Anaerobic exercise - Induced changes in serum mineral concentrations

Abstract

Anaerobic exercise, a non 02 – dependent energy metabolism leads to transient metabolic changes, which are corrected gradually by homestatic mechanism. We investigated in eight male subjects, the effects of anaerobic exercise after a day sedentary activity on serum mineral concentration. There was significant variation in the
concentration of serum potassium (F= 4.99,P<0.00)and zinc (F=22.48, P<0.05) on sedentary day. On the other hand, serum magnesium, and calcium were unchanged. Anaerobic exercise induced a significant increase in the serum concentrations of calcium (2.11±0.13 vs2.39 ± 0.12 mmol/L, P<0.05), potassium (4.0± 0.4vs 5.3 ± 0.3 mmol/L,P<0.05), and zinc (12.01± 1.48vs 15.96± 1.60 umol/L,P<0.05). Twelve hours later, magnesium (0.88±
0.05,mmol/L,P<0.05} concentration remained high, potassium and calcium concentrations normalized, while zinc concentrated decreased below the pre-exercise value(9.56± 0.81 umol/L,P<0.05}. Urinary magnesium (4.68± 1.27vs2.60± 0.66 umol/min,P<0.05)and zinc(13.71± 3.77 vs8.58 ± 2.28 nmol/min, p<0.05) increased, while calcium (2.40± 1.14vs 2.33± 1.10 ìmo/min, NS), potassium (20.26 ±7.03 vs 24.26 ± 4.82 ìmol/min, NS) and the urinary output
(0.93±0.38 vs 0.78±0.26ml/min, NS) did not change significantly on the day of exercise compared to the sedentary day. The result presented show clearly that mineral concentration vary greatly within given periods of time and more so after anaerobic exercise.