Postexercise Cooling Rates in 2 Cooling Jackets
| Autor: | Karen E. Wallman, Ted Polglaze, Brian Dawson, Carly Brade |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Male
Engineering Hot Temperature Sweating Physical Therapy Sports Therapy and Rehabilitation Context (language use) Common method Core temperature Clothing Young Adult Oxygen Consumption Forensic engineering Humans Orthopedics and Sports Medicine Process engineering Exercise Original Research Analysis of Variance business.industry Skin temperature General Medicine Cooling rates Cold Temperature Skin Temperature business Gels Body Temperature Regulation |
| Zdroj: | Journal of Athletic Training. 45:164-169 |
| ISSN: | 1062-6050 |
| DOI: | 10.4085/1062-6050-45.2.164 |
| Popis: | Context:Cooling jackets are a common method for removing stored heat accumulated during exercise. To date, the efficiency and practicality of different types of cooling jackets have received minimal investigation.Objective:To examine whether a cooling jacket containing a phase-change material (PC17) results in more rapid postexercise cooling than a gel cooling jacket and a no-jacket (control) condition.Design:Randomized, counterbalanced design with 3 experimental conditions.Setting:Participants exercised at 75% V˙o2max workload in a hot climate chamber (temperature = 35.0 ± 1.4°C, relative humidity = 52 ± 4%) for 30 minutes, followed by postexercise cooling for 30 minutes in cool laboratory conditions (ambient temperature = 24.9 ± 1.8°C, relative humidity = 39% ± 10%).Patients or Other Participants:Twelve physically active men (age = 21.3 ± 1.1 years, height = 182.7 ± 7.1 cm, body mass = 76.2 ± 9.5 kg, sum of 6 skinfolds = 50.5 ± 6.9 mm, body surface area = 1.98 ± 0.14 m2, V˙o2max = 49.0 ± 7.0 mL·kg−1·min−1) participated.Intervention(s):Three experimental conditions, consisting of a PC17 jacket, a gel jacket, and no jacket.Main Outcome Measure(s):Core temperature (TC), mean skin temperature (TSk), and TC cooling rate (°C/min).Results:Mean peak TC postexercise was 38.49 ± 0.42°C, 38.57 ± 0.41°C, and 38.55 ± 0.40°C for the PC17 jacket, gel jacket, and control conditions, respectively. No differences were observed in peak TC cooling rates among the PC17 jacket (0.038 ± 0.007°C/min), gel jacket (0.040 ± 0.009°C/min), and control (0.034 ± 0.010°C/min, P > .05) conditions. Between trials, no differences were calculated for mean TSk cooling.Conclusions:Similar cooling rates for all 3 conditions indicate that there is no benefit associated with wearing the PC17 or gel jacket. |
| Databáze: | OpenAIRE |
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