Back in the day – every time I did a plank – I would hold it for 5 minutes. I was always shocked at the lack of core benefit I felt. Once I learned how to FLEX LIKE A MOTHER, a 20 SECOND plank sets my core on FIRE! A ‘plank’ without a STRONG PELVIC TILT and maximum GLUTE FLEX throughout the ENTIRE HOLD is basically a shoulder move and dangerous to the spine without PERFECT alignment. Challenge yourself and learn that ‘time’ has ZERO to do with maximizing a plank.