During screen time, when seated, which positioning is recommended for elbows, hips, knees, and ankles?

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Keeping the major joints in a neutral, 90-degree position while seated during screen time supports spinal alignment and reduces strain on the neck, shoulders, and wrists. When elbows are at 90 degrees with forearms supported, the wrists stay in a neutral position and you don’t have to reach forward, which lowers muscle tension in the upper body. Hips and knees at 90 degrees create a stable base that preserves the natural curves of the spine, while ankles at 90 degrees with feet flat promote good circulation and reduce leg fatigue. This setup also helps keep the screen at eye level so the neck doesn’t need to bend. If desk or chair height makes this hard, adjust with an appropriate chair height and use a footrest if needed. Angles far from 90 degrees—whether more open or more closed—tend to shift weight, tighen certain muscles, and increase strain over time.