Joe Datsko was an admitted workaholic for the first 25 years of a 47-year career as a mechanical engineering professor at the University of Michigan. Datsko likes to say that until he was in his early 50s "most of my exercise was writing on a blackboard."
That changed in the early 1970s when the younger of Datsko's two sons — he also has three daughters — was invited to the 1972 U.S. Olympic trials in cycling. Robert Datsko, who was in high school at the time, failed to secure one of the 12 spots, finishing in the top third of the 66-person field.
But something happened to change Joe Datsko's life.
"We became a bicycling family," Datsko, 92,...