Adjust your chair and how you are sitting in it
Now on to looking at the seat you are using. We all may not have access to an office chair, but there are many ways we can adapt our kitchen or dining room chairs in order to promote a nice upright posture and prevent rounding of the shoulders. When sitting in your chair it’s important that not only your back is aligned properly, but also your feet. It is important that your feet are able to touch the ground and your knees are bent at 90 degrees. With this position of your feet and legs it will help to promote better trunk posture. Moving up to the spine it is important to promote a nice curve in your lower back. In order to do so, take a large beach towel and roll it up. Take this towel roll and place it along the small of your back and adjust as needed. This will promote the natural curve of your spine and help you to really bring the shoulders back and prevent the dreaded rounded shoulders.
Now onto the toughest part, keeping those shoulders back. Using a chair with a nice high back will be one way to help this, but another important aspect is to bring your shoulders back so that your shoulder blades are trying to squeeze a towel located between them. With practice and awareness, you will find that this becomes easier and easier.