תזונה ותוספים The Effects of Pre-Exercise Glycemic Index Food on Running Capacity.

[Mike Bikov]

Int J Sports Med. 2011 May 17. [Epub ahead of print]
The Effects of Pre-Exercise Glycemic Index Food on Running Capacity.
Karamanolis IA, Laparidis KS, Volaklis KA, Douda HT, Tokmakidis SP.
Source

Physical Education and Sport Science, Democritus University of Thrace, Komotini, Greece.
Abstract

This study examined the effects of pre-exercise food on different glycemic indexes (GI) on exercise metabolism and endurance running capacity. 9 subjects performed 3 exercise trials on different days 15 min after ingesting: lentils, (LGI), potatoes, (HGI), and placebo. Each subject ingested an equal amount of each food (1 g/kg body mass) and ran on a level treadmill for 5 min at 60%, 45 min at 70% and then at 80% of VO (2max) until exhaustion. Serum glucose concentrations were higher ( P<0.01) 15 min after the HGI trial compared to the LGI and placebo trials. In addition, serum glucose levels were higher ( P<0.05) during the LGI trial at the time of exhaustion compared to the HGI and placebo trials. Plasma insulin levels, 15 min after ingestion, were higher ( P<0.001) in the HGI trial as compared to the LGI and placebo trials. Exercise time was longer during the LGI trial ( P<0.05) compared to the placebo, but the time to exhaustion in the HGI condition did not differ from the placebo (LGI: 90.0±7.9; HGI: 81.8±5; placebo: 73.0±6.4 min). These results suggest that lentils, the LGI food, ingested 15 min before prolonged exercise maintained euglycemia during exercise and enhanced endurance running capacity.

© Georg Thieme Verlag KG Stuttgart · New York.

PMID:
21590643
[PubMed - as supplied by publisher]​

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