I have done the 10,000 steps challenge before.
I find that walking during my lunchbreak helps.
Most lunchtimes I aim to catch a tram to a Buddhist centre in town, grab 30 mins of meditation, and then walk back, often trying to follow the instructions to Bahiya as I walk...
In reference to the seen, there will be only the seen. In reference to the heard, only the heard. In reference to the sensed, only the sensed. In reference to the cognized, only the cognized. That is how you should train yourself. When for you there will be only the seen in reference to the seen, only the heard in reference to the heard, only the sensed in reference to the sensed, only the cognized in reference to the cognized, then, Bahiya, there is no you in terms of that. When there is no you in terms of that, there is no you there. When there is no you there, you are neither here nor yonder nor between the two. This, just this, is the end of stress.
I find that on weekdays that if I don't walk at lunchtime, I'll barely walk at all.
On weekends I do a fair bit of walking even if it's just pottering around the house.
Be sure to have your pedometer correctly calibrated lest you get cheated of hard earned steps!