Özet:

The aim of this study was to determine the acute effect of fatigue resulting from anaerobic exercise on the levels of mental resilience of athletes. The research was conducted according to the experimental model of the pre-test-sontest control group. In this regard; the control group was formed by the athlete with the average age of 21.1±1.2 years, the length of 171.4±8.2 cm, the body weight of 65.4±9.6 kg and the sports experience time of 8.4±1.7 years; the experiment group was formed by the athlete with the average age of 21.3±0.9 years, the length of 172.7±6.8 cm, the body weight of 67.9±9.2 kg and the sports experience time of 8.3±1.6 years.                 The Running Anaerobic Sprint Test was applied to athletes as an anaerobic exercise. The fatigue level was determined by the heart rate. The heart rate was determined by the FT7M model heart rate meter. Mental Resistance was developed by Madrigal, Hamill and Gill (2013) and identified by the Mental Resistance Scale by the Turkish validity and reliability study by Erdoğan (2016).                 The data processing was done in the SPSS 15.0 statistical package for Windows. The acute effect of fatigue on athletes' mental resilience levels was determined by an independent sampling t-test according to the experimental design. It is considered to be p<0.01 According to statistical analysis, a significant decrease in athlete's mental resilience levels (p<0.01) in maximum severe anaerobic exercise fatigue was observed by an average of 11.1 ± 6.5 points. As a result, it can be said that the fatigue that occurs after anaerobic exercise can sharply decrease athletes’ levels of mental endurance.