A Blockchain running app which rewards training?

Come on developers. There is a really great opportunity out there for somebody to build on top of a blockchain, an app which rewards users in coins for running. It could be mining cryptocurrency like Monero or Fantomcoin in the background whilst you run, using your CPU power, and obviously the further you go the more rewards you can earn. Not only running though. You could start off by uploading your photo and body mass index. Those who are fatter and more unfit get potentially bigger rewards to start with to encourage them to exercise, making themselves richer and more healthy in the process. Everyone's a winner! This would also help with the ongoing obesity crisis in countries like the US and the UK. We have to find ways to reduce the stress on the National Health System (NHS) . Motivation and education is the key to a healthier and more sustainable quality of life, and I feel offering rewards that genuinely pay out, would get people making an effort. You shouldn't have to do it - the person should want to become fitter and healthier but unfortunately we are dealing in real life here. We have to find solutions to get people out exercising and enjoying outdoor life. I'd love to hear your thoughts on this, so please leave a comment below if you think it could work. Thank you.