Hey RR,
As an aside, what really impressed me was their teacher. He was 74 fricken years old, and he rolled quasi-steady for 60 min., and was pretty dang fiesty the whole time, going for Jujigatame, Udegarami, and other typical JJJ holds.
In the Jiu Jistu type world this guy is the odd ball. Most are physically damaged and have pain regulary. Probally he was in better shape because he did not have much grappling time in as grappling is brutal on your body.
If I can still go like that at 74, I will be incredibly happy.
Well, my friend! Then you will need a lot of Yoga and sports therapy to counter the effect it has on your body. In the time you have been involved with grappling how many injuries have you had??
Everyone gets injured grappling! Its part of it. If someone has not been injured grappling then they have never grappled! I only did it for a little while but in that time period I twisted my ankle twice, pulled a back muscle, injured a rib and not to mention the lovely feeling of the Swollen (Col. Flow Ears)! Oh are they are the best! Even a pillow made me cry when the ears touched it!
I wish that on nobody!
Most honest reality guys will tell you for the street all you need is a year or so with ground stuff. For those times when you end up there or have no choice. If you want to be a competitive grappler then thats a different story.
Have a good one!