There is no such thing as 'staying in shape;' you either work to get better, or you allow yourself to get worse.
John KesselYou have to learn every day. You can't be playing every day, but you can be practicing. If you cannot be practicing with a net and others daily, you still can be learning about the game by reading, watching and imaging. You must learn every day, if you want to be a real volleyball player.
John Kessel