From a very outdoor woman here who is always fell walking, cycling, gardening, skiing, etc to say yes I have done cruising and been a completely different experience from our usual active holidays. On the first one I felt like going Baa baa and following a load of sheep but after a bit really enjoyed the wonderful food, always did our own trips (way too expensive from the cruise liner, huge rip off) saw some very interesting places and even enjoyed the days at sea with some good reading, knitting, puzzles, scrabble etc. But you are only in ports for such a limited time and off again so you have to be quick to take in what you want to see. But having recovered from surgery it has been a super holiday to chill and relax on.