For most and especially seniors walking is the best exercise, a slight variation on this one.
Pick an exercise you like...if you don’t, you won’t stick with it.....trust me.
walking is not best, plenty of people walk too much, create tightness, to the point of tears, causing foot problems ankles, knees, hips. this 10K step thing is likely orchestrated by Orthopedics to get more business. People need variety of exercise or body usage to be healthfully fit.