Are there bike rentals in your place? In big parks here, there used to be bike rentals where you can flex your legs for the needed exercise. However, some of the parks have removed the bike rentals due to accidents and complaints - some bikers don't know the rules of biking thus collision happens. But a bike rental in the park is very alluring particularly to riders like me. How about a half hour spin around the park? That would be great in the early morning especially if the ride is followed by a good breakfast in the park's restaurant.