[AnnieK]

To lose weight just walking you have to put yourself in a calorie deficit. So you have to burn more calories than you consume. Walking 10000 steps burns around 500 calories ish. You burn around 1500 calories just by living so if you stick to around 1500 calories from food you would lose weight from just walking.....very slowly but you would.

Tldr: no you can't eat pizza dn McDonald's and lose weight just by making sure you get 10000 steps in