Exercise for Dogs
Depending on your dog, The type of exercise and the length of time will vary. If you have a dog who needs to run and I mean run at a good speed, then you may want to consider something I use on a daily basis with my blue heeler. www.biketowleash.com
Walking your dog at least once a day for a 30-40 minute walk is so good for them! Not only is the exercise great for them, but the smells, sights and sounds are as well. Dogs who do not get out on a regular basis usually have behavior problems.
Some breeds of dogs need to swim. I would consider checking in your area for a dog pool where you can pay for use of the pool. It is good for the dogs to get what they need; imagine how frustrating it is for a dog to not get the exercise they need! And again, behavior issues can show up in your dog without sufficient exercise.
If you have a husky or any dog that loves to pull, I would consider dry land mushing.