Effect of Caffeine Intake on Finger Cold-Induced Vasodilation

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Presentation transcript:

Effect of Caffeine Intake on Finger Cold-Induced Vasodilation Byeong Jo Kim, PhD, Yongsuk Seo, MS, Jung-Hyun Kim, PhD, Dae Taek Lee, PhD Wilderness & Environmental Medicine Volume 24, Issue 4, Pages 328-336 (December 2013) DOI: 10.1016/j.wem.2013.06.007 Copyright © 2013 Wilderness Medical Society Terms and Conditions

Figure 1 Summary of experimental procedure and time line. CIVD, cold-induced vasodilation; V̇O2max, maximum oxygen consumption. Wilderness & Environmental Medicine 2013 24, 328-336DOI: (10.1016/j.wem.2013.06.007) Copyright © 2013 Wilderness Medical Society Terms and Conditions

Figure 2 Temperature and time parameters of cold-induced vasodilation responses. Tf·min, minimum finger temperature; Tf·max, maximum finger temperature; Tf·diff, difference between Tf·min and Tf·max; Δtonset, time from immersion to Tf·min; and Δtpeak, time from Tf·min to Tf·max. Wilderness & Environmental Medicine 2013 24, 328-336DOI: (10.1016/j.wem.2013.06.007) Copyright © 2013 Wilderness Medical Society Terms and Conditions

Figure 3 Summary of temperature parameters in cold-induced vasodilation under rest and submaximal (submax) and maximal (max) exercise conditions for trials with (CAFF) and without (NCAFF) caffeine. (A) Minimum finger temperature, (B) maximum finger temperature, and (C) difference between minimum and maximum finger temperature. * significantly different at P < .05; ** significantly different at P < .01; ≠ significantly different from Rest condition at P < .05. Values are mean and SD (n = 10). Wilderness & Environmental Medicine 2013 24, 328-336DOI: (10.1016/j.wem.2013.06.007) Copyright © 2013 Wilderness Medical Society Terms and Conditions

Figure 4 Summary of time parameters in cold-induced vasodilation and plasma norepinephrine concentration under rest and submaximal (submax) and maximal (max) exercise conditions for trials with (CAFF) and without (NCAFF) caffeine. (A) Onset time, (B) peak time, and (C) plasma norepinephrine concentration.* significantly different at P < .05; ** significantly different at P < 001; ≠ significantly different from Rest condition at P < .05. Values are mean and SD (n = 10). Wilderness & Environmental Medicine 2013 24, 328-336DOI: (10.1016/j.wem.2013.06.007) Copyright © 2013 Wilderness Medical Society Terms and Conditions