I have vicarious knowledge about what it takes to do endurance events. My son is a professional triathlete who has completed 3 Ironmans and currently races 1/2 Ironman distance. My hat is off to you. Be proud of what you have achieved.

As an aside, I'm into long walks and find it funny that when I'm sitting by the trail contemplating my feet with my boots off, others will come by and say, "Blisters? Here, try one of my pills. It will help the pain."