I started with 1 min and worked my way upto 10 min. Elbows. It was TOUGH in the beginning. My WHOLE core ( abs , back side) area was sore, but then i just got u

I started with 1 min and worked my way upto 10 min. Elbows. It was TOUGH in the beginning. My WHOLE core ( abs , back side) area was sore, but then i just got used to it. Sometimes i'll add a weighted vest. You can do it. WR is 8 hours and change.