Maybe your natural “exercising window” is during working hours.

I am overweight and sedentary, but around 10:30am, after 90 minutes of work, at my sharpest moment of the day, I often get the desire to just take a break and get some fresh air for an hour. Thank heavens I work at home and with no boss, or I would miss that little walking session, as it’s usually the busiest, most productive time window of the whole day in a regular office.