This is “HOW TO BUILD MEGA MASS,” a previously-owned video-cassette tape (VHS) in its original cardboard slipcase. Issued by Weider Communications / Brentwood Home Video in 1991, this tape (from Weider's legendary training system series) reveals the secrets and techniques behind building real mass and power in the bodybuilding lifestyle. Joe Weider is the Canadian co-founder of the International Federation of BodyBuilders (IFBB) and creator of the Mr. Olympia, Ms. Olympia and the now defunct Masters Olympia bodybuilding contests. Weider also published the first issue of “Muscle & Fitness” (then called “Your Physique”) and was one of the first to incorporate nutrition into bodybuilding. In addition, he helped bring a young Arnold Schwarzenegger to America to train…