Variations in leptin and insulin levels within one swimming season in non-obese female cold water swimmers |
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| Authors: | Magdalena Gibas-Dorna Zuzanna Checinska Emilia Korek Justyna Kupsz Anna Sowinska Malgorzata Wojciechowska |
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| Affiliation: | 1. Department of Physiology, Poznan University of Medical Sciences, Poznan, Poland;2. Department of Informatics and Statistics, Poznan University of Medical Sciences, Poznan, Poland;3. Mother and Child Health, Poznan University of Medical Sciences, Poznan, Poland |
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| Abstract: | Aim: We examined whether cold water swimming for seven consecutive months changes basal leptin and insulin concentrations and insulin sensitivity in healthy non-obese women.Materials and methods: Fourteen recreational female swimmers aged 45?±?8.7 years, regularly swimming outdoors during winter months were exposed to cold water at least twice a week. Fasting blood samples were collected in October, January and April. Serum leptin, insulin and glucose concentrations were tested and insulin sensitivity was calculated using updated model HOMA2.Results: Repeated cold water baths significantly increased insulin sensitivity and decreased insulin and leptin concentrations (p?=?0.006, p?=?0.032, p?=?0.042, respectively). Leptin concentration positively correlated with body-mass index (BMI) and insulin level (r?=?0.412, r?=?0.868, respectively). Insulin level inversely correlated with insulin sensitivity and positively with glucose (r = ?0.893, r?=?0.166, respectively). No associations between leptin and insulin sensitivity were found.Conclusion: Regular cold water swimming may stimulate metabolic changes suggesting that leptin and insulin participate in adaptive metabolic mechanisms triggered by repeated cold exposure accompanied by mild exercise in healthy non-obese women. |
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| Keywords: | Cold water swimming insulin insulin sensitivity leptin |
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