I'm not knocking tennis, it can be a great form of exercise. But the real pro tip here is just exercise, or five the activity that gives you this kind of passion towards exercise.

To play tennis you need to be able to purchase equipment, and based on your suggestions lessons which are another expense, you need access to a court, and another person every time you want to play. That's a lot of factors that many can't meet, let alone constantly. Then of course there's the physical capabilities necessary to play. Tennis puts a lot of stress on joints, wrists, elbows, and knees.

I know this comes across as a really negative response, it is I suppose, but not meant to be in an aggressive tone. I appreciate the enthusiasm towards tennis, that's the biggest takeaway people need from this. Finding that enthusiasm towards an activity that creates a love of exercise for themselves.