Year: 2004
Type: article
Study design: Clinical Trial
Abstract: This cross over study assessed the effectiveness of plain water (PW), sports drink \n(SD), young coconut water (CW) and sodium enriched young coconut water (SCW) \non whole body rehydration (R), plasma volume (PV) restoration after exerciseinduced \ndehydration. Ten healthy male subjects (age range, 19 - 27 years) were \nexercised at 65% of V02max at an environmental temperature. of 32.06±0.02oe \nwhich a relative humidity (RH) of 53.32±0.17% for 90 minutes until 3.08± 0.04% \n(1.83±0.1 0 kg) of their body weight was loss. After which, the subjects moved to \nthe thermoneutral environment (23.2±0.3°C) and rested for 30 minutes prior to \nbegin the 2-hour R period. During R. Subjects drank either PW, SD, ew or sew \nin randomized representing 120% of the fluid lost in three boluses representation \n50% (915±54 ml), 40% (732± 37m I) and 30% (556±35 ml) of the fluid lost at 0, 30, \n60-min respectively. In all the trials subject were somewhat hypohydrated (range \n0.32- 0.52 kg) body weight (BW) below euhydrated BW after the 2-h R period. \nThe percent body weight loss that was regained (used as index of percent \nrehydration) during PW, SD, CW and sew was 58±2o/o, 68±2%, 65±2% and \n69±1% respectively with a significant better rehydration with SD and SeW than PW \n(p<0.05). The rehydration index (RI) for SD and SeW was significantly lower than \nPW (p<0.01 ). PV was restored similarly to euhydration levels after 2-h of \nre_hydration with SD, CW and sew but was significantly lower (p<0.05) with PW \ntrials. Cumulative urine output was significantly higher for PW when compare to \nSD and sew (p<0.05). Serum er were significantly higher with ew and sew \ntrials (p<0.05). Serum Na+, serum K+, serum er and serum and urine osmolality of \npW trial were significantly lower (p<O.OS) than SD, CW and SCW at the end of 2-hR period. Plasma glucose concentration were significantly higher when SO, ew· \nand SeW were ingested during rehydration compared to PW (p<0.01 ). SCW were \nsimilar in sweetness with CW and SO but caused less nausea and stomach upset \nwhen compares either SD or PW, furthermore sew was easier to consume in \nlarge volume. In conclusion~ ingesting SCW was as good as ingesting a \ncommercial sports drink for whole body rehydration after .exercise-induced \ndehydration but with better fluid tolerance.
Authors: Singh, Rabindarjeet, Sirisinghe, Roland G., Ismail, Ishak, Nawawi, Mohammad
Institution: Universiti Sains Malaysia
Language: English
Subfield: Physiology (medical)
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W7014799502