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
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Effect of heat acclimation on sweat minerals.
TLDR
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
Exercise-induced trace mineral element concentration in regional versus whole-body wash-down sweat.
TLDR
Regional sweat [Ca], [Mg], and [Cu] are not accurate surrogates for or significantly correlated with WBW sweat composition. Expand
Ingestion of sodium plus water improves cardiovascular function and performance during dehydrating cycling in the heat
TLDR
It is suggested that pre‐exercise ingestion of salt plus water maintains higher plasma volume during dehydrating exercise in the heat without thermoregulatory effects, which maintains cardiovascular function and improves cycling performance. Expand
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 these… Expand
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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References

SHOWING 1-10 OF 27 REFERENCES
The effects of heat and exercise on sweat iron loss.
TLDR
Results suggest that the use of resting sweat iron concentration to estimate iron loss for 1 h of exercise in neutral environments is accurate but may overestimate iron loss during exercise in hot environments and during more prolonged exercise. Expand
The reproducibility of closed-pouch sweat collection and thermoregulatory responses to exercise–heat stress
TLDR
It is proposed that moderate variations in sweat composition were influenced by variations in the local sweat rate, which were induced by application of the pouch. Expand
Sweat iron and zinc losses during prolonged exercise.
TLDR
A possible iron conservation that prevents excessive iron loss during prolonged exercise is suggested. Expand
Zinc loss in sweat of athletes exercising in hot and neutral temperatures.
TLDR
There was a significant interaction of time, gender, and temperature for whole-body sweat rates (WBSR). Expand
Calcium losses resulting from an acute bout of moderate-intensity exercise.
The purpose of this study was to compare daily calcium (Ca) losses in sweat (S) and urine (U) on an exercise day (E) with losses on the preceding day (i.e., a rest day) during which no exercise (NE)… Expand
Seasonal variation of trace element loss to sweat during exercise in males
TLDR
It is suggested that there was no significant difference in the amount of loss of trace elements in sweat due to exercise between summer and winter. Expand
Sweat composition in exercise and in heat.
TLDR
Total ionic losses do not seem sufficient to deplete body mineral reserves unless many days of training are undertaken in a hot climate, and the data are best explained in terms of an active regulation of sweat composition. Expand
Trace elements in the sweat of acclimatized persons.
  • F. Omokhodion, J. Howard
  • Chemistry, Medicine
  • Clinica chimica acta; international journal of clinical chemistry
  • 1994
TLDR
The findings suggest that the influence of diet in replenishing the body stores of trace elements and the conservation of these elements by the kidneys may play a part in preventing the occurrence of chronic deficiency states in acclimatized persons. Expand
Concentrations of trace elements in sweat during sauna bathing.
TLDR
The amount of trace elements in sweat measured by the arm bag method was less than that by the whole body method; significant differences were observed in Fe and Mn amounts. Expand
Variations in Regional Sweat Composition in Normal Human Males
TLDR
This project aimed to quantify the regional distribution of sweat composition over the skin surface and to determine whether sweat constituent concentrations collected from regional sites can estimate whole‐body concentrations, and is the first investigation to report a positive relationship between sweat [K+] and [lactate. Expand
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