Özet:

The aim of this study is to examine the acute effect of the morning and evening Yo-Yo intermittent recovery test on level 1 (YIRT1) hematological parameters. Eighteen male soccer player volunteers from Serinhisar soccer team who played in the Denizli Super Amateur league participated voluntarily. YIRT1 was applied to the athletes on two different days, morning and evening. Blood samples were collected before, during and 2 hours after the test. During the test, the total distance was recorded. At the end of the test, lactate values were measured. Leukocyte (WBC), Neutrophil (NEU), Neutrophil percent (NEU %), Lymphocyte (LYM), Lymphocyte percent (LYM %), Erythrocyte (RBC), Hemoglobin (HGB), Hematocrit (HCT) and Platelet (PLT) values were examined for complete blood count. In the statistical analysis, the normality distribution of the data was examined with Shapiro-Wilk test. Since the data showed a normal distribution, t-test for dependent groups and one-way analysis of variance (ANOVA) for repeated measures were used to compare the differences between dependent groups. There was a statistically significant difference between morning and evening measurements in hematological parameters, blood lactate and distance traveled after the YIRT1 test (p<0.05). As a result, it can be suggested that the YIRT1 test to be applied to football players should be done in the evening. This test, which is used to determine the physical capacity of the players, has been found to affect the hematological values.

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