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.
What is the average pitch speed for mens fast pitch softball? 110 mph? No, probably not.     Most of the top men's pitchers throw in the 80's. There have been some studies done, though, showing that a 85 mph fastpitch is like a â¦100 mph baseball pitch in terms of reaction time the hitter has.     Remember in baseball, the pitcher is 60' 6 from home plate.