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The influence of rehydration mode after exercise dehydration on cardiovascular function.
J Strength Cond Res. 2013 Aug; 27(8):2086-95.JS

Abstract

Our purpose was to compare the common modes of rehydration (REHY) on cardiovascular and fluid regulation recovery after exercise dehydration (EXDE). Twelve nonheat-acclimatized trained subjects (age: 23 ± 4 years, weight: 81.3 ± 3.7 kg, height: 180 ± 6 cm, V[Combining Dot Above]O2max: 56.9 ± 4.4 ml·min·kg , and body fat: 7.8 ± 3.0%) completed 20-hour fluid restriction and 2-hour EXDE to -4% body mass, and then were rehydrated to -2% body mass in a randomized, crossover design. The REHY methods included no fluid (NF), ad libitum, oral (OR), intravenous (IV), and a combination of IV and OR (IV + OR) of 1/2-normal saline (0.45% NaCl). The REHY occurred for 30 minutes, and the subjects were observed during rest for 30 minutes. Seated, standing, and mean arterial pressure (MAP) and blood pressure (BP) were measured every 15 minutes throughout REHY. Heart rate (HR), plasma arginine vasopressin concentration [AVP], and thirst perception were measured throughout REHY. The EXDE resulted in a body mass loss of 4.32 ± 0.22%. The REHY returned the subjects to -2.13 ± 0.47% body mass for controlled trials. Seated systolic BP was greater for IV + OR compared with that for OR (p = 0.015). Seated systolic BP and MAP during REHY showed that IV + OR was greater than OR, independent of time (p ≤ 0.011). Upon standing, IV + OR demonstrated a greater BP than both NF (p = 0.012) and OR (p = 0.031) did. The HR was reduced by IV and IV + OR to a greater extent than NF at REHY30 and REHY60 (p < 0.05). The IV + OR [AVP] demonstrated a strong trend for decreasing over time (p = 0.054) and was significantly less than NF at REHY60 (p = 0.003). Practical application seeking to restore cardiovascular function after EXDE, the combined use of IV + OR rather than a single REHY method seems to be most expedient.

Authors+Show Affiliations

Department of Health, Human Performance, and Recreation, University of Arkansas, Fayetteville, Arkansas, USA. brendonm@uark.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23615479

Citation

McDermott, Brendon P., et al. "The Influence of Rehydration Mode After Exercise Dehydration On Cardiovascular Function." Journal of Strength and Conditioning Research, vol. 27, no. 8, 2013, pp. 2086-95.
McDermott BP, Casa DJ, Lee EC, et al. The influence of rehydration mode after exercise dehydration on cardiovascular function. J Strength Cond Res. 2013;27(8):2086-95.
McDermott, B. P., Casa, D. J., Lee, E. C., Yamamoto, L. M., Beasley, K. N., Emmanuel, H., Pescatello, L. S., Kraemer, W. J., Anderson, J. M., Armstrong, L. E., & Maresh, C. M. (2013). The influence of rehydration mode after exercise dehydration on cardiovascular function. Journal of Strength and Conditioning Research, 27(8), 2086-95. https://doi.org/10.1519/JSC.0b013e318295d548
McDermott BP, et al. The Influence of Rehydration Mode After Exercise Dehydration On Cardiovascular Function. J Strength Cond Res. 2013;27(8):2086-95. PubMed PMID: 23615479.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The influence of rehydration mode after exercise dehydration on cardiovascular function. AU - McDermott,Brendon P, AU - Casa,Douglas J, AU - Lee,Elaine C, AU - Yamamoto,Linda M, AU - Beasley,Kathleen N, AU - Emmanuel,Holly, AU - Pescatello,Linda S, AU - Kraemer,William J, AU - Anderson,Jeffrey M, AU - Armstrong,Lawrence E, AU - Maresh,Carl M, PY - 2013/4/26/entrez PY - 2013/4/26/pubmed PY - 2014/4/17/medline SP - 2086 EP - 95 JF - Journal of strength and conditioning research JO - J Strength Cond Res VL - 27 IS - 8 N2 - Our purpose was to compare the common modes of rehydration (REHY) on cardiovascular and fluid regulation recovery after exercise dehydration (EXDE). Twelve nonheat-acclimatized trained subjects (age: 23 ± 4 years, weight: 81.3 ± 3.7 kg, height: 180 ± 6 cm, V[Combining Dot Above]O2max: 56.9 ± 4.4 ml·min·kg , and body fat: 7.8 ± 3.0%) completed 20-hour fluid restriction and 2-hour EXDE to -4% body mass, and then were rehydrated to -2% body mass in a randomized, crossover design. The REHY methods included no fluid (NF), ad libitum, oral (OR), intravenous (IV), and a combination of IV and OR (IV + OR) of 1/2-normal saline (0.45% NaCl). The REHY occurred for 30 minutes, and the subjects were observed during rest for 30 minutes. Seated, standing, and mean arterial pressure (MAP) and blood pressure (BP) were measured every 15 minutes throughout REHY. Heart rate (HR), plasma arginine vasopressin concentration [AVP], and thirst perception were measured throughout REHY. The EXDE resulted in a body mass loss of 4.32 ± 0.22%. The REHY returned the subjects to -2.13 ± 0.47% body mass for controlled trials. Seated systolic BP was greater for IV + OR compared with that for OR (p = 0.015). Seated systolic BP and MAP during REHY showed that IV + OR was greater than OR, independent of time (p ≤ 0.011). Upon standing, IV + OR demonstrated a greater BP than both NF (p = 0.012) and OR (p = 0.031) did. The HR was reduced by IV and IV + OR to a greater extent than NF at REHY30 and REHY60 (p < 0.05). The IV + OR [AVP] demonstrated a strong trend for decreasing over time (p = 0.054) and was significantly less than NF at REHY60 (p = 0.003). Practical application seeking to restore cardiovascular function after EXDE, the combined use of IV + OR rather than a single REHY method seems to be most expedient. SN - 1533-4287 UR - https://www.unboundmedicine.com/medline/citation/23615479/The_influence_of_rehydration_mode_after_exercise_dehydration_on_cardiovascular_function_ L2 - http://dx.doi.org/10.1519/JSC.0b013e318295d548 DB - PRIME DP - Unbound Medicine ER -