Effects of Hydration on Fluid Balance and Lower-Extremity Blood Viscosity During Long Airplane Flights

Effects of simulated domestic and international air travel on sleep, performance, and recovery for team sports

“…In addition, mid‐calf girth was significantly increased immediately after the simulated INT travel. This suggests acute muscle swelling may have occurred, which is similar to the observations of previous studies (Hamada et al., ; Cesarone et al., ). Other limitations to acknowledge include the small sample size, and inability to simulate the mild hypobaric pressure and reduced air quality experienced on a commercial flight (Muhm et al., ), which may increase hypohydration and muscle swelling.…”

“…However, one of the major limitations of the present study was that the humidity during simulated travel was 61%. This is significantly greater than the 13% recorded during actual international air travel, which has been reported to have a detrimental impact on hydration (Hamada et al., ). In addition, mid‐calf girth was significantly increased immediately after the simulated INT travel.…”

Physiological testing of a beverage system designed for long-haul air travel

“…Fluid balance and plasma volume were maintained more effectively with Flyhidrate than with a matched volume of placebo beverage, despite the consumption of other fluids. These findings concur with those from a field trial of another sodium-based beverage in long-haul flying [ 2 ]. Other potential physiological effects from supplemental ingredients were not discernible in these laboratory trials.…”

Electrolyte-carbohydrate beverage prevents water loss in the early stage of high altitude training

“…Its favorable effects might be obtained by the mixture of electrolytes and carbohydrates. A similar result was observed during long flights when subjects were given either a solution of sodium (21.0 mEq/L) and 6.7% carbohydrate or water alone (20). In this study, although water intake was similar when either the electrolytecarbohydrate beverage or water was given, urine volume was lower and water retention was higher in the former group than in the latter group.…”