Doesn't that just increase resistance to your walking, thus is equivalent to you converting calories to battery energy? Wind and solar would be additional energy over what you brought as stored calories or food.
You're not gonna power a heater or aircon through body movement, but devices should be fine.
1. https://www.reddit.com/r/theydidthemath/comments/693daq/comm...
A Calorie is slightly more than a watt hour.