Do not run with a puppy that is 11 weeks old while on leash. Her running freely is a different story. I’m copying the following from my breeder on the subject. I also need to find the YouTube video about gaits of dogs in various situations and harnesses. I saw videos of the dog mentioned below and it was heartbreaking .
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Here is an X-ray of a 2 week old puppy. Look how much the bones have to grow before they form a proper bony joint! This is why you should never let puppies get too much strenuous exercise, such as jumping or running up and down then stairs. Please do not over-exercise your young baby! Doing too much impact activity at a young age will cause serious issues later in life (and sometimes even at a young age), such as hip dysplasia and other orthopedic conditions are rising in puppies!
This chart is worth gold:
https://www.puppyculture.com/new-exercise-chart.html
Enjoy your new puppy but remember you wouldn't make a 6 month old baby run a mile a day so don't make your puppy either! I love Puppy Culture! They have an awesome FB group, too!
https://www.puppyculture.com/new-appropriate-exercise.html
Also, please take a moment to read this article, too. It also explains why early spay and neuter is NOT good for dogs, especially for agile large breed dogs:
https://www.dailydogdiscoveries.com/puppy-growth-plates/?fbclid=IwAR0vawpxeKINmuP_4fUONmQGNt-gdFmR9JSsKQXvfgJ7vsa4qMUqzQIox6Q
I actually had a puppy owner run their puppy girl 6 miles daily at the age of 4 months, and they doubled the distance in a few months. They wanted her to run a full marathon by the age of 1. Said dog was returned to me at the age of 10 months with a completely destroyed elbow, the joint damaged so severely that it had fused together. Surgery was a bit less than $4,000, and needless to say the dog had no way of fully recovering. She made an exceptional companion for another family who provided her with a slow steady farm life with no active physical activity other than sniffing around and sunning in the sun in a pasture of her choice. She will forever limp and will always be at risk of re-injuring her damaged front leg.
Again, common sense and "less is more" attitude wins in the long run! Large breed dogs are slow maturers! Please give their bodies a chance to grow up before you let them show all the incredible athletic tricks they can do!
Some more information on harness use as well:
https://m.facebook.com/notes/tierph...lections-on-chest-harnesses/1369929759778331/
Our 17 Month Old Rhodesian gets maybe a mile run once or twice a week but at my pace, it’s more a fast walk for him. He wears a martingale collar but he’s had lots of loose leash walking training so we aren’t restricting him in anyway. He turns 18 months on the 29th but I’m probably waiting until 21 months for neutering. We weren’t going to neuter but with our 16 week old show girl, there is no way we won’t neuter him now as no accidental litters here!