Player rating

[Accyrover]

No! still train them as they will still gain skill points. If you rest as you say, give them three training sessions, forget the practice match, train them on their own with stretching and cardio, two cardio split with stretching, leave three hours between sessions, on the day you intend to play them in you games rest them until 1 hour before the game then give them a quick stretching session.
Also check their skill levels if they had no form when you bought them it may be a while since they trained, as a rough guide Physical & Mental should be on a par with their quality IE. 27 quality, P&M 27, although personally I tend to push it a little to +1 if they are well prepared P&M I find they deal better with game fatigue, I've seen a marked improvement in the condition drop from games since I adopted this method, most used to finish with 70% or less as I play whole pitch pressure now they are finishing with 74-75% minimum.
'Morale' during training periods with no games you will see it drop, players hate training, let it drop to around 60%, if at this stage you feel they are ready to join the squad give them one pack and a place on the bench, give them maybe 15 minutes game time, next game boost morale to max and start.
Not sure what level you are in but in this game just like real life, footballers are greedy barstewards, especially the ones who think they are the top players, win bonuses IMO keeps morale higher and better performances from those players.
One player I bought this season his P&M was 4 levels below his primary, who ever owned him previously had loaded his primary skill to high, almost sorted now though.

I treat my training as they do in the real world as much as possible, resting the whole squad 1 in 3-4 days, Nordeus say they get full rest during the server switch each night, but Iv.e found morale is dropping far less since I adopted these training methods.

Not saying it's correct but I'm happy with them.