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Original Article   

The Journal of Sports Medicine and Physical Fitness 2022 Jul 11

DOI: 10.23736/S0022-4707.22.13822-3


lingua: Inglese

Temporal patterns of fatigue in repeated sprint ability testing in soccer players. Acute effects of different initial heart rates: a comparison between genders

Bruno RUSCELLO 1, 2, 3, 4 , Laura PANTANELLA 1, Pietro IEMME 1, Cristoforo FILETTI 1, 2, 5, Marco PORTA 2, Stefano D’OTTAVIO 1, 4, Lorenzo MARCELLI 3, 6, Gennaro APOLLARO 1, Gabriele MORGANTI 1, Alberto GROSSI 1, Mario ESPOSITO 1, 4, 7, Elvira PADUA 1, 2

1 School of Sports and Exercise Sciences, Faculty of Medicine and Surgery, Tor Vergata University, Rome, Italy; 2 School of Sports and Exercise Sciences, San Raffaele University, Rome, Italy; 3 Department of Industrial Engineering, Faculty of Engineering, Tor Vergata University, Rome, Italy; 4 LUISS SportLab, LUISS University, Rome, Italy; 5 Paris Saint Germain
Football Club, Paris, France; 6 School of Sports and Exercise Sciences, UNICUSANO, Rome, Italy; 7 Faculty of Medicine, University of Ostrava, Ostrava, Czech Republic


BACKGROUND: Repeated sprint ability (RSA) in soccer is deemed fundamental to ensure high level of performance. The aim of this study was to investigate the acute effects of two different initial heart rates on fatigue when testing RSA in males and females’ soccer players and to compare the respective patterns of fatigue.
METHODS: 19 female soccer players (age: 22.5±3.3 years, height 163.9±7.3 cm, body weight 54.3±6.4 kg, BMI 20.6±1.5 kg·m-2) and 15 male soccer players (Age: 17.9±1.5 years, height 175.9±5.8 cm, body weight 68.5±9.6 kg, BMI 22.3±1.5 kg·m-2) participated in this study. Heart rates reached at the end of two different warm-up protocols (~90 vs ~ 60% HRmax), have been selected and the respective RSA performances were compared, within and between the groups of participants. Two sets of ten shuttle-sprints (15+15 m) with a 1:3 exercise to rest ratio with different initial HR% were administered, in different days, in randomized order. To compare the different sprint performances, we employed the calculated Fatigue Index (FI%). Blood lactate concentration (BLa-) was also measured before and after testing, to compare metabolic energy.
RESULTS: Significant differences among trials within each set (P<0.01) were found in both genders. Differences between sets were found in male players, (Factorial ANOVA 2x5; P<0.001), not in female. BLa- after warm-up was higher in 90% vs. 60% HRmax (P<0.05), in both genders but at the completion of RSA tests (after 3 minutes) the differences were not significant (P>0.05).
CONCLUSIONS: difference between genders were found, suggesting specific approach in testing and training RSA in soccer players.

KEY WORDS: RSA testing; Blood lactate concentration; Warmup protocol

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