I heard that the reason behind the popular 10k step number was the first step counter on the market which was limited to 9999 steps, and people saw that as a ch

I heard that the reason behind the popular 10k step number was the first step counter on the market which was limited to 9999 steps, and people saw that as a challenge to reach. Meanwhile this is more like the 5th study I've heard of which talks about some measure of exercise at least 1-2 times a week, like 20+ minutes of cycling.