50 steps for a 20% lower risk is a surprising and important result. It's less time/effort than people expect for that amount of benefit. Lots of people assume

50 steps for a 20% lower risk is a surprising and important result. It's less time/effort than people expect for that amount of benefit. Lots of people assume they can't exercise enough for it to matter and then decide not to exercise at all. This result could help change their minds.