Özet:

The aim of this study was to investigate the relationship between physiological responses and energy system contributions on sprint performance of football players in the run-based anaerobic sprint test (RAST). Twenty male footballers (age: 21.2 ± 3.4 yrs) playing football in different leagues participated in the study. The football players performed a 6x35m sprint protocol with 10sec recovery intervals. RAST performance (Total Time, Best Time, Average Time, Fatigue Index) and power values (Peak Power, Average Power, Minimum Power, Force Impulse) were measured during the tests. Contributions of oxidative, glycolytic and ATP-PCr systems were calculated from oxygen consumption (VO2) and lactate (LA) values and recovery VO2 was calculated using a mono-exponential model. One-way analysis of variance (ANOVA) was used to compare RAST performance outcomes, recovery oxygen consumption, heart rate and lactate responses. Bonferroni multiple comparison test was used to identify possible differences when a significant effect was found in ANOVA. Pearson correlation test was used to determine the relationships between RAST results and contributions of energy systems. Statistically significant correlations were found between the contributions of energy systems and RAST results. During RAST, ATP-PCr and glycolytic system contribution was more dominant (overall: 69%, Spritnler only: 88%). RAST time performance and force impulse data were moderately positively correlated with anaerobic-based variables. Glycolytic system contribution was significantly associated with total time and mean time, and ATP-PCr energy system contribution was significantly associated with peak power, mean power, minimum power and force impulse. Anaerobic-based energy system contribution to the time and power performance values of the RAST test is significantly related to the achievement of optimal performance data. Understanding metabolic responses in the light of the data obtained as a result of the study may be important for developing targeted energy systems in training programmes involving high-intensity exercise.