[header] How to earn money working out [title] Use fitcoin to earn bitcoins by working out. [step] The fitcoin mobile app is synchronized with fitness trackers. Your fitness tracker will send your exercise data such as heart rate and duration of activity to the fitcoin app. 
The fitcoin app converts this exercise data into a number for the total energy you spent exercising, which is then converted into the bitcoin currency. [substeps] You can spend your bitcoins at online retailers that accept this currency.