
Many thanks for your replies.
He is beginning to run again, but for a while yet to be restricted to increasing distance, encourage jogging & the odd moment of exuberance! Stairs are a no no, and I've never been keen for them to run down hills, with a large prominent chest & short legs, momentum tends to take over. He has done stairs in the past - supervised - spent almost a year upstairs with OH - but although he is not wrapped in cotton wool think after a spell of paralysis and now this he can restrict himself to the ground floor.
I'm sure there must be a few of his kind out there able to trot alongside a bicycle but he's not one of them, endurance yes but not speed. So will be encouraging him up a few more hills and heading for the beach. He's back at the chiropractor next week and will ask for some exercises for us.
He is allowed to enjoy himself and has been kept trim & fit but I will be curtailing some avoidable risks, slipway to the beach rather than steep steps, no more wheelies around the pond and sadly refereeing play with his cousin. Hopefully with cooler months ahead and a time of year he gets out of first gear, we will manage to make up the loss of condition to his back end. Thank you & fingers crossed.