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Cold-induced vasodilation during single digit immersion in 0°C and 8°C water in men and women.

Tyler CJ, Reeve T, Cheung SS - PLoS ONE (2015)

Bottom Line: Females reported feeling higher thermal sensations in 8°C and lower pain sensations in 0°C and 8°C compared to males.Fewer CIVD responses were observed when using a 4°C (1 (0-3)) threshold to quantify a CIVD wave compared to using a 1°C (2 (0-3)) or 0.5°C (2 (0-3)) amplitude.In conclusion, both 0 and 8 °C can elicit CIVD but 8°C may be more suitable when looking to optimise the number of CIVD waves while minimising participant discomfort.

View Article: PubMed Central - PubMed

Affiliation: Department of Life Sciences, University of Roehampton, London, United Kingdom.

ABSTRACT
The present study compared the thermal responses of the finger to 0 and 8°C water immersion, two commonly used temperatures for cold-induced vasodilation (CIVD) research. On two separate and counterbalanced occasions 15 male and 15 female participants immersed their index finger in 20°C water for 5 min followed by either 0 or 8°C water for 30 min. Skin temperature, cardiovascular and perceptual data were recorded. Secondary analyses were performed between sexes and comparing 0.5, 1 and 4°C CIVD amplitude thresholds. With a 0.5°C threshold, CIVD waves were more prevalent in 8°C (2 (1-3) than in 0°C (1.5 (0-3)), but the amplitude was lower (4.0 ± 2.3 v 9.2 ± 4.0°C). Mean, minimum and maximum finger temperatures were lower in 0°C during the 30 min immersion, and CIVD onset and peak time occurred later in 0°C. Thermal sensation was lower and pain sensation was higher in 0°C. There were no differences between males and females in any of the physiological or CIVD data with the exception of SBP, which was higher in males. Females reported feeling higher thermal sensations in 8°C and lower pain sensations in 0°C and 8°C compared to males. Fewer CIVD responses were observed when using a 4°C (1 (0-3)) threshold to quantify a CIVD wave compared to using a 1°C (2 (0-3)) or 0.5°C (2 (0-3)) amplitude. In conclusion, both 0 and 8 °C can elicit CIVD but 8°C may be more suitable when looking to optimise the number of CIVD waves while minimising participant discomfort. The CIVD response to water immersion does not appear to be influenced by sex. Researchers should consider the amplitude threshold that was used to determine a CIVD wave when interpreting previous data.

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Median (range) frequency (N) when using amplitude thresholds of 0.5, 1 and 4°C.Grey fill = 0°C trial; Black fill = 8°C; *** = significantly lower than 0.5°C and 1°C (p < 0.001).
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pone.0122592.g002: Median (range) frequency (N) when using amplitude thresholds of 0.5, 1 and 4°C.Grey fill = 0°C trial; Black fill = 8°C; *** = significantly lower than 0.5°C and 1°C (p < 0.001).

Mentions: Fig 2 displays the median (range) frequency when using amplitude thresholds of 0.5, 1 and 4°C. There was a significant main effect for amplitude threshold (χ22 = 65, p < 0.001). Pairwise analyses revealed that fewer CIVD responses were observed when using 4°C (Mdn = 1 (0–3)) compared to 0.5°C (Mdn = 2 (0–3); z = -5.2, p < 0.001, r = -0.67) and 1°C (Mdn = 2 (0–3); z = -5.2, p < 0.001, r = -0.67). There was no difference between 0.5 and 1°C compared to 0.5°C (z = -1.0, p = 0.6, r = -0.14).


Cold-induced vasodilation during single digit immersion in 0°C and 8°C water in men and women.

Tyler CJ, Reeve T, Cheung SS - PLoS ONE (2015)

Median (range) frequency (N) when using amplitude thresholds of 0.5, 1 and 4°C.Grey fill = 0°C trial; Black fill = 8°C; *** = significantly lower than 0.5°C and 1°C (p < 0.001).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4401544&req=5

pone.0122592.g002: Median (range) frequency (N) when using amplitude thresholds of 0.5, 1 and 4°C.Grey fill = 0°C trial; Black fill = 8°C; *** = significantly lower than 0.5°C and 1°C (p < 0.001).
Mentions: Fig 2 displays the median (range) frequency when using amplitude thresholds of 0.5, 1 and 4°C. There was a significant main effect for amplitude threshold (χ22 = 65, p < 0.001). Pairwise analyses revealed that fewer CIVD responses were observed when using 4°C (Mdn = 1 (0–3)) compared to 0.5°C (Mdn = 2 (0–3); z = -5.2, p < 0.001, r = -0.67) and 1°C (Mdn = 2 (0–3); z = -5.2, p < 0.001, r = -0.67). There was no difference between 0.5 and 1°C compared to 0.5°C (z = -1.0, p = 0.6, r = -0.14).

Bottom Line: Females reported feeling higher thermal sensations in 8°C and lower pain sensations in 0°C and 8°C compared to males.Fewer CIVD responses were observed when using a 4°C (1 (0-3)) threshold to quantify a CIVD wave compared to using a 1°C (2 (0-3)) or 0.5°C (2 (0-3)) amplitude.In conclusion, both 0 and 8 °C can elicit CIVD but 8°C may be more suitable when looking to optimise the number of CIVD waves while minimising participant discomfort.

View Article: PubMed Central - PubMed

Affiliation: Department of Life Sciences, University of Roehampton, London, United Kingdom.

ABSTRACT
The present study compared the thermal responses of the finger to 0 and 8°C water immersion, two commonly used temperatures for cold-induced vasodilation (CIVD) research. On two separate and counterbalanced occasions 15 male and 15 female participants immersed their index finger in 20°C water for 5 min followed by either 0 or 8°C water for 30 min. Skin temperature, cardiovascular and perceptual data were recorded. Secondary analyses were performed between sexes and comparing 0.5, 1 and 4°C CIVD amplitude thresholds. With a 0.5°C threshold, CIVD waves were more prevalent in 8°C (2 (1-3) than in 0°C (1.5 (0-3)), but the amplitude was lower (4.0 ± 2.3 v 9.2 ± 4.0°C). Mean, minimum and maximum finger temperatures were lower in 0°C during the 30 min immersion, and CIVD onset and peak time occurred later in 0°C. Thermal sensation was lower and pain sensation was higher in 0°C. There were no differences between males and females in any of the physiological or CIVD data with the exception of SBP, which was higher in males. Females reported feeling higher thermal sensations in 8°C and lower pain sensations in 0°C and 8°C compared to males. Fewer CIVD responses were observed when using a 4°C (1 (0-3)) threshold to quantify a CIVD wave compared to using a 1°C (2 (0-3)) or 0.5°C (2 (0-3)) amplitude. In conclusion, both 0 and 8 °C can elicit CIVD but 8°C may be more suitable when looking to optimise the number of CIVD waves while minimising participant discomfort. The CIVD response to water immersion does not appear to be influenced by sex. Researchers should consider the amplitude threshold that was used to determine a CIVD wave when interpreting previous data.

Show MeSH
Related in: MedlinePlus