Postur tengkuk dan beban

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Postur memain peranan terhadap faktor beban pada tengkuk. Setiap inci kepala ke depan, menambah beban sebanyak 10 pound (lbs). 10lbs bersamaan dgn 4.5kg.
12lbs. = 5.4kg
32lbs. = 14.5kg
42lbs. = 19.1kg

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