well, we're hooked on these things now. We are signed up for Gladiator Run in June, another Tough Mudder (Tahoe) in July, and Spartan Beast in August. Might to Warrior Dash Nor Cal in October, but that will depend on my paintball schedule.
The physical change has been incredible....I went from being 40 lb overweight and couldnt run more than 100 yards without collapsing in a sweaty heap to a lean athlete who now runs 25-20 miles a week. At 42 years old, I think this is pretty darn good!
I feel ALOT better these days, physically & mentally.