Does shadow boxing with weights make you faster?

[Zab Super Judah]

I've heard many people say it doesn't do anything to make you faster and also heard that it does. Anyone got any ideaS? here is a picture of oscar using weights

on a side note floyd mayweather SR looks to be in better shape then oscar haha

[Verstyle]

in my opinion it makes u slower cause your building muscle as u punch

[Gattz187]

it temporaliy does but in the long run no it doesnt. as mystikal said it would add unnesscary muscles

[BrooklynBomber]

Not good. Hurts your joints timing, besides adding some unnescesary white muscles. (you need red or fast-twitch muscle tissues for speed and punch)