Training - is harder training better?

[Jzinna]

Thanks! I think I understand. If I want to improve 1% fitness in a player, I could maybe get it with two stretch sessions or with four warm-up sessions, if both are at the same level.
I guess the harder sessions are more useful for those who cannot log in as often, and may need to get the training out of the way quickly

[Julandron]

Do you guys know what the best drills are for each special ability? This season I am having a harder time adding the SA to my youth players