PMID- 37776545
OWN - NLM
STAT- Publisher
LR  - 20230930
IS  - 1930-613X (Electronic)
IS  - 0026-4075 (Linking)
DP  - 2023 Sep 30
TI  - Carbohydrate or Electrolyte Rehydration Recovers Plasma Volume but Not 
      Post-immersion Performance Compared to Water After Immersion Diuresis.
LID - usad379 [pii]
LID - 10.1093/milmed/usad379 [doi]
AB  - INTRODUCTION: We tested the hypothesis that a carbohydrate (CHO: 6.5%) or 
      carbohydrate-electrolyte (CHO + E: 6.5% + 50 mmol/L NaCl) drink would better 
      recover plasma volume (PV) and exercise performance compared to water (H2O) after 
      immersion diuresis. METHODS: Twelve men (24 +/- 2 years; 82.4 +/- 15.5 kg; and 
      V̇O2max: 49.8 +/- 5.1 mL . kg-1 . min-1) completed four experimental visits: a 
      no-immersion control (CON) and three 4-h cold-water (18.0  degrees C) immersion trials 
      (H2O, CHO, and CHO + E) followed by exercise in a warm environment (30  degrees C, 50% 
      relative humidity). The exercise was a 60-minute loaded march (20.4 kg; 55% 
      VO2max) followed by a 10-minute intermittent running protocol. After immersion, 
      subjects were rehydrated with 100% of body mass loss from immersion diuresis 
      during the ruck march. PV is reported as a percent change after immersion, after 
      the ruck march, and after the intermittent running protocol. The intermittent 
      running protocol distance provided an index of exercise performance. Data are 
      reported as mean +/- SD. RESULTS: After immersion, body mass loss was 2.3 +/- 0.7%, 
      2.3 +/- 0.5%, and 2.3 +/- 0.6% for H2O, CHO, and CHO + E. PV loss after immersion was 
      19.8 +/- 8.5% in H2O, 18.2 +/- 7.0% in CHO, and 13.9 +/- 9.3% in CHO + E, which was 
      reduced after the ruck march to 14.7 +/- 4.7% (P = .13) in H2O, 8.8 +/- 8.3% 
      (P < .01) in CHO, and 4.4 +/- 10.9% (P = .02) in CHO + E. The intermittent running 
      protocol distance was 1.4 +/- 0.1 km in CON, 1.4 +/- 0.2 km in H2O, 1.4 +/- 0.1 km in 
      CHO, and 1.4 +/- 0.2 km in CHO + E (P = .28). CONCLUSIONS: Although CHO and CHO + E 
      better restored PV after immersion, post-immersion exercise performance was not 
      augmented compared to H2O, highlighting that fluid replacement following 
      immersion diuresis should focus on restoring volume lost rather than fluid 
      constituents.
CI  - (c) The Association of Military Surgeons of the United States 2023. All rights 
      reserved. For permissions, please e-mail: journals.permissions@oup.com.
FAU - Wheelock, Courtney E
AU  - Wheelock CE
AD  - Center for Research and Education in Special Environments (CRESE), Department of 
      Exercise and Nutrition Sciences, University at Buffalo, Buffalo, NY 14214, USA.
FAU - Lavoie, Elizabeth M
AU  - Lavoie EM
AD  - Center for Research and Education in Special Environments (CRESE), Department of 
      Exercise and Nutrition Sciences, University at Buffalo, Buffalo, NY 14214, USA.
FAU - Stooks, Jocelyn
AU  - Stooks J
AD  - Center for Research and Education in Special Environments (CRESE), Department of 
      Exercise and Nutrition Sciences, University at Buffalo, Buffalo, NY 14214, USA.
FAU - Schwob, Jacqueline
AU  - Schwob J
AD  - Center for Research and Education in Special Environments (CRESE), Department of 
      Exercise and Nutrition Sciences, University at Buffalo, Buffalo, NY 14214, USA.
FAU - Hess, Hayden W
AU  - Hess HW
AD  - Center for Research and Education in Special Environments (CRESE), Department of 
      Exercise and Nutrition Sciences, University at Buffalo, Buffalo, NY 14214, USA.
FAU - Pryor, Riana R
AU  - Pryor RR
AD  - Center for Research and Education in Special Environments (CRESE), Department of 
      Exercise and Nutrition Sciences, University at Buffalo, Buffalo, NY 14214, USA.
FAU - Hostler, David
AU  - Hostler D
AD  - Center for Research and Education in Special Environments (CRESE), Department of 
      Exercise and Nutrition Sciences, University at Buffalo, Buffalo, NY 14214, USA.
LA  - eng
GR  - N00024-20-C-4307/Naval Sea Systems Command/
GR  - N00024-20-C-4307/Naval Sea Systems Command/
PT  - Journal Article
DEP - 20230930
PL  - England
TA  - Mil Med
JT  - Military medicine
JID - 2984771R
SB  - IM
EDAT- 2023/10/01 04:44
MHDA- 2023/10/01 04:44
CRDT- 2023/09/30 14:53
PHST- 2023/07/19 00:00 [received]
PHST- 2023/09/06 00:00 [revised]
PHST- 2023/09/15 00:00 [accepted]
PHST- 2023/10/01 04:44 [medline]
PHST- 2023/10/01 04:44 [pubmed]
PHST- 2023/09/30 14:53 [entrez]
AID - 7287221 [pii]
AID - 10.1093/milmed/usad379 [doi]
PST - aheadofprint
SO  - Mil Med. 2023 Sep 30:usad379. doi: 10.1093/milmed/usad379.