I don't think he was admiring me. He was commenting on my size and it being abnormal. He almost spun it in a negative way.
I told him I used to be overweight and since I lost weight, I wanted to continue my healthy lifestyle. He then proceeded to tell me that there is a big difference between being healthy and having an obsession with weight lifting. I'm fairly certain the interviewer looked at it negatively but the others might have been in admiration?