Physical fitness is a state of health and well-being and, more specifically, the ability to perform aspects of sports, 
Do I need to do a lot of strenuous exercise to be physically fit?
Physical fitness is generally achieved through proper nutrition, moderate-vigorous physical exercise coupled with sufficient rest
I like to walk my dog and bowl. Will that make me fit?
Are you describing the Puppy Bowl is an annual television program on Animal Planet that mimics an American football bowl ?
That was funny. But no, I am talking about walking my do 20 minutes a day.
Well ,that's more like a dog walker..Lol! Thats part of fun exercised
Maybe I can walk my doggie twice a day.  Would that be a better way to get fit?
Sure ,that's if it you have the capacity to carry out the day’s activities without undue fatigue.