In:
Physical Activity and Nutrition, Korea Society for Exercise Nutrition, Vol. 27, No. 2 ( 2023-06-30), p. 013-018
Abstract:
[Purpose] The purpose of the study was to investigate the effects of 4 weeks of lactate intake immediately after endurance exercise on maximal oxygen uptake (VO 〈 sub 〉 2max 〈 /sub 〉 ) in exercise performance.[Methods] Seven-week-old mice from the Institute of Cancer Research (ICR) were randomly divided into four groups: vehicle intake (SE/CON), lactate intake (SE/LAC), endurance exercise with vehicle intake (EX/ CON), and lactate intake with endurance exercise (EX/ LAC). Mice were subjected to 60-70% VO 〈 sub 〉 2max 〈 /sub 〉 endurance exercise with or without oral lactate intake 5 days/ week for 4 weeks. VO 〈 sub 〉 2max 〈 /sub 〉 measurements (VO 〈 sub 〉 2max 〈 /sub 〉 , time to exhaustion (TTE), respiratory exchange rate, fat oxidation, and carbohydrate oxidation) were recorded at the end of the study period. After 48 h of VO 〈 sub 〉 2max 〈 /sub 〉 measurement, the mice were sacrificed, and three different abdominal fat samples (epididymal, perirenal, and mesenteric) were collected.[Results] Body weight and abdominal fat mass did not differ between the groups. When measuring VO 〈 sub 〉 2max 〈 /sub 〉 , endurance exercise raised VO 〈 sub 〉 2max 〈 /sub 〉 , and lactate intake after endurance exercise increased TTE. The change in energy substrate utilization during VO 〈 sub 〉 2max 〈 /sub 〉 measurement demonstrated that although the respiratory exchange rate and fat oxidation were enhanced by lactate intake, there were no synergistic effects of lactate intake and endurance exercise.[Conclusion] Lactate intake immediately after endurance exercises can improve exercise performance, indicating the benefit of long-term exogenous lactate intake as an exercise supplement.
Type of Medium:
Online Resource
ISSN:
2733-7545
DOI:
10.20463/pan.2023.0013
Language:
English
Publisher:
Korea Society for Exercise Nutrition
Publication Date:
2023
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