I mainly play on small courts, so there's a lot of short sprinting, changing direction rapidly etc. So while my first thought to build up stamina is simply to run long distance, I'm wondering if there is a more time-efficient way dependent on the sport?
Also, in terms of energy input before games, what are some good recommendations? I generally just throw sugar at myself within 30-60minutes pregame, chocolate bar + lucozade / pocari sweat. I'm sure these make some difference as I definitely feel more lethargic much sooner without any pre-game sugar, however I'd like to try and refine this as well, in terms of timing, amount, type etc.