I can now attest that the experience of grappling with an expert is akin to falling into deep water without knowing how to swim. You will make a furious effort to stay afloat—and you will fail. Once you learn how to swim, however, it becomes difficult to see what the problem is—why can’t a drowning man just relax and tread water? The same inscrutable difference between lethal ignorance and lifesaving knowledge can be found on the mat: To train in BJJ is to continually drown—or, rather, to be drowned, in sudden and ingenious ways—and to be taught, again and again, how to swim.
Developing this kind of flexibility doesn’t happen overnight. Just like technique in jiu-jitsu, flexibility in yoga takes a lot of focus and hard work. But once you develop this, you will feel the gradual improvement in your jiu-jitsu game. Not only will you be able to resist submissions a lot more easily, you will feel your mobility improve. You will become more agile because along with this flexibility, you will also develop strength - a type of yoga-specific strength that will help every facet of your game.
The good thing about the Prowler is that it WORKS. If you have bad knees and can no longer stress them with any kind of running, walking with the Prowler will fit your needs. Hell, walking with the Prowler is harder than running. Remember the first couple workouts will suck the life out of you, but you will quickly get better. No one wants to go through life sucking wind and no one wants to go through life sucking at all.
The concept of self-actualization is ironic, because it can never truly be reached. The weak man gives up. The stupid man thinks he has achieved it. The wise and strong man never stops his pursuit.