I try to bike to work (been difficult this past week with distant mid-day obligations) and it's only about 3.5 miles each way. Over lunch I lift weights at the gym nearby and usually go for a ride/run with my dog after work. Since I started for this season about a month ago, I have lost zero weight at all. My opinion is that none of this really matters. As long as you feel healthy and your ass can fit comfortably in an airplane, I don't think you have anything to worry about. If you can drop the membership, do it. I like lifting a lot, but if I didn't, you couldn't find me anywhere near a gym. As some people have said, you don't need weights to get a good, well rounded workout. There some great programs around that require little to no equipment to do. Additionally there are a lot of more fun ways to work out. Unless you actually enjoy the gym (like me) then do something that makes you happy like basketball, climbing, ultimate frisbee or anything at all. Life is way too short to worry about tight jeans.