I started a new job in late November 2018 and have been walking 1.6 km (1 mi) a day since then.

See how the trend line on this weight loss curve (in kilograms) gets steeper around day 245? That's when I started the new job. Apparently, that minimal level of exercise is actually making a difference.

Working out never made a dent in my weight before I had the surgery. My problems were just too severe to fix with diet and exercise. I would've had to put in an inhuman effort on both fronts, and it was just more than I could manage.