There are two type’s of people that say they exercise every day. The first is someone that wakes up every morning and does 100 push-ups or a 100 sit-ups or something like that, I have never met anyone like this in real life I have only seen them in movies, I’m not saying they don’t exist, I’m just saying I’ve never met them in real life. However they would be able to strength train like this for one of two reasons, one they either rotate between exercises everyday like do push-ups one day, pull-ups another day and sit-ups the next day.