Jim Smith aka Smitty posted a guest blog over on Ask Joe on DeFranco's Training about a plank variation. It's very detailed as to why to use it and how to use it. Short version? Actively-band resisted planks on a glute-ham raise!
Here it is:
Real "Core Strength" for Athletes
Very cool! I hope I get to try it soon...
【2次締切迫る】5/21 JBJJF 第8回中国柔術選手権 | 岡山武道館
1 hour ago