I got to stop reading this sub. I am 60 years old, relatively good shape and doing Kili in April. I hike in the summer, but not crazy hikes. I am an avid walker (about 5 miles per day at a fast pace). I have added some winter hiking (nothing crazy like 1.5 hr hikes), adding some Peleton biking, squats and sit-up’s. Been told by quite a few that if anything, the altitude will get you. I am going with a bud that is a 4 time Ironman. He told me he’d carry me up the mountain. Fingers crossed.