Hypohydration during Field Training in Hot Weather. Carbohydrate-Electrolyte Solutions during Field Training: Incidence of Hypohydration.

摘要

Two carbohydrate-electrolyte solutions (CE1, CE2) were evaluated for their ability to reduce the incidence of hypohydration in reservists participating in a field training exercise in hot weather (max T(amb)=88-100 F). Hydration status was monitored twice daily in sixty-one male and female soldiers who consumed one of four beverages (77 + or - 2 F) ad libitum: CE1, CE2, water (W), or flavored water (FW) placebo. Group W had the highest total percent incidence of urine specific gravity (USG) > or = 1.030 (22%) whereas CE2 and FW placebo groups had the lowest (6% and 8%, respectively). Increased heat stress elevated both the group means for USG and the incidence of USG > or = 1.030 despite enhanced fluid intake. CE2 and FW placebo were rated more favorably than CE1 and W, and this preference was reflected in the greater total fluid intakes in the CE2 and FW placebo groups. CE2 and FW placebo were effective in reducing the incidence of hypohydration during this field exercise. Keywords: Hypohydration; Fluid intake; Urine specific gravity; Beverages; Dehydration. (kt)