Pre-exercise glycerol hydration improves cycling endurance time

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Bibliographische Detailangaben
Deutscher übersetzter Titel:Hydratation durch Glyzerineinnahme vor Belastung verbessert die Ausdauerzeit beim Radfahren
Autor:Montner, P.; Stark, D.M.; Riedesel, M.L.; Murata, G.; Robergs, R.; Timms, M.; Chick, T.W.
Erschienen in:International journal of sports medicine
Veröffentlicht:17 (1996), 1, S. 27-33, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource Elektronische Ressource (online)
Sprache:Englisch
ISSN:0172-4622, 1439-3964
DOI:10.1055/s-2007-972804
Schlagworte:
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Erfassungsnummer:PU199602105701
Quelle:BISp

Abstract des Autors

The effects of glycerol ingestion (GEH) on hydration and subsequent cycle ergometer submaximal load exercise were examined in well conditioned subjects. We hypothesized that GEH would reduce physiologic strain and increase endurance. The purpose of Study I (n = 11) was to determine if pre-exercise GEH (1.2 gm/kg glycerol in 26 ml/kg solution) compared to pre-exercise placebo hydration (PH) (26 ml/kg of aspartame flavored water) lowered heart rate (HR), lowered rectal temperature (Tc), and prolonged endurance time (ET) during submaximal load cycle ergometry. The purpose of Study II (n = 7) was to determine if the same pre-exercise regimen followed by carbohydrate oral replacement solution (ORS) during exercise also lowered HR, Tc, and prolonged ET. Both studies were double-blind, randomized, crossover trials, performed at an ambient temperature of 23.5 - 24.5ø C, and humidity of 25 - 27%. Mean HR was lower by 2.8 +/- 0.4 beats/min after GEH in Study I and by 4.4 +/- 1.1 beats/min in Study II. Endurance time was prolonged after GEH in Study I (93.8 +/- 14 min vs. 77.4 +/- 9 min, p = 0.049) and in Study II (123.4 +/- 17 min vs. 99.0 +/- 11 min, p = 0.03). Rectal temperature did not differ between hydration regimens in both Study I and Study II. Thus, pre-exercise glycerol-endhanced hyperhydration lower HR and prolongs ET even when combined with ORS during exercise. The regimens tested in this study could potentially be adapted for endurance activities. Verf.-Referat