Yup, I'm 54 and have been riding/training/racing/commuting fixed almost exclusively since 2004. I believe I will pretty much continue that through my grandpa years. I put in between 5-6k/yr and do all my Centuries and 200k Brevets fixed. I live in Chicago albeit those longer rides (Wisconsin/Michigan) can be very hilly at times. I run a big gear (54x16) when I train but that works for me. Huge fan. For those looking for a change or looking for ways to get stronger/faster on a bike, this is one of the answers for sure. Give it a shot.