MB and Miyoshi myopathy: In light of the above facts, the aim of this study was to assess the effect of a 6-week Nordic walking training cycle on the blood concentrations of the active metabolite of calcidiol (25(OH)D3), total calcium (Ca), inorganic phosphorus (P), myoglobin (Mb) and lactate dehydrogenase (LDH) activity in MM patients in remission.