Chances are you’ve never been riding your bike in the middle of the day and suddenly thought, “Gee, I could really use a quick blood test.” So why is someone designing a bike to do just that? The Spokefuge was created to help health workers living in developing countries test blood samples while riding from location to location. It’s an innovation that could make a big difference in the lives of people who suffer from blood diseases, like anemia.

The low-cost centrifuge attaches to the bike. The motion of the ride spins the blood around, separating the liquid from the solid cells. The health worker riding the bike can then check the blood when the ride is finished.

Like we said, we see this being super applicable to health workers who get around by bike in developing countries, or countries hit by natural disasters. Rather than traveling back and forth between a hospital each time, blood tests can be run quickly and efficiently on the bike. How’s that for energy-optimization?

What do you think of this centrifuge bike? Let us know your thoughts in the comments below!

(h/t Fast Company)