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Palm cooling (often referred to as palmar cooling) is a type of recovery intervention that involves cooling the palm of the hand[1] during rest periods between bouts of strenuous physical activity. The palm cooling modality can be used to moderate increases in core temperature[1][2] resulting from the level of physical activity, the wearing of protective clothing or a combination of both, for example in the activities of military personnel or firefighters.
Sporting activities, for example during timeouts of basketball or at half time in a game of football, where recovery time is limited, is another example where the level of physical activity combined with or without high ambient temperature can lead to raised core temperature. In these circumstances palm cooling can be used as it is important that the cooling intervention does not chill major muscle groups, which need to be kept warm to optimize performance[3][4] when the physical activity is resumed.
There is some evidence of palm cooling during rest periods delaying the onset of fatigue,[5] which is a major precursor of injury[6] and an inhibitor of performance. Palm cooling is also used for strength & conditioning,[5][7][8] for example between sets in a weight training programme or where obese subjects are taking part in a weight loss[9] exercise programme.
^ abGrahn, Dennis A.; Cao, Vinh H.; Heller, H. Craig (2005). "Heat extraction through the palm of one hand improves aerobic exercise endurance in a hot environment". Journal of Applied Physiology. 99 (3): 972–978. doi:10.1152/japplphysiol.00093.2005. ISSN 8750-7587. PMID 15879169. S2CID 6077247.
^Cite error: The named reference :9 was invoked but never defined (see the help page).
^Sargeant, Anthony J. (1987). "Effect of muscle temperature on leg extension force and short-term power output in humans". European Journal of Applied Physiology and Occupational Physiology. 56 (6): 693–698. doi:10.1007/BF00424812. ISSN 1439-6327. PMID 3678224. S2CID 13137209.
^Sleivert, G.G. (2001). "The influence of whole-body vs. torso pre-cooling on physiological strain and performance of high-intensity exercise in the heat". Comparative Biochemistry and Physiology. 128 (4): 657–666. doi:10.1016/S1095-6433(01)00272-0. PMID 11282310 – via doi:10. 1016/S1095-6433(01)00272-0.
^ abKwon, Young Sub; Robergs, Robert A.; Kravitz, Len R.; Gurney, Burke A.; Mermier, Christine M.; Schneider, Suzanne M. (2010). "Palm Cooling Delays Fatigue during High-Intensity Bench Press Exercise". Medicine & Science in Sports & Exercise. 42 (8): 1557–1565. doi:10.1249/MSS.0b013e3181d34a53. ISSN 0195-9131. PMID 20139781. S2CID 7024719.
^Nedelec, Mathieu; McCall, Alan; Carling, Chris; Legall, Franck; Berthoin, Serge; Dupont, Gregory (2012). "Recovery in Soccer Part I–Post-Match Fatigue and Time Course of Recovery". Sports Medicine. 42 (12): 997-1015 0112-1642/12/0012-0997 – via Springer.
^Cite error: The named reference :4 was invoked but never defined (see the help page).
^Cite error: The named reference :5 was invoked but never defined (see the help page).
^Sims, Stacy T (2012). "Innovation in Exercise: Increasing Capacity of Sedentary Obese Women with Cooling;". Circulation. 125 (10 Supplement). doi:10.1161/circ.125.suppl_10.AMP016.
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