What are your experiences with CD? Is it preferable to have one with high pace/ acceleration but low in heading/ jumping reach?

It seems the tactic is very draining on wingers. Do you have any suggestion for managing wingers because they seem to consistently overexert themselves and get injured.

I use your schedule but it seems that every player is complaining about high volumes of quickness training. Should I just leave them be and stick with the schedule?

Thanks. How about the defensive winger guys? Do i need to train them in defensive positioning attributes?
Here's my regen. Would you advise developing his defensive positioning or going all in on quickness development. He already has 15 in both attributes.

So for youth team training do you let the youth team managers do it or do you also set them up for pace and acceleration training?