I've read countless times that you can start BJJ (and indeed most other sports) with a very basic fitness level, as you'll gain strength and stamina quickly once you start training regularly.
However I just don't believe you can get the best out of your training, and progress at a good pace, if you have to build up your fitness at the same time as learning new techniques.
So, just how fit do you have to be, in terms of strength and stamina, for your fitness not to be slowing down your progress?
I am reasonably fit I think, not overweight other than a slight beer belly, ok strength for my size (5'8 and 73k), and my weak point is definitely stamina and keeping physical pace for any amount of time. I'm wondering if I should aim to improve my fitness level before I start BJJ, rather than after...
Any thoughts or advice welcome!