First advice is....if you've started, don't stop! Ok. Be prepared to change your cycling regime.....add more rest...even slow down a little but the good news is that with age comes endurance....really. A touch of the hare and the tortoise comes into play...just a touch mind.
Good thread!
In the UK number of people cycling declines after 60. What would you suggest we do to keep older folk cycling or encourage them to take up cycling?