The medical definition of atrophy can be described as the wasting away of a muscle, due to non use or the loss of nerve supply. Some of us believe this can happen to muscle cars, as well as muscles in the human body. Here’s a few examples of muscle cars that most likely didn’t live on to suffer the atrophy inducing mediocrity of car shows, cruise nights, televised auctions, or languishing under a car cover in some collector’s climate controlled garage. The off-road muscle warriors shown here soldiered through the ranks of SCORE Class 6, the Baja 500 and 1000, and various other off-road races during the 1970s and 80s, living the most likely short but extreme life that a muscle car should.