For sore knees and ankles, do a backwards walking, then a sled pulled backwards with weight for a few weeks, 10 minutes a day 3x/week. Doesn't need to be expens

For sore knees and ankles, do a backwards walking, then a sled pulled backwards with weight for a few weeks, 10 minutes a day 3x/week. Doesn't need to be expensive, can drag anything to get the effect. See kneesovertoesguy for more.