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Related Experiment Videos

Trace elements and electrolytes in human resting mixed saliva after exercise.

J L Chicharro1, V Serrano, R Ureña

  • 1Facultad de Medicina, Universidad Complutense, Madrid, Spain.

British Journal of Sports Medicine
|June 23, 1999
PubMed
Summary

Intense physical exercise significantly altered saliva electrolyte levels, increasing sodium (Na) and magnesium (Mg) while decreasing manganese (Mn). These findings highlight specific salivary element changes following maximal exertion.

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Area of Science:

  • Sports Medicine
  • Biochemistry
  • Analytical Chemistry

Background:

  • Saliva composition is known to change with physical activity.
  • Electrolytes and trace elements in saliva are important biomarkers.

Purpose of the Study:

  • To investigate the impact of maximal exercise on trace element and electrolyte concentrations in whole saliva.
  • To identify specific salivary components affected by strenuous physical exertion.

Main Methods:

  • Maximal exercise testing was performed on a cycle ergometer by 40 participants.
  • Saliva samples were collected pre- and post-exercise.
  • Inductively coupled plasma mass spectrometry and atomic absorption spectrometry were used to analyze 16 elements (Fe, Mg, Sc, Cr, Mn, Co, Cu, Zn, Se, Sr, Ag, Sb, Cs, Hg, Ca, Na).

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Main Results:

  • Salivary magnesium (Mg) and sodium (Na) levels significantly increased post-exercise (p < 0.05).
  • Manganese (Mn) levels significantly decreased post-exercise (p < 0.05).
  • The molar ratio of zinc to copper (Zn/Cu) remained unchanged.

Conclusions:

  • Maximal physical exercise selectively altered the concentrations of Na, Mg, and Mn in saliva.
  • Only three out of sixteen analyzed elements showed significant changes.
  • Further research is required to understand the clinical significance of these exercise-induced salivary element alterations.