Sweat mineral-element responses during 7 h of exercise-heat stress.

@article{Montain2007SweatMR,
  title={Sweat mineral-element responses during 7 h of exercise-heat stress.},
  author={Scott Montain and Samuel N Cheuvront and Henry C Lukaski},
  journal={International journal of sport nutrition and exercise metabolism},
  year={2007},
  volume={17 6},
  pages={
          574-82
        }
}
CONTEXT Uncertainty exists regarding the effect of sustained sweating on sweat mineral-element composition. PURPOSE To determine the effect of multiple hours of exercise-heat stress on sweat mineral concentrations. METHODS Seven heat-acclimated subjects (6 males, 1 female) completed 5 x 60 min of treadmill exercise (1.56 m/s, 2% grade) with 20 min rest between exercise periods in 2 weather conditions (27 degrees C, 40% relative humidity, 1 m/s and 35 degrees C, 30%, 1 m/s). Sweat was… Expand
Effect of heat acclimation on sweat minerals.
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Exercise-heat acclimation conserves arm sweat mineral concentrations and possibly whole-body sweat losses of calcium, copper, and magnesium, and may reduce sweat iron and zinc concentrations. Expand
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TLDR
Regional sweat [Ca], [Mg], and [Cu] are not accurate surrogates for or significantly correlated with WBW sweat composition. Expand
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Influence of a high-temperature programme on serum, urinary and sweat levels of selenium and zinc.
TLDR
Exposure to heat at high temperatures increases the urinary excretion of Se and Zn, elements related to antioxidant systems. Expand
Surface contamination artificially elevates initial sweat mineral concentrations.
TLDR
Several sweat mineral element concentrations decline with serial sampling, and initial arm bag sweat mineral concentrations were greater than those in the sweat pouch, and [Ca], [Cu], [Mg], and [Zn] declined 26-76% from initial to the subsequent samples, becoming similar to sweat pouch. Expand
A Case-Series Observation of Sweat Rate Variability in Endurance-Trained Athletes
TLDR
The significant differences in SR within each temperature range indicates a single assessment may not accurately represent an individual’s typical SR even in similar environmental conditions. Expand
Effects of exposure to high temperatures on serum, urine and sweat concentrations of iron and copper.
TLDR
There was a decrease in excretion of Fe in sweat due to HEHT, and an increase in urinary excretion in both, and it is thought that in conditions of high temperatures for long periods of time, attention should be paid to the body levels of these metals. Expand
Evaluation of the Megaduct sweat collector for mineral analysis.
TLDR
TheMegaduct sweat collector appears to avoid skin encapsulation and hidromeiosis, and captures sweat with similar mineral concentrations as reported in the literature for pouches, however, the filling time of the Megaduct may not capture possible changes in sweat mineral concentrations that are documented to occur in as little as 15 to 30 min. Expand
Fluid and electrolyte losses associated with working/exercising for prolonged periods in thermally stressful environments
When working or exercising for prolonged periods in hot and humid environmental conditions, high sweat rates can lead to dehydration and electrolyte imbalance. It is well established that theseExpand
The effect of heat acclimation on sweat microminerals: artifact of surface contamination.
TLDR
Heat acclimation does not confer reductions in sweat Ca, Cu, Mg, or Zn when the skin surface is not cleaned, mineral residue inflates initial sweat mineral concentrations. Expand
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