i have a very tone body. I love physical fitness to improve my well being and health. 
That is good the better shape you stay in the better you will feel as you age
Yes I agree. I achieve it through proper nutrition and exercise as well as good rest is important.
Sounds like you really know what you are doing
I know a little. Before the industrial revolution people thought of fitness as your ability to do your daily activities without getting tired. 
Really? At my age fitness is being able to exercise without getting hurt lol I like to swim its low impact
Swimming is a great exercise. You can say fitness is just a quality or state of being. However you achieve it is up to your interests.