Almost every golfer I know claims they play golf only for the exercise. Of course, most courses require motorized golf carts, because this speeds up the play.
For those few courses that do not have carts, golfers have the options of a caddy, carrying their clubs or using a pull cart. Pull carts are very easy to pull, even on a hilly course. But, recently I saw the ultimate in stupidity. They now make a motorized, battery-powered pull cart. Instead of pulling the cart, you merely push some buttons on the handle, and steer the cart. For a mere $700, you can have the ultimate pull cart.
Now, if they would only put a larger motor and battery on this contraption, you could hook a wheeled chair behind, and just ride along, getting your exercise.