This is a "Jugend Forscht 2022" work.
Jumping rope is a sport that is often underestimated. It's twice as effective as jogging and you can do it in the smallest apartment. I programmed an app that counts and analyzes rope jumps. In my app you can set time limits, number of jumps and voice output. I tried different cell phone sensors and found the accelerometer. Looking at the measurement results, I discovered that each rope jump has a similar sequence of acceleration values. When analyzing the measured values, which are between -2m/s² and 40m/s² (i.e. 0 to 4 times the acceleration due to gravity or 0G-4G), I noticed that these are the same accelerations as in astronaut training: In the Centrifuge you have to endure 4G to 5G, with parabolic flights you reach 0G and simulate weightlessness. My app not only measures the number of jumps, but also the G-value you jump off with and how long you are weightless.
Jumping rope is a sport that is often underestimated. It's twice as effective as jogging and you can do it in the smallest apartment. I programmed an app that counts and analyzes rope jumps. In my app you can set time limits, number of jumps and voice output. I tried different cell phone sensors and found the accelerometer. Looking at the measurement results, I discovered that each rope jump has a similar sequence of acceleration values. When analyzing the measured values, which are between -2m/s² and 40m/s² (i.e. 0 to 4 times the acceleration due to gravity or 0G-4G), I noticed that these are the same accelerations as in astronaut training: In the Centrifuge you have to endure 4G to 5G, with parabolic flights you reach 0G and simulate weightlessness. My app not only measures the number of jumps, but also the G-value you jump off with and how long you are weightless.
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