Ok, this is frustrating!

I stopped bicycling to work about a month or so ago because its too cold in the mornings. Now my pants are getting pretty tight around the waist and my shirts have a little less room in them. The frustrating part is im still basically the same weight. Whats happened is Ive lost the muscle mass in my legs and have replaced it with fat around my gut! The treadmill isnt cutting it as far as the exercise i would get by biking. I refuse to put on a larger pair of pants. Wearing the tight ones are a reminder to me that things arent going so well at this point in time and not to give up on my new habits.