When i was in University. I realize that my professors and other teachers are telling Physical Activity instead of Sport in any subject (for example : how to burn fats, what should people do for being healthy or stay healthy even if they are really old.) So it makes me wonder why they are telling physical activity ? Because we were always saying "Sport" when we play or talking about anything we do on streets or clubs. So i started to search by asking my professors what is difference between "Sport" and "Physical Activity". And i get this conclusion at the end.
When people are going to the gym or playing (Basketball, Football, Soccer , Tennis etc.) with their friends. People are thinking they are doing sport. But they are not. It is a mistake to think that they are doing Sport. When sedantary people doing something for their health or enjoy , it's called Physical Activity. If you start gaining profit from it , then it will become a Sport. So, you are just doing physical activity until you make profit from it
People who is around me , always asking does it really important to say Physical Activity instead of saying Sport ? Ofcourse it is not important for sedantary people who is doing it for stay healthy or fun. But it does for people who is doing Sport as a fulltime job. Because they are earning money from sport and they deserve some respect in my opinion.
I hope it helps to you to understand difference between doing Sport and Physical Activity.
Thank you for sparing your time to read the post.