40 miles a week isn't much if your goal is to lose weight. It's fine if you're just trying to get the health benefits of exercise however. I didn't lose any weight for a year riding 50-60 miles per week progressing up to 100 miles per week at the end of the year. Somewhere north of 100 miles per week is where I started losing weight. Also, be patient, 2 1/2 months is nothing if you're in this for the long haul.