive normal interbeat (RR) intervals (lnRMSSDCV), obtained from ∼5 measures per week, and recorded in the seated position.
A within-subject design involved 12 high-level outfield female futsal players (mean [SD] age: 23.9 [3.4] y).
lnRMSSD was significantly lower and lnRMSSDCV was significantly higher during the preseason (weeks 1-6) compared to in-season (weeks 7-26) (P < .001). Individually, players presented moderate to large negative correlations between lnRMSSDCV and lnRMSSD during the 26 weeks of observation. Correlations ranged between rplayer4 = -.41 (95% CI, -.69 to -.02) and rplayer12 = -.55 (-.78 to -.18). Players also presented moderate to very large positive correlations between lnRMSSDCV and session rating of perceived exertion. Correlations ranged between rplayer7 = .41 (.04 to .71) and rplayer1 = .71 (.45 to .86).
Professional female futsal players in this study presented increased lnRMSSD and reduced lnRMSSDCV during 20 weeks into the competitive season compared to 6 weeks of preseason. Furthermore, lnRMSSDCV was negatively associated with lnRMSSD on an intraindividual basis. Finally, higher internal training loads were positively correlated with lnRMSSDCV, indicating that heart-rate variability is responsive to weekly training loads.
研究西班牙职业女子五人制足球赛季内和赛季前 26 周的内部训练负荷，并验证训练周期和/或训练负荷大小对心率变异性反应的影响。此外，我们旨在评估个体内部训练负荷与每周自然对数连续正常心搏间期均方根差的变异系数（lnRMSSDCV）之间的关系，每周记录约 5 次，记录时采用坐姿。
采用单组内设计，纳入 12 名高水平的外场女子五人制足球运动员（平均[标准差]年龄：23.9[3.4]岁）。
与赛季内（第 7-26 周）相比，赛季前（第 1-6 周）lnRMSSD 明显降低，lnRMSSDCV 明显升高（P＜0.001）。个体观察 26 周期间，lnRMSSDCV 与 lnRMSSD 之间呈中度至高度负相关。相关性在 rplayer4=-0.41（95%置信区间，-0.69 至-0.02）和 rplayer12=-0.55（-0.78 至-0.18）之间。lnRMSSDCV 与运动时主观感觉用力程度评分之间也呈中度至非常高度正相关。相关性在 rplayer7=0.41（0.04 至 0.71）和 rplayer1=0.71（0.45 至 0.86）之间。
与 6 周的赛季前相比，在 20 周的比赛赛季中，本研究中的职业女子五人制足球运动员的 lnRMSSD 增加，lnRMSSDCV 降低。此外，个体内部 lnRMSSDCV 与 lnRMSSD 呈负相关。最后，较高的内部训练负荷与 lnRMSSDCV 呈正相关，表明心率变异性对每周训练负荷有反应。
