Chapter 5
Keeping Active with the Activity App
People have a variety of reasons for obtaining and using an Apple Watch, but the predominant reason for many is the idea that it will help them to be healthier. Scientific studies have shown that inactivity leads to ill health, while becoming more active enhances health. A device that a person wears, such as a watch, can be a powerful tool to motivate that person to be more active than they otherwise would.
What Weightlessness Does to Astronauts in Orbit
I imagine that you have heard that when astronauts come back to Earth after several months in space, they are considerably weakened. Figure 5-1 shows three astronauts who have just spent several months in orbit. They have lost bone mass and muscle ...
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