Athletes are at risk of overtraining. Therefore, athletes need to build a strategy to get a better condition after training. If optimum recovery is achieved by good sleep, athletes can be engaged in other physical activities or increase the load of exercise in the upcoming days. Thus, we assumed that sleep quality is related to the performance of football athlete. To investigate if there is correlation between sleep quality and performance in football athletes, we undertook a cross-sectional analysis of 100 male football athletes. Sleep quality was assessed by Pittsburgh Sleep Quality Index questionnaire, and athlete’s performance was quantified by oxygen uptake capacity (VO₂max) measurement by bleep test, while resting heart rate and blood pressure were measured with digital sphygmomanometer. There was significant correlation between sleep quality and all performance indicators including resting heart rate, systolic blood pressure, diastolic blood pressure, and VO₂max (p < 0.001). In Pearson correlation, we found that sleep quality affects 14% of resting heart rate (r = 0.384) (p < 0.001), 17% of systolic pressure (r = 0.421) (p < 0.001), 21% of diastolic pressure (r = 4.69) (p < 0.001), and 16% of VO₂max score (r = − 0.412) (p < 0.001). By Gamma correlation, we found that almost all of the participants with good sleep quality have normal resting heart rate, normal blood pressure, and either superior or excellent VO₂max score (r_{heart rate} = 0.768) (p = 0.002), (r_systolic = 0.773) (p < 0.001), (r_diastolic = 1.00) (p < 0.001), (r_VO2max = 0.68) (p < 0.001). There was correlation between sleep quality and performance of football athlete.

运动员有过度训练的风险。因此，运动员需要制定一种策略以在训练后获得更好的状态。如果通过良好的睡眠获得最佳恢复，则运动员可以参加其他体育活动或在接下来的几天增加运动量。因此，我们假设睡眠质量与足球运动员的表现有关。为了调查足球运动员的睡眠质量与表现之间是否存在相关性，我们对100名男足球运动员进行了横断面分析。睡眠质量通过匹兹堡睡眠质量指数问卷进行评估，运动员的表现通过摄氧量（VO ₂最大值）通过bleep测试进行测量，而静息心率和血压则通过数字血压计进行测量。睡眠质量与所有性能指标（包括静息心率，收缩压，舒张压和VO ₂ max  ）之间存在显着相关性（p <0.001）。在Pearson相关性中，我们发现睡眠质量会影响静息心率的14％（r  = 0.384）（p  <0.001），收缩压的17％（r  = 0.421）（p  <0.001），舒张压的21％（r  = 4.69）（p  <0.001）和VO ₂最大分数的16％（r  = − 0.412）（p <0.001）。通过Gamma关联，我们发现几乎所有睡眠质量良好的参与者均具有正常的静息心率，正常的血压以及VO ₂最大得分（优或优秀）（r_心率 = 0.768）（p  = 0.002），（r_收缩压 = 0.773）（p  <0.001），（r_舒张压 = 1.00）（p  <0.001），（r _VO2max  = 0.68）（p  <0.001）。睡眠质量与足球运动员的表现之间存在相关性。