Fig. 5

Transepithelial calcium transport in the duodenum of 4, 6, and 8-week swimming rats, and their respective age-matched sedentary controls. The epithelium was bathed on both sides with the same bathing solution containing 1.25 mmol/L calcium. ***P < 0.001 compared with the age-matched sedentary controls. Numbers in parentheses represent the numbers of experimental animals