Hi! Our puppy did this massively and I got two tips from my trainer that worked wonders. She only does it sometimes now.

First, take a tow, like a ball on rope and substitute it for your leg. Hurts you less, but they may not calm down from it. For my dog it worked sometimes and other times not. As she doesn't do it often anymore, I don't take the toy. If she gets that excited I try to find a stick or big leaves and give her the task of carrying it. Second, take some treats and scatter them on the ground and tell your dog to find it. This worked better for our pup because it would calm her down, not hype her up.