Medicine and Health Sciences Commons^™

Effectiveness Of Short-Term Heat Acclimation On Intermittent Sprint Performance In The Heat With Moderately Trained Males, Andrew T. Garrett, Matt Birkett, Damien O. Gleadall-Siddall, Rachel Burke, James Bray, Fiona Nation

Journal of Human Performance in Extreme Environments

Purpose: Effectiveness of short-term heat acclimation (STHA), over 5-days (permissive dehydration), on intermittent heat stress test (HST) with males. Methods: Ten, moderately-trained, males (mean [SD]; age 25.6 [8.9] y; stature 180.7 [5.6] cm; body mass 83.2 [10.8] kg; and 45.3 [6.5] mL^.kg^-1.min^-1) participated. The HST was 9 x 5min (45-min) of intermittent exercise based on professional soccer players. One week apart, HST1 vs HST (11.0°C; 50%RH), as a reliability trial and HST3 in 31.0°C; 50%RH were completed. Then 90 min dehydration, STHA (no fluid intake), for 5 consecutive days (39.5^oC; 60%RH), using …

Errors Of Measurement For Blood Parameters And Physiological And Performance Measures After The Decay Of Short-Term Heat Acclimation, Andrew T. Garrett, Nancy J. Rehrer, Mark J. Patterson, Andrew J. Simpson, James D. Cotter

Journal of Human Performance in Extreme Environments

Introduction: It is important to determine the accuracy of measurements relative to potential treatment effects, with time intervals between tests. Purpose: The aim of this study was to assess the error of measurement for blood parameters, physiological, and performance measures after the decay of short-term heat acclimation. Methods: Ten trained males (Mean±SD: age 28±7 y; body mass 74.6±4.4 kg; 4.26±0.37 L^.min^-1; peak power output (PPO) 329±42 W) completed an exercising heat stress test (HST) at baseline, 2^nd day after acclimation and then during decay at 1, 2, 3 and 5-6 wks. CoV (95% CI), SE …

Influence Of Core Temperature On Psychomotor Performance During Cold Weather Military Training, Douglas Jones, Rebecca Weller, Stephen Eggan, Nicholas Roberts, Weimin Zheng, Jay Heaney, Timothy Dunn

Journal of Human Performance in Extreme Environments

Purpose: Cold environments may deteriorate psychomotor performance due to slowing of neuronal signals, distractions caused by pain and discomfort, and a loss of manual dexterity. The extent to which core temperature (T_c) influences psychomotor performance in the cold has not been established. Therefore, psychomotor performance and T_c were assessed during a cold weather military training exercise to evaluate this relationship.

Methods: Thirty-six military personnel (age: 26 ± 4 yr, ht: 175 ± 8 cm, wt: 79.1 ± 11.1 kg) participating in cold weather training volunteered for this study. Participants completed a 10-min immersion in cold (1°C) water, …