Related Experiment Video
Updated: Jun 15, 2026

Non-invasive Assessments of Subjective and Objective Recovery Characteristics Following an Exhaustive Jump Protocol
Published on: June 8, 2017
Postexercise cooling rates in 2 cooling jackets
Carly Brade1, Brian Dawson, Karen Wallman
1School of Sport Science, Exercise and Health, The University of Western Australia, Crawley, Western Australia.
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 o(2)max workload in a hot climate chamber (temperature = 35.0 +/- 1.4 degrees 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 degrees 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 m(2), V o(2)max = 49.0 +/- 7.0 mLxkg(-1)xmin(-1)) participated.
Intervention(S):
Three experimental conditions, consisting of a PC17 jacket, a gel jacket, and no jacket.
Main Outcome Measure(S):
Core temperature (T(C)), mean skin temperature (T(Sk)), and T(C) cooling rate ( degrees C/min).
Results:
Mean peak T(C) postexercise was 38.49 +/- 0.42 degrees C, 38.57 +/- 0.41 degrees C, and 38.55 +/- 0.40 degrees C for the PC17 jacket, gel jacket, and control conditions, respectively. No differences were observed in peak T(C) cooling rates among the PC17 jacket (0.038 +/- 0.007 degrees C/min), gel jacket (0.040 +/- 0.009 degrees C/min), and control (0.034 +/- 0.010 degrees C/min, P > .05) conditions. Between trials, no differences were calculated for mean T(Sk) cooling.
Conclusions:
Similar cooling rates for all 3 conditions indicate that there is no benefit associated with wearing the PC17 or gel jacket.
Related Concept Videos
Methods of reducing fever
Pharmacological Methods of Reducing Fever:
Responses to Heat and Cold Stress
Decreased Body Temperature
Mechanisms of Heat Transfer II
Thermoregulation
Masonry in Cold and Hot Weather Conditions
Other key practices include keeping masonry units and sand dry and...

