Ten minute static front plank? Video or it didn't happen. I've heard if you can do 3min front and 3 min each side (on elbows) without rest or movement, you'll never have back problems. I believe it, but I've never met or seen anybody capable.
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.