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Cited by 17Thermoregulation and physiological responsesCardiovascular and exercise physiologyExercise and Physiological Responses

Effects of isomaltulose ingestion on postexercise hydration state and heat loss responses in young men

Amano, Tatsuro, Sugiyama, Yuki, Okumura, Junya, Fujii, Naoto, Kenny, Glen P., Nishiyasu, Takeshi, Inoue, Yoshimitsu, Kondo, Narihiko +3 more·2019·Experimental Physiology
DOI 10.1113/ep087843
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Abstract

NEW FINDINGS: What is the central question of this study? What are the effects of isomaltulose, an ingredient in carbohydrate-electrolyte beverages to maintain glycaemia and attenuate the risk of dehydration during exercise heat stress, on postexercise rehydration and physiological heat loss responses? What is the main finding and its importance? Consumption of a 6.5% isomaltulose-electrolyte beverage following exercise heat stress restored hydration following a 2 h recovery as compared to a 2% solution or water only. While the 6.5% isomaltulose-electrolytes increased plasma volume and plasma osmolality, which are known to modulate postexercise heat loss, sweating and cutaneous vascular responses did not differ between conditions. Consequently, ingestion beverages containing 6.5% isomaltulose-electrolytes enhanced postexercise rehydration without affecting heat loss responses. ABSTRACT: Isomaltulose is a disaccharide carbohydrate widely used during exercise to maintain glycaemia and hydration. We investigated the effects of ingesting a beverage containing isomaltulose and electrolytes on postexercise hydration state and physiological heat loss responses. In a randomized, single-blind cross-over design, 10 young healthy men were hypohydrated by performing up to three 30 min successive moderate-intensity (50% heart rate reserve) bouts of cycling, each separated by 10 min, while wearing a water-perfusion suit heated to 45°C. The protocol continued until a 2% reduction in body mass was achieved. Thereafter, participants performed a final 15 min moderate-intensity exercise bout followed by a 2 h recovery. Following cessation of exercise, participants ingested a beverage consisting of (i) water only (Water), (ii) 2% isomaltulose (CHO-2%), or (iii) 6.5% isomaltulose (CHO-6.5%) equal to the volume of 2% body mass loss within the first 30 min of the recovery. Changes in plasma volume (ΔPV) after fluid ingestion were greater for CHO-6.5% compared with CHO-2% (120 min postexercise) and Water (90 and 120 min) (all P ≤ 0.040). Plasma osmolality remained elevated with CHO-6.5% compared with consumption of the other beverages at 30 and 90 min postexercise (all P ≤ 0.050). Urine output tended to be reduced with CHO-6.5% compared to other fluid conditions (main effect, P = 0.069). Rectal and mean skin temperatures, chest sweat rate and cutaneous perfusion did not differ between conditions (all P > 0.05). In conclusion, compared with CHO-2% and Water, consuming a beverage consisting of CHO-6.5% and electrolytes during recovery under heat stress enhances PV recovery without modulating physiological heat loss responses.

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  • Ingestion of a 6.5% w/v isomaltulose drink plus electrolytes (Na+, Ca2+, Mg2+ and K+) may optimize post-exercise rehydration without affecting heat loss responses in healthy and physically active young men.

    “In addition, Amano et al. (2019) demonstrated that the ingestion of a 6.5% w/v isomaltulose drink plus electrolytes (Na+, Ca2+, Mg2+ and K+) may optimize post-exercise rehydration without affecting heat loss responses in healthy and physically active young men [54].”

    From The 4R’s Framework of Nutritional Strategies for Post-Exercise Recovery: A Review with Emphasis on New Generation of Carbohydrates (2020) · cites this paper as [54]

  • Ingestion of a 6.5% w/v isomaltulose drink plus electrolytes (Na+, Ca2+, Mg2+ and K+) may optimize post-exercise rehydration without affecting heat loss responses in healthy and physically active young men.

    “In addition, Amano et al. (2019) demonstrated that the ingestion of a 6.5% w/v isomaltulose drink plus electrolytes (Na+, Ca2+, Mg2+ and K+) may optimize post-exercise rehydration without affecting heat loss responses in healthy and physically active young men [54].”

    From The 4R’s Framework of Nutritional Strategies for Post-Exercise Recovery: A Review with Emphasis on New Generation of Carbohydrates (2020) · cites this paper as Amano et al. (2019)

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Authors
Amano, T., Sugiyama, Y., Okumura, J., Fujii, N., Kenny, G. P., Nishiyasu, T., Inoue, Y., Kondo, N., Sasagawa, K., Enoki, Y., & Maejima, D.
Affiliations
  • Niigata University (JP)
  • University of Tsukuba (JP)
  • University of Ottawa (CA)
  • Osaka International University (JP)
  • Kobe University (JP)
  • Bourbon Corporation (Japan) (JP)
Corresponding author
Amano, Tatsuro
ORCID
Venue
Experimental Physiology
Publisher
Wiley
Published
2019-08-26
Volume
104
Issue
10
Pages
1494-1504
ISSN
  • 0958-0670 (ISSN-L)
  • 1469-445X
DOI
10.1113/ep087843
OpenAlex
W2968319883
Cited by
17
References
39
Citations by year
2024: 2 · 2023: 2 · 2022: 2 · 2021: 7 · 2020: 4
FWCI
2.23
Type
journal article
Language
en
Open access
closed
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor)
Locations
  • Experimental Physiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (18H03146)
Topics
  • Health Sciences › Medicine › Physiology › Thermoregulation and physiological responses
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
Keywords
exercise in the heat, heat loss, plasma volume, plasma osmolality, carbohydrate-electrolyte beverage, hypohydration, sweating, urine output, glycemia, fluid intake, post-exercise recovery, young men, cycling exercise
MeSH terms
Beverages, Bicycling, Body Temperature, Body Temperature Regulation, Body Water, Body Weight, Dietary Carbohydrates, Fluid Therapy, Heart Rate, Humans, Isomaltose, Male, Osmolar Concentration, Plasma Volume, Sweating, Urodynamics, Water-Electrolyte Balance, Exercise, Single-Blind Method, Cross-Over Studies, Young Adult

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