Why is exercising important for dogs and pups? Like humans, dogs need a balanced diet, proper nutrition, as well as physical activity to stay healthy and happy. Not only is exercise good for their physical condition, but it’s good for their mental health as well. Dogs that do not get enough exercise, regardless of their age, can quickly become frustrated and bored. When a dog gets the proper mental and physical stimulation, they are less likely to engage in destructive behavior, not to mention less likely to be part of the 56% of dogs in America who are considered overweight.