The effects of creatine and glycerol hyperhydration on running economy in well trained endurance runners

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The effects of creatine and glycerol hyperhydration on running economy in well trained endurance runners

BACKGROUND Ingestion of creatine (Cr) and glycerol (Gly) has been reported to be an effective method in expanding water compartments within the human body, attenuating the rise in heart rate (HR) and core temperature (Tcore) during exercise in the heat. Despite these positive effects, a substantial water retention could potentially impair endurance performance through increasing body mass (BM) ...

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Effects of sodium citrate ingestion before exercise on endurance performance in well trained college runners.

OBJECTIVE To test the hypothesis that sodium citrate administered two hours before exercise improves performance in a 5 km running time trial. METHODS A total of 17 male well trained college runners (mean (SD) O(2)MAX 61.3 (4.9) ml/kg/min) performed a 5 km treadmill run with and without sodium citrate ingestion in a random, double blind, crossover design. In the citrate trial, subjects consum...

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Effect of speed endurance training and reduced training volume on running economy and single muscle fiber adaptations in trained runners

The aim of the present study was to examine whether improved running economy with a period of speed endurance training and reduced training volume could be related to adaptations in specific muscle fibers. Twenty trained male (n = 14) and female (n = 6) runners (maximum oxygen consumption (VO2 -max): 56.4 ± 4.6 mL/min/kg) completed a 40-day intervention with 10 sessions of speed endurance train...

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Relationship between 800-m running performance and running economy during high-intensity running in well-trained middle-distance runners

Running economy (RE) at an intensity above the lactate threshold (LT) is reported to be the most important aerobic capacity for estimating 1,500-m running performance. The reason that the RE at intensity better reflects the energy metabolism during a 1,500-m run, is that it is performed above the LT intensity running. This study clarified the relationship between an 800-m run, which is performe...

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A meta-analysis of the effects of glycerol-induced hyperhydration on fluid retention and endurance performance.

The authors determined, through a meta-analytic approach, whether glycerol-induced hyperhydration (GIH) enhances fluid retention and increases endurance performance (EP) significantly more than water-induced hyperhydration (WIH). Collectively, studies administered 23.9 +/- 2.7 mL of fluid/kg body weight (BW) with 1.1 +/- 0.2 g glycerol/kg BW, and hyperhydration was measured 136 +/- 15 min after...

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ژورنال

عنوان ژورنال: Journal of the International Society of Sports Nutrition

سال: 2011

ISSN: 1550-2783

DOI: 10.1186/1550-2783-8-24