There should be no effort at contact. The problem with Blast and other metrics is that everyone tries to beat the numbers by exerting effort at contact. If you get the stretches, resistances and postures correct a simple snap of the handle takes you contact without EFFORT.
One guys is big and strong and is all effort. The other guy is big and strong and knows how to leverage the stretches.
One pushes his rear leg the other lets his rear leg pull his barrel around
Right, you don’t just try to get batspeed to go up, that can result in some very long and muscled up swings.