During and a After sex question

Kaitlynn

This might be a stupid question but starting off with this: I had sex today in my Fiance's house and during sex my legs started feeling numb and was kinda hard to move when it was my turn of the action. My fiance thinks I'm out of shape but not fat. Personally, both he and I are fat (F: 200+lbs and me:180+lbs) Is it normal? I think it's because I'm out of shape (and rarely exercise because of school) or could be my diabetes meditation.