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Open AccessArticle

Effects of Pre-Exercise High and Low Glycaemic Meal on Intermittent Sprint and Endurance Exercise Performance

1
Physical Education and Sports Science Academic Group, National Institute of Education, Nanyang Technological University, Singapore 637616, Singapore
2
Athlete Health and Performance Centre, Aspetar Orthopaedic and Sport Medicine Hospital, Doha 29222, Qatar
3
Sport Science and Medicine, Singapore Sport Institute, Sport Singapore, Singapore 397630, Singapore
*
Author to whom correspondence should be addressed.
Sports 2019, 7(8), 188; https://doi.org/10.3390/sports7080188
Received: 17 June 2019 / Revised: 29 July 2019 / Accepted: 1 August 2019 / Published: 5 August 2019
(This article belongs to the Special Issue Nutrition Intervention in Exercise)
The purpose of this study is to investigate the effects of ingesting either a high glycaemic index (HGI) or low glycaemic index (LGI) carbohydrate meal (preceding a 12 h overnight fast and where the meal was ingested 45-min prior to activity) on intermittent sprint and endurance exercise performance. Ten male varsity athletes from intermittent sports (age 23.6 ± 1.7 years, VO2max 51.9 ± 4.7 mL·kg−1·min−1) underwent a peak velocity (Vpeak) test and familiarisation session, followed by two experimental sessions in random order. Experimental sessions involved the ingestion of either an HGI or LGI meal, followed by the completion of the modified Loughborough Intermittent Shuttle Test (mLIST). There was no significant difference between HGI or LGI meals on sprint times (p = 0.62) and distance to exhaustion (p = 0.54) in the mLIST. Exercise heart rate, blood lactate and ratings of perceived exertion were also similar between the two meal trials throughout the mLIST (all p > 0.05). Subjective ratings of hunger, fullness, satiety and satisfaction were also not significantly different between the two meals. In conclusion, consuming either an HGI or LGI meal after a prolonged 12 h fast and ingesting the meal 45 min prior to exercise did not differ in either physiological, subjective and intermittent sprint and endurance performance outcomes. View Full-Text
Keywords: pre-ingestion; carbohydrate; glucose response; fasting; heart rate; ratings of perceived exertion pre-ingestion; carbohydrate; glucose response; fasting; heart rate; ratings of perceived exertion
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Chua, M.T.; Balasekaran, G.; Ihsan, M.; Aziz, A.R. Effects of Pre-Exercise High and Low Glycaemic Meal on Intermittent Sprint and Endurance Exercise Performance. Sports 2019, 7, 188.

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