Gee you got a lot of great advice here, and I'm going to take it too!
What better time to start this than Lent? And as for taking responsibility for your health: are you on the company's health insurance policy? If so, you're taking steps to lower their costs, leaving more money in the budget (we hope!!!) for salaries. The company I work for is suddenly very focused on this after the costs to insure the health of the employees DOUBLED in one year.

Someone will soon appreciate your contribution, but maybe not that "office wife" type who gave you static. I can just picture her - does she still have big hair that's mostly spray like I had in the 80's, and you just know she wraps it all up in toilet paper at night, and doesn't engage in anything vigorous because it might mess up her hair? Poor thing She needs a bike.