Watching the lad try to sit up in bed each morning and then take 5-10mins doing laps of our room steadily stretching off and easing himself into being able to walk gives you an idea of how scrapped John was in Sopot, felt sorry for the bloke and he was dropping Ibuprofen all afternoon hence an improved mobility and performance in the open class.
When he had no shirt on you could also see that he'd visibly lost a very significant amount of muscle mass from his back (which is ordinarily like a Sea Turtle with an addiction to training its Lats !)
Cheers
Nez