Effect of breathing cooled air during cycling on physiology and performance in the heat.

Background: The aim of this study was to determine the physiological, perceptual, and exercise performance responses to breathing cooled air during and following exercise in the heat.

Methods: Twelve trained male cyclists (26±4 y; 180.5±5.

No Change in 24-Hour Hydration Status Following a Moderate Increase in Fluid Consumption.

Purpose: To investigate changes in 24-hour hydration status when increasing fluid intake.

Methods: Thirty-five healthy males (age 23.8 ± 4.

Hydration Status over 24-H Is Not Affected by Ingested Beverage Composition.

Objective: To investigate the 24-h hydration status of healthy, free-living, adult males when given various combinations of different beverage types.

Methods: Thirty-four healthy adult males participated in a randomized, repeated-measures design in which they consumed: water only (treatment A), water+cola (treatment B), water+diet cola (treatment C), or water+cola+diet cola+orange juice (treatment D) over a sedentary 24-h period across four weeks of testing. Volumes of fluid were split evenly between beverages within each treatment, and when accounting for food moisture content and metabolic water production, total fluid intake from all sources was equal to 35 ± 1 ml/kg body mass.

Effect of air-filled vest on exercise-heat strain when wearing ballistic protection.

Objectives: The purpose was to determine if an air-filled vest worn under ballistic protection reduces physiological strain during exercise in the heat either while wearing a tactical military (TM) protective vest or a law enforcement (LE) concealable vest.

Methods: Sixteen men (24.5±3.