Does player condition directly effect performance??

If a player has 70% condition for example, what effects will that have on that player as opposed to being fitter???

In reality it will make them slower in both movement and reaction, as well as not perform as good as normal as increase likeliness of injuries

I presume (but don't know with certainty) that FM would be programmed to have the same effects, after all, if it didn't then condition would have no use, other than a morale aspect when players are "In need of a Rest"

Thanks

Can anyone back this up??