The effect of exercise-induced elevation in core temperature on cold-induced vasodilatation response in toes

Dobnikar, Uroš; Kounalakis, Stylianos N.; Mekjavic, Igor B.

doi:10.1007/s00421-009-1035-4

Cited by 24 publications

(21 citation statements)

References 18 publications

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“…A minimal presence of a CIVD response observed in the BR-1 tests is in agreement with previously reported findings (Cheung and Mekjavic 2007;Dobnikar et al 2009). It is noteworthy that despite a weak CIVD response of the toes already at the onset of the bed rest, after 35 days bed rest the cold-induced vasoconstriction was greater.…”

Section: Discussionsupporting

confidence: 92%

Prolonged physical inactivity leads to a drop in toe skin temperature during local cold stress

Keramidas

Kölegård

Eiken

et al. 2014

Appl. Physiol. Nutr. Metab.

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The purpose was to examine the effects of a prolonged period of recumbency on the toe temperature responses during cold-water foot immersion. Ten healthy males underwent 35 days of horizontal bed rest. The right foot of the subjects was assigned as the experimental (EXP) foot. To prevent bed rest-induced vascular deconditioning in the left control foot (CON), a sub-atmospheric vascular pressure countermeasure regimen was applied on the left lower leg for 4 × 10 min every second day. On the first (BR-1) and the last (BR-35) day of the bed rest, subjects performed two 30 min foot immersion tests in 8 °C water, one with the EXP foot and the other with the CON foot. The tests were conducted in counter-balanced order and separated by at least a 15 min interval. At BR-35, the average skin temperature of the EXP foot was lower than at BR-1 (-0.8 °C; P = 0.05), a drop that was especially pronounced in the big toe (-1.6 °C; P = 0.05). In the CON foot, the average skin temperature decreased by 0.6 °C in BR-35, albeit the reduction was not statistically significant (P = 0.16). Moreover, the pressure countermeasure regimen ameliorated immersion-induced thermal discomfort for the CON foot (P = 0.05). Present findings suggest that severe physical inactivity exaggerates the drop in toe skin temperature during local cold stress, and thus might constitute a potential risk factor for local cold injury.

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Section: Discussionsupporting

confidence: 92%

Prolonged physical inactivity leads to a drop in toe skin temperature during local cold stress

Keramidas

Kölegård

Eiken

et al. 2014

Appl. Physiol. Nutr. Metab.

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“…It has been previously demonstrated that the thermal status of the subjects affects the nature of the CIVD response (Daanen and Ducharme 1999;Dobnikar et al 2009;Flouris et al 2008). In our study, we defined the thermal status of the participants from the measurement of T ear canal , which is an index of core temperature, and the T avg prior to the immersion in warm water.…”

Section: Discussionmentioning

confidence: 99%

Enhancement of the finger cold-induced vasodilation response with exercise training

et al. 2010

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Cold-induced vasodilatation (CIVD) is a cyclical increase in finger temperature that has been suggested to provide cryoprotective function during cold exposures. Physical fitness has been suggested as a potential factor that could affect CIVD response, possibly via central (increased cardiac output, decreased sympathetic nerve activity) and/or peripheral (increased microcirculation) cardiovascular and neural adaptations to exercise training. Therefore, the purpose of this study was to investigate the effect of endurance exercise training on the CIVD response. Eighteen healthy males trained 1 h d(-1) on a cycle ergometer at 50% of peak power output, 5 days week(-1) for 4-weeks. Pre, Mid, Post, and 10 days after the cessation of training and on separate days, subjects performed an incremental exercise test to exhaustion (.VO(2peak)) and a 30-min hand immersion in 8 degrees C water to examine their CIVD response. The exercise-training regimen significantly increased .VO(2peak) (Pre: 46.0 +/- 5.9, Mid: 52.5 +/- 5.7, Post: 52.1 +/- 6.2, After: 52.6 +/- 7.6 ml kg(-1) min(-1); P < 0.001). There was a significant increase in average finger skin temperature (Pre: 11.9 +/- 2.4, After: 13.5 +/- 2.5 degrees C; P < 0.05), the number of waves (Pre: 1.1 +/- 1.0, After: 1.7 +/- 1.1; P < 0.001) and the thermal sensation (Pre: 1.7 +/- 0.9, After: 2.5 +/- 1.4; P < 0.001), after training. In conclusion, the aforementioned endurance exercise training significantly improved the finger CIVD response during cold-water hand immersion.

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“…It has been previously shown that an individual's thermal status affects the CIVD response (Daanen and Ducharme, 1999;Dobnikar et al, 2009;Flouris et al, 2008). In the current study, the thermal status of the subjects was indicated by T tympanic , which is a valid index of core temperature ( Flouris and Cheung, 2010;Mekjavic et al, 1992), and the T avg prior to the hand immersion in the warm water.…”

Section: Methodological Considerationsmentioning

confidence: 98%

The Effect of a Sleep High–Train Low Regimen on the Finger Cold-Induced Vasodilation Response

Amon

Keramidas

Kounalakis

et al. 2012

High Altitude Medicine & Biology

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The present study evaluated the effect of a sleep high-train low regimen on the finger cold-induced vasodilation (CIVD) response. Seventeen healthy males were assigned to either a control (CON; n=9) or experimental (EXP; n=8) group. Each group participated in a 28-day aerobic training program of daily 1-h exercise (50% of peak power output). During the training period, the EXP group slept at a simulated altitude of 2800 meters (week 1) to 3400 m (week 4) above sea level. Normoxic (CIVD(NOR); CON and EXP groups) and hypoxic (CIVD(HYPO); F(I)O(2)=0.12; EXP group only) CIVD characteristics were assessed before and after the training period during a 30-min immersion of the hand in 8°C water. After the intervention, the EXP group had increased average finger skin temperature (CIVD(NOR): +0.5°C; CIVD(HYPO): +0.5°C), number of waves (CIVD(NOR): +0.5; CIVD(HYPO): +0.6), and CIVD amplitude (CIVD(NOR): +1.5°C; CIVD(HYPO): +3°C) in both CIVD tests (p<0.05). In contrast, the CON group had an increase in only the CIVD amplitude (+0.5°C; p<0.05). Thus, the enhancement of aerobic performance combined with altitude acclimatization achieved with the sleep high-train low regimen contributed to an improved finger CIVD response during cold-water hand immersion in both normoxic and hypoxic conditions.

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The effect of exercise-induced elevation in core temperature on cold-induced vasodilatation response in toes

Cited by 24 publications

References 18 publications

Prolonged physical inactivity leads to a drop in toe skin temperature during local cold stress

Prolonged physical inactivity leads to a drop in toe skin temperature during local cold stress

Enhancement of the finger cold-induced vasodilation response with exercise training

The Effect of a Sleep High–Train Low Regimen on the Finger Cold-Induced Vasodilation Response

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