Is knitting making me fat?

Since I started knitting 7 months ago I have gained 10 pounds? Yikes. I keep telling myself to go for a walk or do a tape ..Maybe it is because I am retired too. But, husband claims I am sitting too much? would think knitting would help me lose weight because it keeps my hands busy from snacking. Nothing fits): winter coming and it will only get worse.so depressing. Sitting at this computer so much does not help either, I guess?