The win bonus just helps their morale a bit I guess. You shouldn't train them right after the match, if you do, make sure the players who played have normal training, and the subs hard. I let my players relax a bit, since I usually come home an hour or so after the match (If it starts around 12pm my time (Gmt +2)) and if I have a match around 7/8pm I just train them min 3 hours before the match so they can get some condition.
Conclusion: Train your players 3 hours before a match and an hour after the match. If you want to buy tokens, I'd suggest you to spend them on red and green packs, so when a player is injured you can heal him and if he's low on condition you can give him more condition.