When specifying components for a hydraulic power unit, the prime mover is sized based on torque, speed, and power requirements of the hydraulic pump. This is fairly straightforward for electric motors bec ause they generally have a starting torque that far exceeds running torque.
Great Danes live on average 8 to 10 years, but have been known to reach 12 years of age. The Great Dane is subject to two main health problems that afflict 99% if them - Dysplasia and Bloat. Great Danes cost more to look after than smaller dogs. Their shots will cost more, especially their heartworm medicine.
Yet as a general rule, Great Danes as a breed do not required excessive exercise. Over exercising a Great Dane is not recommended, especially with a growing puppy. Many Dane owners actually try to minimize Great Dane activity for their pup's first 18-months or so. Minimal exercise is typically enough to keep a growing puppy healthy and in shape. Over working a young dog during its rapid growth period can often have adverse affects on hip and joint development.