I am just curious about whether or not anyone else worries about this. I am still doing sprints so the # hours of cardio I do is less than someone who is training for an IM, but sometimes I worry that if I start preparing for an IM it will up the hours of cardio I am doing and I will lose more weight. I don't really think I have to worry right now because I estimate that I still have 13lbs of body fat left whereas I think female pros have around 7-10lbs. I have also heard that a lot of cardio burns muscle. I don't know if that is a myth or not.
Does anyone else have these concerns? If so, how do you deal with them? Thanks.