I'm about to be 36 and I feel great mentally and physically, a few nagging sports injuries give me an occasional 1/10 on the pain scale but it's nothing to complain about. I personally know a few triathletes and OCR competitors in their 70s(!!) who complain less about the pangs of age than pic related. Take care of your body and it'll take care of you. And yeah, I can't imagine living my 20s in this fashion. I can't really be too preachy since I spent ages 15-23 or so trashing myself with drugs, smoking, and excessive drink but at least I had a hell of a good time. This pig spent its youth inhaling cheeseburgers and posting on reddit. What a pathetic waste of youth, and of life at any age.