All runners have chaffing and blisters at some point. I’ve had chaffing because of hot weather, an ill fitting sports bra, and from shorts that rub the wrong way. Blisters are usually kept to my feet. Yesterday at the gym I used a recumbent bike and a rowing machine and somehow ended up with a blister on my rear end. I don’t know which machine is the culprit (although I’m leaning toward the rowing machine because I did it second). Until now, chaffing and blisters bothered me, but did not affect my daily movement. Well, if you have a blister on your rear it hurts to sit, move around, and when you take a shower literally feels like you are being branded.