If back upholstery height is too high, what occurs?

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Multiple Choice

If back upholstery height is too high, what occurs?

Explanation:
Back upholstery height should permit the arms to move without the chair’s back getting in the way. When the backrest is too tall, it sits against the upper back or shoulder girdle in a way that restricts scapular and shoulder motion, making reaching, lifting, or overhead movements harder. The result is interference with arm motion rather than improvement, and it doesn’t meaningfully enhance trunk stability or reduce fatigue; in fact, it can contribute to awkward posture and effort during arm tasks.

Back upholstery height should permit the arms to move without the chair’s back getting in the way. When the backrest is too tall, it sits against the upper back or shoulder girdle in a way that restricts scapular and shoulder motion, making reaching, lifting, or overhead movements harder. The result is interference with arm motion rather than improvement, and it doesn’t meaningfully enhance trunk stability or reduce fatigue; in fact, it can contribute to awkward posture and effort during arm tasks.

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