Reduction in body temperature using hand cooling versus passive rest after exercise in the heat

William M. Adams, Yuri Hosokawa, Elizabeth L. Adams, Luke N. Belval, Robert A. Huggins, Douglas J. Casa

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Objectives To examine the effects of hydration and hand cooling on lowering body temperature after exercise in the heat. Design Randomized cross-over design. Methods Nine recreationally active male participants (mean ± SD; age, 24 ± 4; height, 177.3 ± 9.9 cm; body mass, 76.7 ± 11.6 kg; body fat, 14.7 ± 5.8%) completed a bout of treadmill exercise in a hot environment. After completion of exercise, participants were assigned to the following trials for post-exercise cooling: (1) hydrated with passive rest (HY), (2) hydrated with hand cooling on both hands (HY + 2HC), (3) dehydrated with passive rest (DY), and (4) dehydrated with hand cooling on both hands (DY + 2HC). Within subject differences were assessed using a three-way (Hydration × Condition × Time) repeated measures ANOVA with Tukey's post hoc analysis if significant interactions were found. Results Irrespective of hydration status, hand cooling on both hands resulted in significantly greater reductions in T REC than passive cooling at minute 20 (0.27°C [0.05, 0.49], ES = 2.08, p = 0.017) (Fig. 1). The reduction in T REC at minute 18 trended towards statistical significance (0.21°C [.003, .42], ES = 1.59, p = 0.053). Hydration status alone and when differentiated among modes of cooling showed no differences on changes of T REC or heart rate across all conditions during post exercise recovery (p > 0.05). Conclusions Hand cooling on both hands reduced T REC more than passive cooling, however, the cooling rates observed render hand cooling a poor option for cooling. Greater reductions in T REC after exercise or between bouts of exercise may enhance recovery and subsequent performance.

Original languageEnglish
Pages (from-to)936-940
Number of pages5
JournalJournal of Science and Medicine in Sport
Volume19
Issue number11
DOIs
Publication statusPublished - 2016 Nov 1
Externally publishedYes

Keywords

  • Exercise recovery
  • Exertional heat illness
  • Hydration
  • Rectal temperature
  • Thermal sensation

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

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