Don't crash.
Like others, I played lots of sports: football, track, baseball, ice hockey, skiing, and of course bicycle racing. I practiced how to crash as recommended in Eddie B's book. Into my 60's, I wouldn't practice tucking and rolling even on grass.
Going over the bars is easy, tuck and roll.
Crashing to the side into something immovable? You will break old bones. All those years crashing into the boards at 25 mph and I never broke anything playing hockey all the way thru college but then in an adult league, an opposing player tripped me on a breakaway. I crashed into the goal cross bar and broke ribs for the first time at 35 years old. I broke them again in roller skating race when the lead racer went down and I jumped and rolled just like Eddie B said, but the boards did not cooperate nor did my ribs. I broke them two more times doing stupid stuff and broke five of them in a bicycling crash last September.
Don't crash, fellow old men