I am 51. Last year after my 50th birthday, I bought a mountain bike to ride trails after not riding a bike once since I was probably 15-16 years old. Rode a course nearby twice. Wiped out okay the first time and then horribly the second (stitches and huge scars on leg and arm). Sold mountain bike the following week to a 13 year old. Told him, "You're more suited to this than me."
Was easier to explain to my wife than a too expensive Corvette and Vegas hooker mishap though.