Is Performance of Intermittent Intense Exercise Enhanced by Use of a Commercial Palm Cooling Device?
Walker, T. B., Zupan, M. F., McGregor, J. N., Cantwell, A. R., & Norris, T. D. (2009). Is performance of intermittent intense exercise enhanced by use of a commercial palm cooling device?. Journal of strength and conditioning research, 23(9), 2666–2672. https://doi.org/10.1519/JSC.0b013e3181b1f6a7
Introduction: The purpose of this study was to determine if using the CoreControl Rapid Thermal Exchange (RTX), a commercial palm cooling device, during active rest periods of multiple set training is an effective means to increase performance.
Methods: Ten volunteers (5 men, 5 women) completed a o2max test on a motorized treadmill and 3 interval running tests on a human powered treadmill. This treadmill allowed the subjects to quickly reach their running speed while allowing for measurement of distance, speed, and force. During the interval running tests the subjects completed eight 30-second intervals at a hard/fast pace followed by a 90-second walking or light jogging recovery period. During the recovery period, the subjects placed their left hand on 1 of 3 media: the RTX held at 15°C (R), a 15°C standard refrigerant gel pack (P), or nothing at all (C).
Results: Although there were differences in core temperature (Tc), subjective heat stress ratings, distance, and power generated between intervals, there were no significant differences (p < 0.05) found between treatments for any of these variables, nor was the interaction effect of interval*treatment found to be significant. Mean distance completed per trial was 717.1 m ± 124.4 m (R), 724.8 m ± 130.3 m (P), and 728.6 m ± 110.6 m (C). Change in Tc from baseline to end-test averaged 1.41°C ± 0.37°C (R), 1.41°C ± 0.39°C (P), and 1.41°C ± 0.59°C (C). There were no significant differences (p < 0.05) in Tc, heart rate (HR), or o2 between intervals or treatments.
Conclusions: We conclude that the RTX, in its current iteration, is ineffective at improving performance and/or mitigating thermal stress during high-intensity intermittent exercise.
Keywords: thermal stress; running performance; mechanical cooling
In Simple Terms:
This study tested whether using a palm cooling device during rest between sprints could help people run farther or feel less heat. Cooling with the device or a cold gel pack made no difference compared to no cooling. All groups had the same body temperature, heart rate, and performance. The palm cooling device did not improve sprint performance or reduce heat stress.
Uploaded by Braeden Ostepchuk, creator of the CEU-approved course 0th Law of Physiology, co-founder of Kuhler Technologies, and inventor of Kühler.