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 language | English |
|---|---|
| Pages (from-to) | 936-940 |
| Number of pages | 5 |
| Journal | Journal of Science and Medicine in Sport |
| Volume | 19 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2016 Nov 1 |
| Externally published | Yes |
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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
Cite this
Reduction in body temperature using hand cooling versus passive rest after exercise in the heat. / Adams, William M.; Hosokawa, Yuri; Adams, Elizabeth L.; Belval, Luke N.; Huggins, Robert A.; Casa, Douglas J.
In: Journal of Science and Medicine in Sport, Vol. 19, No. 11, 01.11.2016, p. 936-940.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Reduction in body temperature using hand cooling versus passive rest after exercise in the heat
AU - Adams, William M.
AU - Hosokawa, Yuri
AU - Adams, Elizabeth L.
AU - Belval, Luke N.
AU - Huggins, Robert A.
AU - Casa, Douglas J.
PY - 2016/11/1
Y1 - 2016/11/1
N2 - 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.
AB - 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.
KW - Exercise recovery
KW - Exertional heat illness
KW - Hydration
KW - Rectal temperature
KW - Thermal sensation
UR - http://www.scopus.com/inward/record.url?scp=84961279216&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84961279216&partnerID=8YFLogxK
U2 - 10.1016/j.jsams.2016.02.006
DO - 10.1016/j.jsams.2016.02.006
M3 - Article
VL - 19
SP - 936
EP - 940
JO - Journal of Science and Medicine in Sport
JF - Journal of Science and Medicine in Sport
SN - 1440-2440
IS - 11
ER -