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Variations in serum magnesium and hormonal levels during incremental exercise
Marisol Soria1, Carlos González-Haro1, Miguel Angel Ansón1
1Pharmacology and Physiology Department School of Medicine, University of Zaragoza, Spain.
Magnesium Research
|February 4, 2015
Summary
Plasma magnesium levels remained stable during incremental exercise in endurance athletes. Hormonal changes, including increased catecholamines and cortisol, suggest a complex interplay influencing magnesium status during exertion.
Area of Science:
- Exercise Physiology
- Endocrinology
- Sports Nutrition
Background:
- Magnesium is crucial for numerous physiological processes, including energy metabolism and muscle function.
- Endurance athletes experience significant physiological stress during prolonged exercise, potentially affecting electrolyte balance.
- Hormonal responses to exercise are well-documented, but their interaction with magnesium status requires further investigation.
Purpose of the Study:
- To investigate the relationship between plasma magnesium concentrations and hormonal variations in well-trained male endurance athletes during an incremental exercise test.
- To understand how hormones like catecholamines, insulin, glucagon, PTH, calcitonin, aldosterone, and cortisol change in response to exercise and recovery.
- To explore the potential influence of these hormonal shifts on magnesium status during exercise.
Main Methods:
- 27 well-trained male endurance athletes underwent a graded incremental exercise test to exhaustion.
- Plasma levels of magnesium and key hormones (catecholamines, insulin, glucagon, PTH, calcitonin, aldosterone, cortisol) were measured at rest, during exercise stages, and post-exercise.
- Standardized warm-up and exercise protocols were employed to ensure consistent testing conditions.
Main Results:
- Plasma magnesium levels showed no significant variation throughout the incremental exercise test.
- Significant increases were observed in plasma adrenaline, noradrenaline, parathyroid hormone (PTH), glucagon, and cortisol levels.
- Plasma insulin levels decreased significantly during exercise, while calcitonin remained stable; both returned to baseline during recovery.
Conclusions:
- Plasma magnesium levels appear stable in euhydrated endurance athletes during incremental exercise, despite significant hormonal fluctuations.
- The observed hormonal variations (catecholamines, PTH, glucagon, cortisol, insulin) during exercise and recovery highlight a complex endocrine response.
- Magnesium status during exercise in athletes may be influenced by the intricate interplay between these hormonal changes and hydration status.
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