Small physical habits accumulate before visible consequences volunteer an explanation.

Physical habits work below the threshold of visibility for a long time. Nothing seems to be happening, no consequence presents itself, and then at some point the accumulated effect appears all at once and looks sudden. It was not sudden. It was a long quiet process that only became legible at the end.

Given that lag, judge your habits by their direction rather than by current evidence. Ask where this pattern leads if you continue it for ten years. That question is available now, and the visible answer is not.