This is a great test to start your journey using the app. This video is of Mitch retesting his range after completing 2-3 mins of DNS 1 + Challenges. Even when you have good range to start with, the right exercise will give you more control and often more range!
For years people have been told to 'stand up straight and pull your shoulders back' or 'shoulders back and down'... Frankly, this is bad advice and if you are an overhead athlete, it is dangerously bad advice.