Anna Chu1, Peter Petocz2, Samir Samman3,4. 1. Department of Human Nutrition, University of Otago, PO Box 56, Dunedin, 9054, New Zealand. 2. Department of Statistics, Macquarie University, Sydney, NSW, Australia. 3. Department of Human Nutrition, University of Otago, PO Box 56, Dunedin, 9054, New Zealand. samir.samman@otago.ac.nz. 4. Discipline of Nutrition and Metabolism, School of Molecular Bioscience, University of Sydney, Sydney, NSW, Australia. samir.samman@otago.ac.nz.
Abstract
BACKGROUND: Exercise and the subsequent recovery processes have been proposed to induce disturbances in zinc homeostasis. We previously reported acute increase in serum zinc concentration immediately after aerobic exercise; the change in the indices of zinc status during exercise recovery was not explored. OBJECTIVE: The aim of the current analysis is to determine the changes in zinc biomarkers during recovery from an aerobic exercise bout. METHODS: We conducted a systematic literature search on PubMed, Web of Science, Scopus and SPORTDiscus electronic databases from inception to 20 December 2014 to identify studies that investigated the acute effects of exercise on selected indices of zinc status. Meta-analyses were conducted to determine the change in serum zinc concentration during exercise recovery, defined as up to 4 h following exercise cessation, compared to pre-exercise levels. RESULTS: Forty-five studies were included in the systematic literature review, of which 12 studies (providing 18 comparisons) reported serum zinc levels after the cessation of exercise. During exercise recovery, serum zinc concentration was significantly lower than pre-exercise values (-1.31 ± 0.22 μmol/L, P < 0.001; mean ± SE). Secondary analyses showed a significant decrease of serum zinc levels in all categories of participants' training status, mode of exercise and time of blood collection. Insufficient data were available for meta-analysis of other zinc biomarkers. CONCLUSIONS: The present analysis showed that serum zinc levels decrease significantly during exercise recovery, compared to pre-exercise levels. This extends our previous report of an increase in serum zinc immediately after exercise. We postulate that the exercise-induced fluctuations in zinc homeostasis are linked to the muscle repair mechanisms following exercise; the potential for zinc to enhance the exercise recovery process remains to be determined.
BACKGROUND: Exercise and the subsequent recovery processes have been proposed to induce disturbances in zinc homeostasis. We previously reported acute increase in serum zinc concentration immediately after aerobic exercise; the change in the indices of zinc status during exercise recovery was not explored. OBJECTIVE: The aim of the current analysis is to determine the changes in zinc biomarkers during recovery from an aerobic exercise bout. METHODS: We conducted a systematic literature search on PubMed, Web of Science, Scopus and SPORTDiscus electronic databases from inception to 20 December 2014 to identify studies that investigated the acute effects of exercise on selected indices of zinc status. Meta-analyses were conducted to determine the change in serum zinc concentration during exercise recovery, defined as up to 4 h following exercise cessation, compared to pre-exercise levels. RESULTS: Forty-five studies were included in the systematic literature review, of which 12 studies (providing 18 comparisons) reported serum zinc levels after the cessation of exercise. During exercise recovery, serum zinc concentration was significantly lower than pre-exercise values (-1.31 ± 0.22 μmol/L, P < 0.001; mean ± SE). Secondary analyses showed a significant decrease of serum zinc levels in all categories of participants' training status, mode of exercise and time of blood collection. Insufficient data were available for meta-analysis of other zinc biomarkers. CONCLUSIONS: The present analysis showed that serum zinc levels decrease significantly during exercise recovery, compared to pre-exercise levels. This extends our previous report of an increase in serum zinc immediately after exercise. We postulate that the exercise-induced fluctuations in zinc homeostasis are linked to the muscle repair mechanisms following exercise; the potential for zinc to enhance the exercise recovery process remains to be determined.
Authors: P Galan; F E Viteri; S Bertrais; S Czernichow; H Faure; J Arnaud; D Ruffieux; S Chenal; N Arnault; A Favier; A-M Roussel; S Hercberg Journal: Eur J Clin Nutr Date: 2005-10 Impact factor: 4.016
Authors: Juan Diego Hernández-Camacho; Cristina Vicente-García; Douglas S Parsons; Ignacio Navas-Enamorado Journal: Redox Biol Date: 2020-04-01 Impact factor: 11.799