Tags

Type your tag names separated by a space and hit enter

Effect of varying initial drink volume on rehydration of horses.
Physiol Behav. 2003 Jul; 79(2):135-42.PB

Abstract

Body mass (BM), water intake (WI), and plasma osmolality (P(osm)) and electrolyte concentrations were measured in six 2-year-old Arabian horses provided either 4 l, 8 l, or an unlimited amount of water (UW) for drinking during the initial 5 min of recovery from 45-km of treadmill exercise. After weighing, horses were placed in a stall and further WI between 20 and 60 min of recovery was measured. During exercise, horses lost 3.3+/-0.3%, 3.2+/-0.1%, and 3.3+/-0.2% (P>.05) of BM and P(osm) increased by 7.2+/-0.5, 7.9+/-0.8, and 7.7+/-0.5 mOsm/kg (P>.05) for 4 l, 8 l, and UW, respectively. WI during the first 5 min of recovery was 4.0+/-0.0, 8.0+/-0.0, and 9.0+/-1.3 l and was accompanied by 2.4+/-0.4, 5.8+/-0.9, and 6.1+/-0.7 mOsm/kg decreases (P<.05) in P(osm) for 4 l, 8 l, and UW, respectively. Between 20 and 60 min of recovery, WI was 6.2+/-1.5, 1.2+/-0.6, and 1.0+/-0.7 l (P<.05) for 4 l, 8 l, and UW, respectively. Thus, total WI was 10.2+/-1.5, 9.2+/-0.6, and 10.0+/-1.1 l (P>.05) for 4 l, 8 l, and UW, respectively. After 60 min of recovery, persisting BM loss was 1.3+/-0.5%, 1.1+/-0.2%, and 1.0+/-0.2% (P>.05) for 4 l, 8 l, and UW, respectively and P(osm) had returned to pre-exercise values for all treatments. In conclusion, limiting the volume of water initially provided to horses dehydrated by endurance exercise had no significant effect on total WI during the initial 60 min of recovery; however, persisting BM loss was observed with all treatments. Further, following exercise-induced dehydration, the primary stimulus of thirst was an increase in plasma tonicity rather than hypovolemia.

Authors+Show Affiliations

Department of Large Animal Clinical Sciences, D-202 Veterinary Medical Center, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824-1314, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

12834783

Citation

Butudom, Prawit, et al. "Effect of Varying Initial Drink Volume On Rehydration of Horses." Physiology & Behavior, vol. 79, no. 2, 2003, pp. 135-42.
Butudom P, Axiak SM, Nielsen BD, et al. Effect of varying initial drink volume on rehydration of horses. Physiol Behav. 2003;79(2):135-42.
Butudom, P., Axiak, S. M., Nielsen, B. D., Eberhart, S. W., & Schott, H. C. (2003). Effect of varying initial drink volume on rehydration of horses. Physiology & Behavior, 79(2), 135-42.
Butudom P, et al. Effect of Varying Initial Drink Volume On Rehydration of Horses. Physiol Behav. 2003;79(2):135-42. PubMed PMID: 12834783.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of varying initial drink volume on rehydration of horses. AU - Butudom,Prawit, AU - Axiak,Shannon M, AU - Nielsen,Brian D, AU - Eberhart,Susan W, AU - Schott,Harold C,Jr PY - 2003/7/2/pubmed PY - 2003/10/30/medline PY - 2003/7/2/entrez SP - 135 EP - 42 JF - Physiology & behavior JO - Physiol Behav VL - 79 IS - 2 N2 - Body mass (BM), water intake (WI), and plasma osmolality (P(osm)) and electrolyte concentrations were measured in six 2-year-old Arabian horses provided either 4 l, 8 l, or an unlimited amount of water (UW) for drinking during the initial 5 min of recovery from 45-km of treadmill exercise. After weighing, horses were placed in a stall and further WI between 20 and 60 min of recovery was measured. During exercise, horses lost 3.3+/-0.3%, 3.2+/-0.1%, and 3.3+/-0.2% (P>.05) of BM and P(osm) increased by 7.2+/-0.5, 7.9+/-0.8, and 7.7+/-0.5 mOsm/kg (P>.05) for 4 l, 8 l, and UW, respectively. WI during the first 5 min of recovery was 4.0+/-0.0, 8.0+/-0.0, and 9.0+/-1.3 l and was accompanied by 2.4+/-0.4, 5.8+/-0.9, and 6.1+/-0.7 mOsm/kg decreases (P<.05) in P(osm) for 4 l, 8 l, and UW, respectively. Between 20 and 60 min of recovery, WI was 6.2+/-1.5, 1.2+/-0.6, and 1.0+/-0.7 l (P<.05) for 4 l, 8 l, and UW, respectively. Thus, total WI was 10.2+/-1.5, 9.2+/-0.6, and 10.0+/-1.1 l (P>.05) for 4 l, 8 l, and UW, respectively. After 60 min of recovery, persisting BM loss was 1.3+/-0.5%, 1.1+/-0.2%, and 1.0+/-0.2% (P>.05) for 4 l, 8 l, and UW, respectively and P(osm) had returned to pre-exercise values for all treatments. In conclusion, limiting the volume of water initially provided to horses dehydrated by endurance exercise had no significant effect on total WI during the initial 60 min of recovery; however, persisting BM loss was observed with all treatments. Further, following exercise-induced dehydration, the primary stimulus of thirst was an increase in plasma tonicity rather than hypovolemia. SN - 0031-9384 UR - https://www.unboundmedicine.com/medline/citation/12834783/Effect_of_varying_initial_drink_volume_on_rehydration_of_horses_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0031938403000854 DB - PRIME DP - Unbound Medicine ER -