The tibialis bar is a progression for the anterior tibialis exercise, used when exact measurable load is desired for advanced athletes.

“the tibialis bar is then as you get more advanced and you want some degree of exact measurable load right the strongest bench pressures in the world they didn't get there off doing band drills maybe they added some dandruff but they they know how much weight they're lifting so now if you want to make like a world-class athlete you progress from the wall then to this bar that you know exactly how much you're lifting and you measurably increase your strength the same proven ways that anyone would increase their strength”