Evidence for an acute rise of intestinal calcium absorption in response to aerobic exercise.

Background: The acute effects of physical activity on intestinal calcium (Ca) uptake and on bone metabolism are not known.

Aim Of The Study: To investigate the consequences of an acute aerobic exercise bout on fractional Ca absorption and on biomarkers of bone turnover.

Methods: With the use of a cross over design, eighteen male athletes, aged 25.

Exercise-trained young men have higher calcium absorption rates and plasma calcitriol levels compared with age-matched sedentary controls.

The effect of physical activity on human calcium (Ca) metabolism is still not completely understood. Thus, we investigated fractional Ca absorption using a stable strontium test (Fc(240)), calciotropic hormones, and renal Ca excretion in 31 young men with a high activity level (GH) and in 26 age-matched sedentary control subjects (GL). Weekly hours spent on physical activity, obtained with a questionnaire were 15.