title: Physiological and perceptual effects of a cooling garment during simulated industrial work in the heat.
abstract: OBJECTIVE
  Evaluate physiological and perceptual responses using a phase change cooling (PCC) garment during simulated work in the heat.
  
  
  METHODS
  Twenty males wearing compression undergarments, coverall suit, gloves, and hard-hat, completed two randomly assigned trials (with PCC inserts or control, CON) of simulated industrial tasks in the heat (34.2 ± 0.05 °C, 54.7 ± 0.3%RH). Trials consisted of two 20 min work bouts, a maximum performance bout, and 10 min of recovery.
  
  
  RESULTS
  Physiological strain index (PSI) was lower during PCC after the second work bout and during recovery (all P < 0.05). PCC reduced heat storage (27.0 ± 7.6 W m-2) compared to CON (42.7 ± 9.9 W m-2, P < 0.001). Perceptual strain index (PeSI) was reduced with PCC compared to CON (P < 0.001), however performance outcomes were not different between trials (P = 0.10).
  
  
  CONCLUSIONS
  PCC during work in the heat attenuated thermal, physiological, and perceptual strain. This PCC garment could increase safety and reduce occupational heat illness risk.
authors.affiliation: Human Performance Laboratory, University of Arkansas, 155 Stadium Dr HPER 321, Fayetteville, AR 72701, USA. Electronic address: clbutts@uark.edu.
authors.forename: Cory L
authors.initials: CL
authors.lastname: Butts
authors.affiliation: Human Performance Laboratory, University of Arkansas, 155 Stadium Dr HPER 321, Fayetteville, AR 72701, USA. Electronic address: crs1036@gmail.com.
authors.forename: Cody R
authors.initials: CR
authors.lastname: Smith
authors.affiliation: Human Performance Laboratory, University of Arkansas, 155 Stadium Dr HPER 321, Fayetteville, AR 72701, USA. Electronic address: msganio@uark.edu.
authors.forename: Matthew S
authors.initials: MS
authors.lastname: Ganio
authors.affiliation: Human Performance Laboratory, University of Arkansas, 155 Stadium Dr HPER 321, Fayetteville, AR 72701, USA. Electronic address: brendonm@uark.edu.
authors.forename: Brendon P
authors.initials: BP
authors.lastname: McDermott
mesh_terms: D000328:Adult; D005080:Exercise Test; D006339:Heart Rate; D018882:Heat Stress Disorders / Q000517:prevention & control*; D006358:Hot Temperature; D006801:Humans; D008297:Male; D009784:Occupational Diseases / Q000517:prevention & control*; D016272:Occupational Health; D005082:Physical Exertion / Q000502:physiology*; D011481:Protective Clothing; D012881:Skin Temperature; D013647:Task Performance and Analysis; D055815:Young Adult
keywords: Exertional hyperthermia; Heat illness prevention; Phase change clothing