TY - JOUR JO - Annals of Agricultural and Environmental Medicine J2 - Ann Agric Environ Med. SN - 1232-1966 VL - 25 IS - 3 PY - 2018 ID - Saran2018 TI - Sweat iron concentration during 4-week exercise training AB - Introduction One possible way of iron loss is sweating. It is unclear how physical activity performed by untrained individuals affects the iron status in sweat. Objective The purpose of this study was to analyse iron concentration in sweat during 4-week exercise training to determine the changes in iron excretion during follow-up exercises. Material and methods 43 untrained volunteers participated in the study, 29 of whom completed the full exercise programme. The training programme consisted of exercises on a cycle ergometer and cross-trainer. In the first week, participants exercised for 8 minutes on each device, in the second for 10 minutes, and in the third and fourth weeks they exercised for 15 min on each device. Intensity was submaximal and defined as 85% of maximal heart rate. A sterile sweat patch was placed on the skin between shoulder blades. Results Concentration of iron on the first and the fifteenth day of exercises was comparable and statistically insignificant. Iron concentration was highly increased on the last day of training in comparison with first (p<0.001) and fourteenth day (p<0.006). The median of iron concentration in 29 samples on the first day of sampling was 21.2 ppb, in the fifteenth – 52.5 ppb, and on the twenty-eighth day – 286.2 ppb. In relation with the sodium concentration, the iron content was also increased on the twenty-eighth day of the training programme (p<0.005). Conclusions Iron sweat loss significantly increased during the 4-week exercise programme. A possible explanation may be improvement in the thermoregulation mechanism and secretory activity of sweat glands. Iron sweat loss may be an indicator of iron deficiency observed in active individuals. AU - Saran, Tomasz AU - Zawadka, Magdalena AU - Chmiel, Stanisław AU - Mazur, Anna SP - 500 EP - 503 DA - 2018 DO - 10.26444/aaem/78787 UR - https://doi.org/10.26444/aaem/78787 ER -