Pope Francis acknowledged on Saturday that he was no longer in the condition to travel like he used to, saying his trip to Canada was “a bit of a test” that shows he needs to slow down and one day possibly retire, according to the Associated Press.

Given his long history of knee pain, the head of the Roman Catholic Church drew concerned questions about his health and the future of his pontificate following his use of a wheelchair, walker and cane to get around this week – the first trip he has needed assistance to get around.

The typically congenial and active pope found his program and ability to mingle with crowds “sharply” limited, reports AP.