Cardiac vagal index varies according to field position in male elite football players / índice vagal cardíaco varia com a posição em campo de jogadores da elite do futebol
Araújo, Claudio Gil Soares de; Bottino, Altamiro; Pinto, Flávio Gomes Ferreira.
MedicalExpress (São Paulo, Online)
; 5: mo18006, 2018. tab, graf
Artículo
en Inglés
| LILACS | ID: biblio-984748
BACKGROUND:
Cardiac vagal index (CVI) is supposedly higher in athletes and may differ between sports and/or between field positions.OBJECTIVE:
To compare CVI a) between elite football players vs. non-athletes and b) according to five football positions.METHOD:
242 football players of the first Brazilian/Angolan division were divided in five positions (N) goalkeepers (17), defenders (44), wingers (34), midfielders (87) and forwarders (60) and compared with 303 age-matched healthy non-athletes. CVI was estimated from a 4-second exercise test by quantifying the ratio of two cardiac cycle durations, before and at the end of a fast unloaded cycling exercise.RESULTS:
Football players had resting and maximal heart rates of, respectively, 59 and 190 bpm and measured VO2max of 62.2 mL/(kg.min). Players and non-athletes showed similar CVI results (median-[P25-P75]) - 1.63-[1.46-1.84] vs 1.61-[1.41-1.81] (p = 0.22). Wingers tended to have a higher CVI (1.84-[1.60-1.99]), especially when compared to defenders (1.53-[1.41-1.72] (p = 0.01). There was a modest non-physiologically relevant association between VO2max and CVI (r = 0.15).CONCLUSIONS:
Football players did not differ from non-athletes in CVI; however, among players, wingers were more often vagotonic, which may represent a hemodynamic advantage for match situations, where rapid heart rate transitions and faster oxygen delivery to muscles are required.
Biblioteca responsable:
BR1.1
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