Medical Definition of Z LINE. : any of the dark bands across a striated muscle fiber that mark the junction of actin filaments in adjacent sarcomeres.Britannica.com: Encyclopedia article about Z line.efinition of Z LINE. : any of the dark thin bands across a striated muscle fiber that mark the junction of actin filaments in adjacent sarcomeres. ADVERTISEMENT.
The average fb speed in the MLB is 91-92ish. Catchers compete with this when trying to throw down a runner at 90ish. The average throw speed from third base is 80 MPH. As for the rest of the positions I am not sure of the exact average, but it is not as fast or faster than pitch speed.
Hitting a baseball hundreds of feet is incredibly hard. Accurately measuring those moonshots isn't much easier. After Giancarlo Stanton decimated a baseball during the World Baseball Classic, MLB Network informed viewers that the hulking outfielder torpedoed the ball 424 feet at an exit velocity of 117.3 miles per hour.