Thesis Erik van der Graaff

Chapter 4 several studies indicated that a decrease in scapular upward rotation may be ƒ••‘…‹ƒ–‡† ™‹–Š ƒ ‹…”‡ƒ•‡ ‹ ȋ•Š‘—Ž†‡”Ȍ ‹Œ—”› ”‹• ȋ ›ƒƒ ‡– ƒŽǤǡ ʹͲͲͺǢ ‘”•ƒ ‡– ƒŽǤǡ ʹͲͲ͵Ǣ —”Šƒ”– ‡– ƒŽǤǡ ʹͲͲ͵Ǣ ‹„Ž‡”ǡ ͳͻͻͺǢ —†‡™‹‰ ‡– ƒŽǤǡ ʹͲͲͲȌǡ ‘‹–‘”‹‰ –Š‡•‡ Ȃ ƒ† ‘–Š‡” Ǧ ›‘—‰ ‡Ž‹–‡ ’‹–…Š‡”• ‹ –Š‡‹” ’Š›•‹…ƒŽ †‡˜‡Ž‘’‡–ǡ ˆ‘” ‹•–ƒ…‡ ˆ‘” •…ƒ’—Žƒ” —’™ƒ”† ”‘–ƒ–‹‘ǡ ƒ† –Š‡‹” ’‡”ˆ‘”ƒ…‡ ȋ–Š”‘™‹‰ •’‡‡†Ȍ ‹‰Š– „‡ ‹’‘”–ƒ– ‹ –Š‡ ’”‡˜‡–‹‘ ‘ˆ ’‹–…Š‹‰Ǧ”‡Žƒ–‡† •Š‘—Ž†‡” •›’–‘•Ǥ Thus, future research should focus on assessing scapular motion over a longer time period during the development of young athletes, especially in asymmetric, injury prone sports, such as baseball pitching. Conclusion This study showed that the dominant arms of elite youth baseball pitchers ‡šŠ‹„‹– ‘”‡ •…ƒ’—Žƒ” —’™ƒ”† ”‘–ƒ–‹‘…‘’ƒ”‡† –‘ –Š‡‹” ‘Ǧ†‘‹ƒ– ƒ”Ǥ However, scapular upward rotation was not greater for the older pitchers as …‘’ƒ”‡† –‘ –Š‡ ›‘—‰‡” ’‹–…Š‡” ƒ† ‹– ƒŽ•‘ †‹† ‘– ‹…”‡ƒ•‡ ‘˜‡” –Š‡ ‘‡Ǧ year study period in either age group. As a result of the asymmetry in upward scapular rotation, these athletes could be at risk to develop shoulder injuries, ƒ† –Š—• ‹ –Š‡ –”ƒ‹‹‰ ’”‘‰”ƒ ‘ˆ –Š‡•‡ ƒ–ŠŽ‡–‡• •’‡…‹ϐ‹…‡š‡”…‹•‡•…‘—Ž† „‡ incorporated to minimize scapular upward rotation of the throwing arm.

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