I don't think you should be worried about to long of walks and too much jumping. This is what puppies do. They jump, run and just like to have some fun. They got lots of energy to burn, you know.
Just when your done with the walks, make sure there is some water for your dogs to drink. Jumping is just what puppies do. They are very, very, VERY hyper sometimes. Don't be worried or paranoid. This is what pups do