There's a huge difference between supporting a sport and playing it. With more sports streaming than ever available, how many of us actually go out and watch sport, let alone participate.
Personally, I love football (I'm English) to watch, but cycling is my sport of choice.
Tour de France is on so I'm in heaven and I cycle more than playing any other sport.
Cyclists are the fittest athletes. They have to be. 3 weeks and over 4000kms (for TdF) is inspirational. Endurance and fitness.
For complete fitness then swimming is both cardio-vascular and full body, but boring to watch.
In Australia (well Victoria), footie is huge (AFL) and attracts huge attendances, but is unique to the region.
What sports do you watch AND play?