Golden Retriever (Detailed Introduction)

　　Pet dogs differ from stray and free-roaming dogs; many pet dogs’ activity range is almost limited to indoors or yards, lacking sufficient space for exercise. We all know that moderate exercise helps dogs' physical and mental health. Exercise amounts vary with different body sizes: small dogs should exercise about 15 minutes daily, medium-sized dogs about 30 minutes daily, and large dogs about 1 hour daily.

　　Avoid excessive intense exercise on weekends: exercise should be done daily; if necessary, some days can be skipped. Some dogs have almost no activity from Monday to Friday, but their owners take them for a lot of exercise or even intense workouts on Saturday or Sunday. This is actually very unhealthy, especially for dogs over six years old, as it may cause diseases related to the heart, spine, ligaments, and even joint injuries. Walking outside, step by step following the owner’s pace, is the best form of exercise. Firstly, it cultivates the relationship between owner and dog; secondly, both get sufficient and moderate physical activity. For large dogs needing more daily movement, family members taking turns accompanying them on multiple walks per day is a proper method. Using a motorcycle, pulling the dog by the collar strap at speeds above 20 km/h forcing the dog to run, is a very bad idea, especially for dogs over four years old, as it can easily harm their hearts.

Husky (Detailed Introduction)

　　When humans and dogs pass their prime, they should avoid exercise that causes very rapid heartbeats and breathing for extended periods. When breathing and heart rate remain rapid for several or more than ten minutes, it can easily cause myocardial hypoxia and oxygen deficiency throughout multiple body tissues. For example, a person walking at about 6 kilometers per hour does not strain heartbeat or breathing, but switching to slow jogging increases calorie consumption by about 60%, whereas myocardial oxygen consumption increases two to threefold.

　　Therefore, for middle-aged dogs and humans, the only benefit of running is a slightly higher calorie consumption within a limited time. However, the purpose of exercise is not just to burn calories but to promote blood circulation, muscle, ligament, joint, and internal organ health. Thus, choosing an exercise amount suitable for the dog’s age is very important.