If you are looking for a way to run with your dog but you can’t keep up with your dog check out a dog bicycle leash. There are multiple different brands but the one I am familiar with is the Walky Dog. They allow you to quickly and easily hook your dog up to your bike.
When you run with your dog attached to your bike it helps to tire them out more quickly which makes it a great way to exercise them if you don’t have a lot of time. It also keeps them safe by preventing your dog from running in front of the bike and getting run over. Using a dog bicycle leash also helps to absorb some of the shock if your dog starts to pull so that you are not knocked off of your bike.
If your dog can be reactive it’s a good idea to also hook your dog up to a leash that you can hold in your hand and pull on if your dog decides he or she wants to start chasing for example a squirrel.