Tattoos do not affect exercise-induced localised sweat rate or sodium concentration

Ethan Rogers, Christopher Irwin, Danielle McCartney, Gregory R. Cox, Ben Desbrow

Research output: Contribution to journalArticleResearchpeer-review

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Abstract

Objectives: Skin tattoos have been shown to reduce localised sweat rate and increase sweat sodium concentration ([Na+]) when sweating is artificially stimulated. This study investigated whether similar responses are observed with exercise-induced sweating. Design: Unblinded, within-participant control, single trial. Methods: Twenty-two healthy individuals (25.1 ± 4.8 y (Mean ± SD), 14 males) with a unilateral tattoo ≥11.4 cm2 in size, ≥2 months in age, and shaded ≥50% participated in this investigation. Participants undertook 20 min of intermittent cycling (4 × 5 min intervals) on a stationary ergometer in a controlled environment (24.6 ± 1.1 °C; 64 ± 6% RH). Resultant sweat was collected into absorbent patches applied at two pairs of contralateral skin sites (pair 1: Tattoo vs. Non-Tattoo; pair 2: Control 1 vs. Control 2 (both non-tattooed)), for determination of sweat rate and sweat [Na+]. Paired samples t-tests were used to determine differences between contralateral sites. Results: Tattoo vs. Non-Tattoo: Neither sweat rate (Mean ± SD: 0.92 ± 0.37 vs. 0.94 ± 0.43 mg·cm−2·min−1, respectively; p = 0.693) nor sweat [Na+] (Median(IQR): 37(32–52) vs. 37(31–45) mM·L−1, respectively; p = 0.827) differed. Control 1 vs. Control 2: Neither sweat rate (Mean±SD: 1.19 ± 0.53 vs. 1.19 ± 0.53 mg·cm−2·min−1, respectively; p = 0.917) nor sweat [Na+] (Median(IQR): 29(26–41) vs. 31(25–43) mM·L−1, respectively; p = 0.147) differed. The non-significant differences for sweat rate and [Na+] between Tattoo vs. Non-Tattoo were inside the range of the within participant variability (sweat rate CVi = 5.4%; sweat [Na+] CVi = 4.4%). Conclusions: Skin tattoos do not appear to alter the rate or [Na+] of exercise-induced sweating. The influence of skin tattoos on localised sweat responses may have previously been over-estimated.

Original languageEnglish
Pages (from-to)1249-1253
Number of pages5
JournalJournal of Science and Medicine in Sport
Volume22
Issue number11
Early online date19 Jun 2019
DOIs
Publication statusPublished - 1 Nov 2019

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Rogers, Ethan ; Irwin, Christopher ; McCartney, Danielle ; Cox, Gregory R. ; Desbrow, Ben. / Tattoos do not affect exercise-induced localised sweat rate or sodium concentration. In: Journal of Science and Medicine in Sport. 2019 ; Vol. 22, No. 11. pp. 1249-1253.
@article{46c832f8a1414e8ebed601a644f509f4,
title = "Tattoos do not affect exercise-induced localised sweat rate or sodium concentration",
abstract = "Objectives: Skin tattoos have been shown to reduce localised sweat rate and increase sweat sodium concentration ([Na+]) when sweating is artificially stimulated. This study investigated whether similar responses are observed with exercise-induced sweating. Design: Unblinded, within-participant control, single trial. Methods: Twenty-two healthy individuals (25.1 ± 4.8 y (Mean ± SD), 14 males) with a unilateral tattoo ≥11.4 cm2 in size, ≥2 months in age, and shaded ≥50{\%} participated in this investigation. Participants undertook 20 min of intermittent cycling (4 × 5 min intervals) on a stationary ergometer in a controlled environment (24.6 ± 1.1 °C; 64 ± 6{\%} RH). Resultant sweat was collected into absorbent patches applied at two pairs of contralateral skin sites (pair 1: Tattoo vs. Non-Tattoo; pair 2: Control 1 vs. Control 2 (both non-tattooed)), for determination of sweat rate and sweat [Na+]. Paired samples t-tests were used to determine differences between contralateral sites. Results: Tattoo vs. Non-Tattoo: Neither sweat rate (Mean ± SD: 0.92 ± 0.37 vs. 0.94 ± 0.43 mg·cm−2·min−1, respectively; p = 0.693) nor sweat [Na+] (Median(IQR): 37(32–52) vs. 37(31–45) mM·L−1, respectively; p = 0.827) differed. Control 1 vs. Control 2: Neither sweat rate (Mean±SD: 1.19 ± 0.53 vs. 1.19 ± 0.53 mg·cm−2·min−1, respectively; p = 0.917) nor sweat [Na+] (Median(IQR): 29(26–41) vs. 31(25–43) mM·L−1, respectively; p = 0.147) differed. The non-significant differences for sweat rate and [Na+] between Tattoo vs. Non-Tattoo were inside the range of the within participant variability (sweat rate CVi = 5.4{\%}; sweat [Na+] CVi = 4.4{\%}). Conclusions: Skin tattoos do not appear to alter the rate or [Na+] of exercise-induced sweating. The influence of skin tattoos on localised sweat responses may have previously been over-estimated.",
author = "Ethan Rogers and Christopher Irwin and Danielle McCartney and Cox, {Gregory R.} and Ben Desbrow",
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Tattoos do not affect exercise-induced localised sweat rate or sodium concentration. / Rogers, Ethan; Irwin, Christopher; McCartney, Danielle; Cox, Gregory R.; Desbrow, Ben.

