Whether you’re working on a laptop, taking conference calls, or just finding it hard to watch all of those TV shows you’ve queued up, it’s often easy to find yourself sitting for multiple hours a day. WeBike has found a way to convert physical activity into useful electric energy. This bicycle-desk requires you to pedal in order to power your workstation laptops, cellphones, and other devices.

Designed by Belgian company WeWatt, the bike instantly tracks how much power has been generated through physical activity with an LED strip that lights up as you pedal. WeBikes are even partially made of recycled materials like leather and cedar. Doesn’t get much more sustainable than that!