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Movement Patterns and Metabolic Responses During an International Rugby Sevens Tournament

Abstract : Purpose: To investigate the running demands and associated metabolic perturbations during an official rugby sevens tournament. Methods: Twelve elite players participated in 7 matches wearing GPS units. Maximal sprinting speed (MSS) and maximal aerobic speed (MAS) were measured. High-intensity threshold was individualized relative to MAS (>100% of MAS), and veryhigh-intensity distance was reported relative to both MAS and MSS. Blood samples were taken at rest and after each match. Results: Comparison of prematch and postmatch samples revealed significant (P < .01) changes in pH (7.41–7.25), bicarbonate concentration ([HCO3–]) (24.8–13.6 mmol/L), and lactate concentration ([La]) (2.4–11.9 mmol/L). Mean relative total distance covered was 91 ± 13 m/min with ~17 m/min at high-intensity. Player status (whole-match or interchanged players), match time, and total distance covered had no significant impact on metabolic indices. Relative distance covered at high intensity was negatively correlated with pH and [HCO3–] (r = .44 and r = .42, respectively; P < .01) and positively correlated with [La] (r = .36; P < .01). Total distance covered and distance covered at very high intensity during the 1-min peak activity in the last 3 min of play were correlated with [La] (r = .39 and r = .39, respectively; P < .01). Conclusions: Significant alterations in blood-metabolite indices from prematch to postmatch sampling suggest that players were required to tolerate a substantial level of acidosis related to metabolite accumulation. In addition, the ability to produce energy via the glycolytic energy pathway seems to be a major determinant in match-related running performance.
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https://hal-insep.archives-ouvertes.fr/hal-02558289
Contributeur : Valérie Quaireau <>
Soumis le : mercredi 29 avril 2020 - 14:34:43
Dernière modification le : jeudi 30 avril 2020 - 01:41:55

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Anthony Couderc, Claire Thomas, Mathieu Lacome, Julien Piscione, Julien Robineau, et al.. Movement Patterns and Metabolic Responses During an International Rugby Sevens Tournament. International Journal of Sports Physiology and Performance, Human Kinetics, 2017, 12 (7), pp.901-907. ⟨10.1123/ijspp.2016-0313⟩. ⟨hal-02558289⟩

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