Calcium loading and renal function in trained subjects during restriction of muscular activity and chronic hyperhydration.

摘要: It was suggested that negative calcium balance is not based on the shortage of in diet, but decreased tissular capacity body to retain during hypokinesia (decreased muscular activity), and chronic hyperhydration may be used normalize balance. To evaluate this hypothesis studies were performed 30 long distance runners aged 23–26 yr, with an average maximum oxygen uptake 65 mL/kg/min 364 d (HK). All volunteers divided into three equal groups: Ten placed continuously under 14.9 km/d (control subjects), ten subjected HK (hypokinetic submitted daily consumption additional amount 26 mL water/kg wt 0.16 g sodium chloride (NaCl)/kg (hyperhydrated subjects). For simulation hypokinetic effect, hyperhydrated kept 2.7 km/day for d. During prehypokinetic period lactate loading tests (0.55 mEq/kg wt) performed. Urinary blood electrolytes (sodium, ionized calcium, total magnesium, phosphate) parathyroid hormone (PTH) determined. concentrations thereof increased significantly volunteers. Blood content After tests, displayed a faster excretion PTH as compared control groups concluded deficiency associated whereas prevent endurance trained prolonged restriction activity.