He might have lived if he listened to his body more. He was getting ready for a photo shoot, and was on the treadmill for extended periods. One day his chest started to hurt, he got off the treadmill, rested a little, then jumped right back on. Whammo, massive heart attack.
I enjoyed his writing. He had a hand in training Christoper Reeve for the Superman film, which shifted him from training full body to mainly working back, arms, and shoulders with little to no chest and trap work. He did that to try and get him an exaggerated V taper in a short amount of time.