When did getting up off the floor become such a freaking problem?

[AverageOldGuy]

28. I'm 81

Old soldier, ran marathons for 20 years, moderate workout 5 days a week.

Getting up off the floor is the most difficult thing I do. In fact, I returned this afternoon from grocery shopping. Had to kneel on the kitchen floor to put groceries in fridge, real struggle to get up — walk on my knees to the kitchen island and pull up on the counter.