There’s certainly evidence that a decent intake of both Protein and Carbohydrate after exercise helps the body restore muscles and replenish energy faster. This should happen within about 2 hours of finishing exercise.
I used to suffer really badly the next day after serious exercise (big ride, or playing footie) until I strted making sure I had a recovery drink
Not sure about buying expensive “Sport Nutrition” drinks though. I just have a pint of milk as it contains lots of protein and sugar in the lactose. To my knowledge, whilst studies have shown that some of the manufactured sports drinks are as good as milk, there is nothing that has shown them to be better *awaits proof to be provided*
So my advice would be to down a pint of milk after each ride and you’ll find yourself feeling better fairly quickly
EDIT – And as above, if you have any bananas and/or berries to add to the mix, so much the better