Workout your stomach while you are at your desk job.
To flatten you belly, you can work out the transversus abdominis. https://bernstein-burke.hubstack.net/losing-weight-is-not-always-easy-as-you-age-you-might-find-shedding-pounds-to-be-quite-challenging-indeed-this-is-why-you-need-to-use-the-tips-here-to-help-you-get-into-a-lif-1720100866