ehe, nice to see you're aiming for the top Suga!!
Older players aren't more prone to injury no, but they DO take a whoooole lotta longer to recover from them.
For example: i have an injured 33-yr old midfielder
Markku Halmetoja 1+
11 000 Euro, 33 years, wretched form
Has solid experience and poor leadership abilities [Unpredictable]
Stamina: passable Keeper: disastrous
Playmaking: solid Passing: poor
Winger: poor Defending: weak
Scoring: poor Set Pieces: solid
As you can see a very decent experienced playmaker, but get this: i bought him a month ago (30days!) when he was injured for 4 weeks, and he's still 1 week out
Whereas my 20-yr old keeper practically recovered from 4 weeks injury in one week.
That's the entire young-old thing eh:
young players:
->adavantages: train fast, practically don't lose any skills in their secondary stats, recover fast from injury
->disadvantages: expensive!, very low experience
old players
->advantages: cheap, lots of experience
->disadvantages: practically don't advance anymore in skills, non-trained stats go downhill quick, enormously slow injury recovery.
Best is to mix your team a bit with both. Try not to position older players in the area you train, as they usually will go crap in a season or two anyway. (if not in his trained stat in the others)
Good luck sunday!