I would gather “dynamic EMS” is when your applying physical movement when performing an exercise (conventional squats) for example.
“Static EMS” is more of an isometric hold, a static exercise, performing (planks) for example. I think I’m correct in saying iso abs knock spots of dynamic ab exercises.
He’s stating that applying movement (dynamic) during an exercise results in greater EMS activity than a static/isometric held exercise.
Although…
I’m lead to believe, For a given load an isometric contraction recruits more motor units then either an eccentric or concentric action.
Isometrics deserve more attention IMO (tendons). Tendons are where it’s at, iso’s work the tendons like no other. For many on this board its all about just working the muscles, putting on the mass, which ‘plausibly’ can slow that ass right down. Ben was only 173lbs.
Tendon Properties.
The dynamic nature of tendons are determined by their elastic behavior. They contain collagen which has the ability to return 93% of the energy it stores. In other words only 7% of the energy put in is lost as heat and not returned as mechanical work. Tendons change length in proportion to their applied load. This ability of tendons is known as compliance. In other words they can be stretched easily, but it must be added that muscle structures are also compliant. Tendons produce energy when they recoil from a stretched state. A tendon that requires larger forces to stretch it before it recoils is known as a stiff tendon.