I know this is late but... It's hot out there! Make sure you drink your water. Believe it or not the second your thirsty you are already dehydrated. Water is what lubricates your myofibrils(your muscles) and if you are dehydrated it makes your body inefficient. The less water you have the more effort it takes to move your muscles. Considering that the entire game of paintball requires serious muscle movement it's important to hydrate. Not only when you start playing but the night before you play you need to drink water. Also remember that coffee, soda, and alcohol dehydrate you.
Top Tip of the day! A average $1 (.5 liter)water bottle will fit in a pod pack. When i play i usually carry 3 pods of paint and a bottle of water. The pod pack helps insulate it and keep it cool.