When I started working out at a gym, when I was in my early fifties, I barely knew that bodybuilding existed. But the gym I happened to join in Tokyo turned out to be popular with amateur bodybuilders, and I exercised near them most evenings for more than ten years. I became acquainted with quite a few of them, including some of the top bodybuilders in Japan, and made friends with several, but I never really understood what drove them. Although most of them had full-time jobs, they worked out nearly every evening for a couple of hours, and when the summer competition season approached they would drastically restrict their diets and start spending money on skincare and tanning. It looked to me like self-torture, but many of them continued this year after year.
In my job, in foreign-language education, I think a lot about what motivates some adults to keep studying long and hard enough to become proficient in a foreign language, as relatively few actually succeed. I tried to get some insights about motivation from watching and talking to the bodybuilders, but I didn’t really learn much. This article helped.