After mentioning the physical issues you have when you exercise, it was quite hard to tell you were being sarcastic.
Never succumb to the temptation of adding `/s`
Those who depend on it to see sarcasm need to either lighten up or read more novels. Was clearly sarcastic; you're not crazy.
I guess so, him and many others including I.
Dunno it was obvious to me that s/he meant it in a half ironic jokey way as in "I don't like exercise and I say this to justify the dislike but I know that it's not really true".