To begin with, you will need to start this training in a secure area in your house or garden, where your dog is comfortable and doesn't have too many distractions.
First, you will need to work out what type of reward motivates your dog the most.
For many dogs, it’s food, however, when they’re excited and running around, they may prefer to come back for a game with a particular toy.
Whatever the reward, it should be something your dog really wants, and something that is special, that they don’t get all the time, or ideally that you only use for recall.
Begin by teaching your dog your chosen cue word for the recall, this could be, ‘Come’, ‘Here’, or you can even use a whistle, just make sure you choose your word and stick to it.
If you find your dog isn’t reliably coming back, it’s because they either don’t understand the cue yet, or the reward you are offering isn’t motivating enough.
Go back to the beginning and be patient, it will be worth it.
Keep practicing the recall as much as possible, at home and in your garden, if you have one.
Your dog needs be reliably coming back to you before you progress to adding distractions or trying this outside of your home.