Spaceflight osteopenia
…comparison to 1–1.5% bone loss in the elderly per year, and 2–3% in postmenopausal women. Countermeasures Astronaut Sunita "Suni" Williams bungeed to the TVIS treadmill aboard the International Space Station. Since Gemini, exercise has been tried as a way of preventing bone loss, but it has not been shown to be successful…