If you want burn calories use Digitsole smart insoles
Digitsole smart insoles
How would you like to get your hands on a rechargeable insole
that can be used to heat your feet and track your steps? You can
link up to Digitsole via Bluetooth and use an Android or iOS app
to adjust the temperature of your feet (separately if necessary). The
insoles will also track your steps and tell you how many calories
you’ve burned. This first caught our eye last year when there was a
successful Kickstarter campaign that brought in more than double
the $40k of funding it requested. Clearly a lot of people think it’s a
genius idea, but at $200 a pair we’re not so sure.