Your standard poodle will continue to grow until 2 years of age. While exercise is an essential part of a healthy lifestyle, puppies should not be made to do rigorous or strenuous exercising. Over exercising your puppy will lead to mal development of their joints and will damage their growth plates. Puppies grow fast and can appear full grown at an early age, but keep in mind that their bodies are still developing and shouldn't be pushed to do things adult dogs can do. PuppyCulture has a great chart that shows activity level by age and specific activities such as running and swimming.