Running mouse aka Laufmaus

thingiverse

This is a model of the https://laufmaus.run product, based on an actual 3D model of it. Print in 17cm (longest side) for the bigger hand variant, 15cm for the smaller hand variant. Support is necessary, due to the irregular shape of the bottom. For the left handed side, just flip the model once. You can use velcro cable ties for the index finger-loop and order some generic wrist straps from aliexpress: https://www.aliexpress.com/wholesale?SearchText=wrist+strap+for+phone. The idea of the product is that, by holding it while running, it will improve your posture and performance.