Addition of In-Play Cooling Breaks During Intermittent Exercise While Wearing Lacrosse Uniforms in The Heat Attenuates Increases in Rectal Temperature.

To reduce the risk of heat-related illness, appropriate body cooling strategies are needed during men's lacrosse competitions in hot-humid environments. The current study investigated whether additional in-play cooling breaks would attenuate the core (rectal) body temperature rise during exercise designed to mimic the activity patterns of a men's lacrosse match while wearing uniform in hot-humid environments. In randomized and counterbalanced order, ten physically active men completed two experimental trials comprising four quarters of 15-min intermittent cycling exercises separated by a 10-min simulated half-time break and two 2-min quarter breaks in a climate chamber (35°C, 50% relative humidity).