Every day, or as often as needs to be done.
Figure out the schedule. Perhaps it's once a week.
It's not about extremes. It's not about doing a magnanimous or extraordinary thing on one singular day, or in one moment.
It's the accumulation of micro-actions.
It's about consistency.
It's about showing up, even when things aren't perfect, even when you're not sure, even when you're scared.
It's doing something, even a little bit at a time. Maybe a 10-minute walk during lunch, or a 30-minute light walk, rather than a run. But you're doing it. You're doing something, not nothing.