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… 
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Regional sweat [Ca], [Mg], and [Cu] are not accurate surrogates for or significantly correlated with WBW sweat composition.

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Influence of a high-temperature programme on serum, urinary and sweat levels of selenium and zinc.

Surface contamination artificially elevates initial sweat mineral concentrations.

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Influence of Physical Exercises on Salt Loss and Sweat Rate Level

The present study suggested that, there was a significant association among the selected variables among the sweat Na, Nacl, sweat rate and percentage of loss of body mass level.

A Case-Series Observation of Sweat Rate Variability in Endurance-Trained Athletes

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.

Effects of exposure to high temperatures on serum, urine and sweat concentrations of iron and copper.

Evaluation of the Megaduct sweat collector for mineral analysis

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.

Fluid and electrolyte losses associated with working/exercising for prolonged periods in thermally stressful environments

Based on the findings from three studies, fluid and electrolyte replacement recommendations have been made for both manual workers and athletes working and exercising in thermally stressful environments and increasing the sodium content of fluid and food provided to workers is warranted and may reduce the incidence of work related illness and accidents.
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