THE EFFECT OF PERSONALIZED FLUID REPLACEMENT ON PHYSIOLOGICAL RECOVERY AFTER HALF-MARATHON RUNNING
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Abstract
Long-distance running generates heat accumulation and physiological stress, especially in cardiovascular and thermoregulatory systems. Proper fluid and electrolyte replacements have been reported to prevent adverse effects during exercise. Nevertheless, whether the benefit of personalized fluid replacement continues to the recovery period after half-marathon running remains unclear. Therefore, this study aimed to compare the effect of fluid replacement protocols on physiological recovery after half-marathon running. Eight healthy male runners (age 34.50 ± 4.8 yr., BMI 23.60 ± 1.8 kg/m2, body fat 18.82 ± 4.6%) performed two sessions of 21.1 km running with self-paced speed. The subjects received either Personalized drinking (PD; 70% of water and 100% of sodium loss matching individual sweat) or Ad libitum (AD; drinking water as much as desired) in a random order. Body weight, sodium loss, and plasma osmolality were measured before and after running, while heart rate (HR) and mean body temperature were monitored at 0-minute, 5-minute and 10-minute time points after completion of running. The running pace and volume of fluid replacement between AD and PD trials were not significantly different. The percentage of water intake, when compared to bodyweight loss, was significantly higher in the PD than AD trials (76.6% vs. 39.4%). Consequently, bodyweight loss in the AD trial was 80% higher than the PD trial. At 0-minute, HR of the subjects in the PD trial was lower than AD (p < 0.05). In addition, mean body temperature at 5-minute and 10-minute after finishing half marathon in the PD trial was lower than that of the AD trial (p < 0.05). These findings suggested that personalized fluid replacement during half-marathon running would be beneficial to physiological recovery, possibly due to maintaining thermoregulation and plasma volume.
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The published article is a copyright of the Academic Journal of Thailand National Sports University. The passage appeared in each article in this academic journal is a perspective of each author which is not related to the journal. Each author is required to be responsible for all components of his/her own article. If there are any mistakes, each author must be responsible for those mistakes on his/her own.
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