RT Journal Article
SR Electronic
T1 EFFECT OF ORAL REHYDRATION SOLUTION ON HYDRATION STATE DURING ‘SUMO’ TRAINING
JF British Journal of Sports Medicine
JO Br J Sports Med
FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine
SP 639
OP 639
DO 10.1136/bjsports-2014-093494.214
VO 48
IS 7
A1 K Minami
A1 T Ishikawa
A1 J Ishida
A1 Y Nakagawa
YR 2014
UL http://bjsm.bmj.com/content/48/7/639.2.abstract
AB Background Exercise in a hot environment can cause loss of water and electrolytes, which conveys tress on homeostasis. Objective To maintain appropriate hydration status in such situation, it expects to be suitable for fluid replacement to drink oral rehydration solutions (ORS) which have higher sodium concentration and higher absorptive of water in the intestine than general purpose sports drinks (SPD). Design Randomized crossover study. Setting University SUMO League. Participants 10 members of a university SUMO club voluntarily participated after providing written informed consent. Interventions Participants ingested SPD or ORS with an equalized exercise load in a randomized crossover manner at a wet bulb globe temperature of 27–30°C. Main outcome measurements Body weight, water distribution with bioelectrical impedance analysis, vital signs, blood analysis and visual analogue scale (VAS) for fatigue and thirst were evaluated between the two drinks. Values are expressed as mean±SD (SPD vs. ORS). Results Differences were observed 15 min after training in the changes from the baseline of serum total protein (0.6±0.3 vs. 0.3±0.2 g/dL, P=.02), serum sodium (–1.4±2.1 vs. 0.2±2.0 mEq/L, P<.01), and VAS scores of fatigue (80±13 vs. 64±24, P=.03) and thirst (49±21 vs. 31±15, P=.03). Differences 75 min after training were also observed in the changes of extracellular fluid (0.3±0.2 vs. 0.5±0.2 L, P=.02), serum osmolarity (–2.7±4.0 vs. 0.4±3.5 mOsm, P=.03). Conclusions The ORS rather than the SPD were shown to be more suitable to maintain hydration status in a hot environment of SUMO training. The intake of ORS should be considered upon exercise accompanied with marked perspiration.