The overall objective of this study is to investigate whether the daily timing of exercise affects bone turnover markers in postmenopausal women. Results from this clinical trial will provide valuable information to support guidelines of physical activity for people to improve musculoskeletal health, especially post-menopausal women. The scientific questions that will be investigated are:~What are the acute effects of the daily timing of exercise on serum concentrations of bone turnover markers and 24-h total urinary calcium excretion?~Are differences in initial exercise-induced responses of bone turnover markers and urinary Ca excretion maintained across two weeks of exercise training?
The purpose of this study is to find out if moderate exercise at different time during the day (early morning vs early evening) affects biomarker CTX of bone health in normal to overweight postmenopausal women.