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- W2080498092 abstract "Manual dexterity decreases in cold ambients and exercise has been shown to improve performance by augmenting finger temperature. PURPOSE: We evaluated how isoenergetic bouts of interval (INT) and continuous (CONT) exercise alter body temperatures, Purdue Pegboard performance, and central blood volume in the cold. METHODS: Fourteen young men underwent two three-hour trials in 5 ± 1 °C air, separated by one week. All trials included a 90-minute period of acute cold exposure (ACE), 30 minutes of exercise (INT or CONT) and a 60-minute recovery period (REC). Participants donned approximately 1 clo but the hands remained bare for the duration of testing so that a steep decline in dexterity performance occurred prior to the initiation of exercise. INT and CONT were both conducted at 50 ± 1% of each individual's VO2 max. Core and skin temperatures were monitored continuously and the dominant hand and bimanual pegboards were conducted at ten time points throughout each 3-hour trial. In addition, oxygen consumption and torso hemodynamics were assessed via indirect calorimetry and impedance cardiography, respectively. RESULTS: As expected, finger temperature declined rapidly during ACE and caused a 32% reduction in dexterity performance, relative to thermoneutral conditions. Both modes of exercise increased finger temperature and manual performance, relative to ACE. However, CONT was significantly more effective than INT at increasing finger temperature, which resulted in significantly better dexterity scores during REC. Core temperature was not different between trials. However, a significant increase in stroke index was found following CONT. CONCLUSIONS: It is suggested that a greater volume of warm blood in the torso facilitates finger rewarming (and thus dexterity performance) in the cold. The cascade of events from exercise mode to finger dexterity performance seems to be mediated in large part by the cardiovascular system." @default.
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- W2080498092 date "2010-05-01" @default.
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- W2080498092 title "Hemodynamics And Finger Rewarming Alter Dexterity Following Interval Vs. Continuous Exercise In The Cold" @default.
- W2080498092 doi "https://doi.org/10.1249/01.mss.0000385780.38874.21" @default.
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