Even in space, astronauts can’t miss a beat. A recent study on the International Space Station had 12 astronauts use ultrasound machines to monitor the condition of the heart before, during and after flight. Results reveal the shape of the heart becomes more spherical during extended time in microgravity. Researchers from the American College of Cardiology say these findings could lead to cardiac problems for the crew even though the heart returns to a normal elongated shape after returning to Earth. The heart doesn’t
have to work as hard in space which leads to loss of muscle mass ultimately causing the change. The hope is to find ways to counter the problem starting with the amount and type of exercise needed to guarantee safety on long duration flights.

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