Well, this was a long time coming. My article, “Critical Mass: Oral History, Innovation Theory, and the Fitness Legacy of the Muscle Beach Scene,” was just published by the International Journal of the History of Sport. This paper began its life as part of my dissertation, which was submitted in 2014. I’d wager the initial research began in 2011 or so, so this is a sporadic decade’s work. I think it’s pretty good. 50 free copies via this link, but email me if you miss out on one of those and need a copy.