Need to verify some factual points. For example, the correct sitting posture at a desk: feet flat on the floor, monitor at eye level, chair height adjusted. How about ergonomics for phones and tablets? The "text neck" issue. The article should explain how to adjust device height to avoid hunching.
Improving your posture isn't just about "standing up straight"; it's about movement and habits. The 30/30 Rule : When working at a computer, take a 30-second break every 30 minutes to stand, stretch, or walk. Proper Standing Form overcoming poor posture pdf link