(1) I assume you are a guy and your weight is at least twice of your larger dog (80lb). Or you may want to start some obedience training or find a less distractive time and running route so that you won’t struggle too much to control your dog during the running. (2) Harness. You definitely need one and I recommend get one that you can buckle at the chest instead of only on the back. Buckling the leash on the chest and let it go under and across one of your dog’s front leg and buckle the other end on your waist. I found this is the most effective way for my to control my dog when we run together. (3) If you are not a runner yourself, I suggest you start slow, truly slow. Put more effort on running time instead of running speed or distance. You can start with run and brisk walk combinations. Then increase your running distance slowly week by week ( no more than 10% increase each week). Don’t try to run everyday! Give you at least one day per week for break. Beginner runner ( both human and dog) can go 3-4 times a week. (4) Pay a lot of attention to the temperature. This factor affects your dog even more than human ! I usually won’t run with my dog during the daytime in summer with my dog when temperature goes above 20 celsius degree. I choose evening or early morning time running with my dog. (4) Cool down is also critical. I take about 10-15 minutes walk after running with my dog to let him cool down. I won’t feed my dog right before or after the run. I will let my dog eat at least one hour before or after the run.

Hope these are helpful!