How astronauts can combat the effects of space travel on the muscular and circulatory systems.?

Astronauts can combat the effects of space travel on their muscular and circulatory systems through a combination of regular exercise and resistance training. They use specialized equipment, such as treadmills and resistance machines, to maintain muscle mass and cardiovascular health in the microgravity environment. Additionally, nutritional strategies, including adequate protein intake and hydration, help support muscle maintenance and overall physiological function. Monitoring and countermeasures, such as compression garments, also aid in reducing fluid shifts and ensuring cardiovascular stability during long missions.