Bouncing Off Course: How Space Travel Weakens BonesIn space, however, this stress is absent. Microgravity tricks the body into thinking bones aren't needed as much. Bone-building cells slow down, while cells that break down bone continue working at their normal pace. The result? Weaker, more brittle bones. Astronauts can lose up to 1-2% of their bone density every month they spend in space!The Long-Term ImpactThis bone loss can have serious consequences for astronauts. When they return to Earth, their weakened bones are more susceptible to fractures. This is especially worrisome for longer space missions, like a trip to Mars.The effects of microgravity on bones are also relevant for us here on Earth. People who experience extended periods of bed rest, due to illness or injury, face similar bone loss issues. Understanding how microgravity weakens bones can help us develop better methods to prevent bone loss in both astronauts and people with limited mobility.Combating the Bony BluesSpace agencies are working hard to combat the negative effects of microgravity on bones. Astronauts on the International Space Station perform regular weight-bearing exercises to simulate the stress of gravity on their bones. They also receive specific diets rich in calcium and vitamin D, both crucial for bone health.