I don't have any medical information I can provide, but I run with my dog and have done so since he was 5-6 mos. old....he has had no adverse effects, but I did only do short runs with him (3-5 miles)until recently (the longest was 8 miles with water breaks) and I should say am not a super fast runner.
I would, however caution you about running with your dog when it is warm outside...Boxers snouts are not effective respiratory tools and they get hot and can't cool themselves down effectively. I recommend bringing along water for your dog as well.
Angus is a 14 mos. old and runs approx. 15 miles a week with me.
Good Luck!
Leezah & Angus
P.S. If you have questions, ask your vet for their opinion.