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Sweat iron concentration during 4-week exercise training
Tomasz Saran1, Magdalena Zawadka2, Stanisław Chmiel3
1Department of General and Neurorehabilitation, Witold Chodźko Institute of Rural Health, Lublin, Poland. saran.tomasz@imw.lublin.pl.
Annals of Agricultural and Environmental Medicine : AAEM
|September 28, 2018
Summary
This study found that iron loss through sweat significantly increases during a 4-week exercise program in untrained individuals. This increased iron excretion may be linked to improved thermoregulation and could indicate iron deficiency in active people.
Area of Science:
- Exercise Physiology
- Human Physiology
- Sports Medicine
Background:
- Sweating is a known pathway for iron loss.
- The impact of physical activity on iron status in sweat for untrained individuals remains unclear.
Purpose of the Study:
- To analyze iron concentration in sweat during a 4-week exercise training program.
- To determine changes in iron excretion in response to exercise over time.
Main Methods:
- 43 untrained volunteers underwent a 4-week exercise program (cycle ergometer, cross-trainer).
- Exercise duration increased weekly from 8 to 15 minutes per device at 85% maximal heart rate.
- Sterile sweat patches were used to collect sweat samples between shoulder blades.
Main Results:
- Iron concentration in sweat remained comparable between day 1 and day 15.
- A significant increase in iron concentration was observed by day 28 compared to day 1 (p<0.001) and day 14 (p<0.006).
- Median iron concentration rose from 21.2 ppb on day 1 to 286.2 ppb on day 28, with a corresponding increase in sodium concentration (p<0.005).
Conclusions:
- A 4-week exercise program leads to a significant increase in iron sweat loss.
- This increase may be attributed to enhanced thermoregulation and sweat gland activity.
- Elevated iron sweat loss could serve as an indicator of iron deficiency in physically active individuals.
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