Hybrid cooling vest for cooling between exercise bouts in the heat: Effects and practical considerations |
| |
| Institution: | 1. Department of Building and Real Estate, The Hong Kong Polytechnic University, China;2. Soochow University, China;3. Shandong Sport University, China;1. Laboratory for Clothing Physiology and Ergonomics (LCPE), The National Engineering Laboratory for Modern Silk, Soochow University, Suzhou 215123, China;2. Department of Fashion Design and Engineering, College of Textile and Clothing Engineering, Soochow University, Suzhou 215021, China;3. Thermal Environment Laboratory, Department of Design Science, Lund University, 22100 Lund, Sweden;4. Department of AESHM, Iowa State University, Ames IA 50011, USA;1. Department of Building and Real Estate, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;2. Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;1. Mechanical Engineering Department, American University of Beirut, P.O. Box 11-0236, Beirut 1107-2020, Lebanon;2. Department of Architecture and Urban Planning, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar;3. Mechanical Engineering Department, College of Engineering & Petroleum, Kuwait University, Khaldiya, P.O. Box 5969, Safat, 13060, Kuwait;1. Department of Building and Real Estate, The Hong Kong Polytechnic University, 11 Yuk Choi Road, Hung Hom, Hong Kong |
| |
| Abstract: | While continuous cooling strategies may induce some ergonomic problems to occupational workers, cooling between work bouts may be an alternative for cooling them down in hot environments. The purpose of this study was to assess the effects of wearing a newly designed hybrid cooling vest (HCV) between two bouts of exercise. Inside a climatic chamber set at an air temperature of 37 °C and a relative humidity of 60%, twelve male participants underwent two bouts of intermittent exercise interspersed with a 30 min between-bout recovery session, during which HCV or a passive rest without any cooling (PAS) was administered. The results indicated that thermoregulatory, physiological, and perceptual strains were significantly lower in HCV than those in PAS during the recovery session (p≤0.022), which were accompanied with a large effect of cooling (Cohen's d=0.84–2.11). For the second exercise bout, the exercise time following HCV (22.13±12.27 min) was significantly longer than that following PAS (11.04±3.40 min, p=0.005, d=1.23) During this period, core temperature Tc was significantly lower by 0.14±0.0.15 °C in HCV than that in PAS. The heart rate drift over time was declined by 2±2 bpm min?1 (p=0.001, d=1.00) and the rise in physiological strain index was reduced by 0.11±0.12 unit min?1 (p=0.010, d=0.96) following the use of HCV. These findings suggested that using HCV could accelerate between-bout recovery and improve subsequent exercise performance by the enlarged body core temperature margin and blunted cardiovascular drift. |
| |
| Keywords: | Intermittent cooling Temperature margin Heart rate drift Temperature gradient |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
