This is Latin for, "To each his own," or, "May all get their due." It was made famous by Roman author Marcus Tullius Cicero and stems from the Greek principle of justice, and that everyone should serve society per his or her own abilities.
The most popular definition of the phrase on Urban Dictionary is: Statement said when someone does not agree with your opinion. Meaning that even though they don't like it you do.
What if you were to apply this to your pursuit for life-enhancing physical activity? Different from societal attitudes towards "exercise," the type of physical activity I am referring to is something that would bring you joy. And for each of us that will be different. Just because I don't enjoy weight lifting doesn't mean that it doesn't make you feel good. Or maybe you dig rollerblading or 80's style workout videos. I tend to steer clients towards things that are a little wacky just to spark their creativity. Exercise need not happen in a gym (unless that's what you enjoy!).
The point is, find something you enjoy, regardless of what others think. Suum cuique!