I like the Buddy System hands free leash. I run with two dogs, and I like them to be on either side of me. There are various configurations so if you prefer a Y-splitter for both dogs on one side that's an option also.
I'm not sure how well this would work if your dogs aren't chill about healing and running smoothly, though. Basically it's a decision between compromising your running posture with a leash, or accepting some amount of pressure on your waist/back with a belt system. As my dogs aren't big pullers, pressure isn't really an issue, and this works great for us. I may try to add a bungee end just for extra insurance against any pressure, but so far I haven't had any issues without them.