Is Daily Physical Activity good for longevity?

Yes — the evidence for this is strong. Large prospective cohort studies, including a Taiwanese study of over 400,000 people and a pooled analysis of more than a million participants, consistently show that non-exercise daily movement is inversely related to mortality, even at volumes well below formal exercise guidelines. That's reflected in an evidence score of 84/100 for its role in longevity, drawn from 6 studies, with an estimated impact on longevity rated substantial (92/100).