Need a lot of exercise?

About as much as you do. Most Mastiffs are like most humans; they can manage a sedentary life reasonably well - but, also like most humans, they reach a physical peak with a moderate degree of exercise. It is important that you NOT over exercise any Mastiff under 2 years of age. Up until this age (and sometimes later) their skeleton is still developing. Since Mastiffs tend to be stoic, and also will do just about anything to be with and please their people, they can easily end up with an inflamed joint or other problems like those that beset humans who run for exercise. When you do begin to exercise your Mastiff, begin GRADUALLY. Build up SLOWLY. Make sure you know and watch for the signs of your dog getting tired or overheated. Take ice and water with you in case the dog overheats. The extra weight will add more effect to your workout! This is not to say that Mastiffs should not have any exercise at all as pups. On the contrary, Mastiff puppies are still puppies and need to do puppy ...  more

About as much as you do. Most Mastiffs are like most humans; they can manage a sedentary life reasonably well - but, also like most humans, they reach a physical peak with a moderate degree of exercise. It is important that you NOT over exercise any Mastiff under 2 years of age. Up until this age (and sometimes later) their skeleton is still developing. Since Mastiffs tend to be stoic, and also will do just about anything to be with and please their people, they can easily end up with an inflamed joint or other problems like those that beset humans who run for exercise. When you do begin to exercise your Mastiff, begin GRADUALLY. Build up SLOWLY. Make sure you know and watch for the signs of your dog getting tired or overheated. Take ice and water with you in case the dog overheats. The extra weight will add more effect to your workout! This is not to say that Mastiffs should not have any exercise at all as pups.