many thanks for the concern, and reasoned advice...I am hearing the same from the physiotherapist and the local friends....go slow and make the moments count...easier said than done though, as the innate enthusiasm always wants to push to the fore...the path is still a bit daunting, as here at a temple you first climb, then descend to the interior tomb of Pakal, then re-climb the steep and wet inside stone steps, and finally descend the exterior staircase anew...well worth the effort, yet taxing all the same