Cardiorespiratory Responses to Downhill versus Uphill Running in Endurance Athletes

Autor/inn/en	Lemire, Marcel; Lonsdorfer-Wolf, Evelyne; Isner-Horobeti, Marie-Eve; Kouassi, Blah Y. L.; Geny, Bernard; Favret, Fabrice; Dufour, Stéphane P.
Titel	Cardiorespiratory Responses to Downhill versus Uphill Running in Endurance Athletes
Quelle	In: Research Quarterly for Exercise and Sport, 89 (2018) 4, S.511-517 (7 Seiten) PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Lemire, Marcel)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0270-1367
DOI	10.1080/02701367.2018.1510172
Schlagwörter	Physical Activities; Exercise Physiology; Athletics; Athletes; Human Body; Metabolism; Performance + Suchen Sie Ihr Suchwort? Sportphysiologie; Leichtathletik; Athlet; Menschlicher Körper; Stoffwechsel; Achievement; Leistung
Abstract	Purpose: Mountain running races are becoming increasingly popular, although our understanding of the particular physiology associated with downhill running (DR) in trained athletes remains scarce. This study explored the cardiorespiratory responses to high-slope constant velocity uphill running (UR) and DR. Method: Eight endurance athletes performed a maximal incremental test and 2 15-min running bouts (UR, +15%, or DR, -15%) at the same running velocity (8.5 ± 0.4 km·h[superscipt -1]). Oxygen uptake (VO[subscript 2]), heart rate (HR), and ventilation rates (V[subscript E]) were continuously recorded, and blood lactate (bLa) was measured before and after each trial. Results: Downhill running induced a more superficial V[subscript E] pattern featuring reduced tidal volume (p < 0.05, ES = 6.05) but similar respiratory frequency (p > 0.05, ES = 0.68) despite lower V[subscript E] (p < 0.05, ES = 5.46), VO[subscript 2] (p < 0.05, ES = 12.68), HR (p < 0.05, ES = 6.42), and bLa (p < 0.05, ES = 1.70). A negative slow component was observed during DR for VO[subscript 2] (p < 0.05, ES = 1.72) and HR (p < 0.05, ES = 0.80). Conclusions: These results emphasize the cardiorespiratory responses to DR and highlight the need for cautious interpretation of VO[subscript 2], HR, and V[subscript E] patterns as markers of exercise intensity for training load prescription and management. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01