I did a 30 min HIIT (high intensity interval training) ...this was a hill climbing exercise. Do a 5 min warm up walk on flat land, and walk to the base of a hill...power walk/jog/run up the hill for 60 seconds, (whatever pace you need to really work hard) then turn around and stroll/light jog your way back down the hill to recover. When you get to the bottom, turn around and go as fast as you can back up the hill, and so on. Do this as many times as you can in about 15 min. Then do a moderate pace back on flat land for 5 min, followed by a 5 min walk to cool down.

I spent about 90 minutes doing fall cleanup outside, since it was a warm and sunny afternoon. And then in the evening played three hours of competitive volleyball.

run/walk 8.56 miles. Not quite 20k steps.....but close.