Leaning towards the laptop/computer
Sitting in a ‘forward-leaning-position’ for a short period of time (like when you’re eating dinner or something) isn’t terrible for you, but spending hours at a time on the computer this way can lead to problems. Sitting in this position frequently can lead to lower back pain as well as discomfort in the neck or upper part of our shoulders.
To remedy this, try keeping your shoulders relaxed and have your back resting firmly on the back of your chair. Ideally, a 90-100 degree angle at your hips and knees will also help out tremendously. Lastly, try having your screen as close to your horizontal sight as you can to relieve your neck from having to stare at an angle for long periods of time.