In: Journal of Science and Medicine in Sport, Vol. 22, No. 11, 01.11.2019, p. 1249-1253.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Tattoos do not affect exercise-induced localised sweat rate or sodium concentration

AU - Rogers, Ethan

AU - Irwin, Christopher

AU - McCartney, Danielle

AU - Cox, Gregory R.

AU - Desbrow, Ben

PY - 2019/11/1

Y1 - 2019/11/1

N2 - Objectives: Skin tattoos have been shown to reduce localised sweat rate and increase sweat sodium concentration ([Na+]) when sweating is artificially stimulated. This study investigated whether similar responses are observed with exercise-induced sweating. Design: Unblinded, within-participant control, single trial. Methods: Twenty-two healthy individuals (25.1 ± 4.8 y (Mean ± SD), 14 males) with a unilateral tattoo ≥11.4 cm2 in size, ≥2 months in age, and shaded ≥50% participated in this investigation. Participants undertook 20 min of intermittent cycling (4 × 5 min intervals) on a stationary ergometer in a controlled environment (24.6 ± 1.1 °C; 64 ± 6% RH). Resultant sweat was collected into absorbent patches applied at two pairs of contralateral skin sites (pair 1: Tattoo vs. Non-Tattoo; pair 2: Control 1 vs. Control 2 (both non-tattooed)), for determination of sweat rate and sweat [Na+]. Paired samples t-tests were used to determine differences between contralateral sites. Results: Tattoo vs. Non-Tattoo: Neither sweat rate (Mean ± SD: 0.92 ± 0.37 vs. 0.94 ± 0.43 mg·cm−2·min−1, respectively; p = 0.693) nor sweat [Na+] (Median(IQR): 37(32–52) vs. 37(31–45) mM·L−1, respectively; p = 0.827) differed. Control 1 vs. Control 2: Neither sweat rate (Mean±SD: 1.19 ± 0.53 vs. 1.19 ± 0.53 mg·cm−2·min−1, respectively; p = 0.917) nor sweat [Na+] (Median(IQR): 29(26–41) vs. 31(25–43) mM·L−1, respectively; p = 0.147) differed. The non-significant differences for sweat rate and [Na+] between Tattoo vs. Non-Tattoo were inside the range of the within participant variability (sweat rate CVi = 5.4%; sweat [Na+] CVi = 4.4%). Conclusions: Skin tattoos do not appear to alter the rate or [Na+] of exercise-induced sweating. The influence of skin tattoos on localised sweat responses may have previously been over-estimated.

AB - Objectives: Skin tattoos have been shown to reduce localised sweat rate and increase sweat sodium concentration ([Na+]) when sweating is artificially stimulated. This study investigated whether similar responses are observed with exercise-induced sweating. Design: Unblinded, within-participant control, single trial. Methods: Twenty-two healthy individuals (25.1 ± 4.8 y (Mean ± SD), 14 males) with a unilateral tattoo ≥11.4 cm2 in size, ≥2 months in age, and shaded ≥50% participated in this investigation. Participants undertook 20 min of intermittent cycling (4 × 5 min intervals) on a stationary ergometer in a controlled environment (24.6 ± 1.1 °C; 64 ± 6% RH). Resultant sweat was collected into absorbent patches applied at two pairs of contralateral skin sites (pair 1: Tattoo vs. Non-Tattoo; pair 2: Control 1 vs. Control 2 (both non-tattooed)), for determination of sweat rate and sweat [Na+]. Paired samples t-tests were used to determine differences between contralateral sites. Results: Tattoo vs. Non-Tattoo: Neither sweat rate (Mean ± SD: 0.92 ± 0.37 vs. 0.94 ± 0.43 mg·cm−2·min−1, respectively; p = 0.693) nor sweat [Na+] (Median(IQR): 37(32–52) vs. 37(31–45) mM·L−1, respectively; p = 0.827) differed. Control 1 vs. Control 2: Neither sweat rate (Mean±SD: 1.19 ± 0.53 vs. 1.19 ± 0.53 mg·cm−2·min−1, respectively; p = 0.917) nor sweat [Na+] (Median(IQR): 29(26–41) vs. 31(25–43) mM·L−1, respectively; p = 0.147) differed. The non-significant differences for sweat rate and [Na+] between Tattoo vs. Non-Tattoo were inside the range of the within participant variability (sweat rate CVi = 5.4%; sweat [Na+] CVi = 4.4%). Conclusions: Skin tattoos do not appear to alter the rate or [Na+] of exercise-induced sweating. The influence of skin tattoos on localised sweat responses may have previously been over-estimated.

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U2 - 10.1016/j.jsams.2019.06.004

DO - 10.1016/j.jsams.2019.06.004

M3 - Article

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SP - 1249

EP - 1253

JO - Journal of Science and Medicine in Sport

JF - Journal of Science and Medicine in Sport

SN - 1440-2440

IS - 11

ER -