TY - JOUR
T1 - The effects of isomaltulose ingestion on gastric parameters and cycling performance in young men
AU - Miyashita, Masashi
AU - Hamada, Yuka
AU - Fujihira, Kyoko
AU - Namura, Saki
AU - Sakazaki, Miki
AU - Miyasaka, Kiyoaki
AU - Nagai, Yukie
N1 - Funding Information:
M.S K.M. and Y.N. are employees of Mitsui Sugar Co Ltd. and were not involved in the data acquisition, statistical analysis and writing of the manuscript - M.S K.M. and Y.N. were involved in the study design, the interpretation of the results and the decision to submit the manuscript for publication. M.M. has no professional relationships with the company involved in this study. M.M. received a research grant from Mitsui Sugar Co Ltd.
Publisher Copyright:
© 2019
PY - 2019/7
Y1 - 2019/7
N2 - Background/Objective: Isomaltulose is a disaccharide with a low glycaemic index and plays a role in maintaining postprandial glucose. The maintenance of glucose availability during prolonged exercise has been shown to enhance exercise performance. The present study compared the effects of pre-exercise isomaltulose versus maltodextrin ingestion on gastric parameters and cycling performance in young men. Methods: Fourteen young men (mean ± S.D., age 23 ± 2 years) performed 60 min of continuous cycling at 75% of maximum heart rate followed by a 15-min exercise performance test while ingesting a 500-mL of water containing 100 mg of 13C-sodium acetate with either 50 g of isomaltulose or 50 g of maltodextrin. Gastrointestinal discomfort was assessed periodically using an 11-point visual analogue scale throughout the study. The gastric emptying rate was evaluated periodically with the 13C-sodium acetate breath test. For the exercise performance test, participants were instructed to pedal a cycle ergometer, exerting as much effort as possible at a self-selected pace. Results: Plasma glucose and insulin concentrations measured at 30 min after ingestion were lower in the isomaltulose trial than in the maltodextrin trial. There were no differences in mean power output during the exercise performance test, gastric emptying rate or the subjective feelings of gastrointestinal discomfort between both trials. Conclusion: Under the current exercise protocol, pre-exercise ingestion of isomaltulose compared with maltodextrin provided no additional benefit relative to gastric emptying or aerobic exercise performance. Both isomaltulose and maltodextrin ingestion did not influence gastrointestinal distress during 60 min of cycling and performance test.
AB - Background/Objective: Isomaltulose is a disaccharide with a low glycaemic index and plays a role in maintaining postprandial glucose. The maintenance of glucose availability during prolonged exercise has been shown to enhance exercise performance. The present study compared the effects of pre-exercise isomaltulose versus maltodextrin ingestion on gastric parameters and cycling performance in young men. Methods: Fourteen young men (mean ± S.D., age 23 ± 2 years) performed 60 min of continuous cycling at 75% of maximum heart rate followed by a 15-min exercise performance test while ingesting a 500-mL of water containing 100 mg of 13C-sodium acetate with either 50 g of isomaltulose or 50 g of maltodextrin. Gastrointestinal discomfort was assessed periodically using an 11-point visual analogue scale throughout the study. The gastric emptying rate was evaluated periodically with the 13C-sodium acetate breath test. For the exercise performance test, participants were instructed to pedal a cycle ergometer, exerting as much effort as possible at a self-selected pace. Results: Plasma glucose and insulin concentrations measured at 30 min after ingestion were lower in the isomaltulose trial than in the maltodextrin trial. There were no differences in mean power output during the exercise performance test, gastric emptying rate or the subjective feelings of gastrointestinal discomfort between both trials. Conclusion: Under the current exercise protocol, pre-exercise ingestion of isomaltulose compared with maltodextrin provided no additional benefit relative to gastric emptying or aerobic exercise performance. Both isomaltulose and maltodextrin ingestion did not influence gastrointestinal distress during 60 min of cycling and performance test.
KW - Exercise performance
KW - Gastrointestinal discomfort
KW - Isomaltulose
KW - Metabolic response
KW - Stable isotope
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U2 - 10.1016/j.jesf.2019.06.001
DO - 10.1016/j.jesf.2019.06.001
M3 - Article
AN - SCOPUS:85067832536
VL - 17
SP - 101
EP - 107
JO - Journal of Exercise Science and Fitness
JF - Journal of Exercise Science and Fitness
SN - 1728-869X
IS - 3
ER -