If you're not interested, why force yourself? It's okay to let things go that no longer give you the joy they once did. Maybe a break will rekindle that spark, but maybe it won't!
Things that might motivate you might be at different ends of the spectrum like fulfillment vs fear.
When experiencing the sea, riding the waves would be the thing you would want to be comfortable with, and you could just drift with no problem.
OTOH an attractive shore or perhaps sharks closing in from the deep could be what it takes to motivate anybody, to head in about the same direction either way.
It's not usually that extreme, but it's a thing.
Maybe revisit some physical activity that both reduces worry and provides joy at the same time, which could lead you in a direction where you really look forward to continue moving that way more.