A quick way that I used to burn off wnergy was to go our reservoirs or any place with a decent hill. I would stay at the top and throw the ball down. The running back up the steep side qould give them a good workout. Mine are good off leash so this was a great option for us.
"If there ever comes a day when we can't be together,keep me in your heart, I'll stay there forever." A.A. Milne