fa تأثیر خستگی عضلات تنه بر کنترل تعادلی ایستا در دو گروه سنی جوان و میانسال فیزیوتراپی Physiotherapy پژوهشي Research <font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0cm 0cm 0pt text-align: justify line-height: normal unicode-bidi: embed direction: rtl text-justify: kashida text-kashida: 0%" dir="rtl"><b><span lang="AR-SA" style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman"">زمینه و هدف</span></b><span lang="AR-SA" style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman"">: </span><span lang="FA" style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-bidi-language: FA">افتادن نتیجه عدم بازیابی تعادل در افراد است. هدف از این تحقیق بررسی تأثیر خستگی عضلات بازکننده تنه بر کنترل تعادلی ایستا در دو گروه سنی جوان و میانسال در افراد سالم است.<o:p /></span></p><font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0cm 0cm 0pt text-align: justify line-height: normal unicode-bidi: embed direction: rtl text-justify: kashida text-kashida: 0%" dir="rtl"><b><span lang="FA" style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-bidi-language: FA">روش کار</span></b><span lang="FA" style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-bidi-language: FA">: 10 زن جوان (6/1</span><span lang="FA" style="font-family: "Times New Roman","serif" font-size: 10pt mso-ansi-font-size: 9.0pt mso-bidi-language: FA">±</span><span lang="FA" style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-bidi-language: FA"> 23 سال) و 6 زن میانسال (4/5 </span><span lang="FA" style="font-family: "Times New Roman","serif" font-size: 10pt mso-ansi-font-size: 9.0pt mso-bidi-language: FA">±</span><span lang="FA" style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-bidi-language: FA"> 51 سال) در آزمون بی‌حرکت ایستادن روی دو پا بر روی یک صفحه نیرو پیش و پس از خستگی با چشمان بسته شرکت کردند. خستگی؛ با تکرار حرکت بازکردن تنه تا رسیدن به سطح خستگی در افراد حاصل شد. برای ارزیابی تعادل ایستا جابهجایی مرکز فشار فرد در دو جهت </span><span style="font-family: "Times New Roman","serif" font-size: 9pt mso-bidi-language: FA mso-bidi-font-size: 10.0pt mso-bidi-font-family: "B Mitra"" dir="ltr">A/P</span><span dir="rtl"></span><span dir="rtl"></span><span style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-bidi-language: FA"><span dir="rtl"></span><span dir="rtl"></span> <span lang="FA"><font face="B Mitra" size="2">و </font></span></span><span style="font-family: "Times New Roman","serif" font-size: 9pt mso-bidi-language: FA mso-bidi-font-size: 10.0pt mso-bidi-font-family: "B Mitra"" dir="ltr">M/L</span><span dir="rtl"></span><span dir="rtl"></span><span style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-bidi-language: FA"><span dir="rtl"></span><span dir="rtl"></span> <span lang="FA"><font size="2"><font face="B Mitra">روی صفحه نیرو اندازه گرفته‌شد.<o:p /></font></font></span></span></p><font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0cm 0cm 0pt text-align: justify line-height: normal unicode-bidi: embed direction: rtl text-justify: kashida text-kashida: 0%" dir="rtl"><b><span lang="FA" style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-bidi-language: FA">یافته ها</span></b><span lang="FA" style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-bidi-language: FA">: اختلاف معنی‌داری بین عامل سن و خستگی مشاهده نشد. تغییرپذیری (</span><span style="font-family: "Times New Roman","serif" font-size: 9pt mso-bidi-language: FA mso-bidi-font-size: 10.0pt mso-bidi-font-family: "B Mitra"" dir="ltr">COP (center of pressure</span><span dir="rtl"></span><span dir="rtl"></span><span lang="FA" style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-bidi-language: FA"><span dir="rtl"></span><span dir="rtl"></span>) در گروه میانسال در مقایسه با افراد جوان در دو حالت پیش و پس از خستگی بیشتر بود.<o:p /></span></p><font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0cm 0cm 0pt text-align: justify line-height: normal unicode-bidi: embed direction: rtl text-justify: kashida text-kashida: 0%" dir="rtl"><b><span lang="FA" style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-bidi-language: FA">نتیجه گیری</span></b><span lang="FA" style="font-family: "B Mitra" font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: "Times New Roman" mso-hansi-font-family: "Times New Roman" mso-bidi-language: FA">: نتایج این تحقیق نشان داد که خستگی عضلات اکستنسور تنه بر تعادل ایستا تأثیر نمی‌گذارد و بین دو گروه تفاوت معنی‌داری مشاهده نشد. کنترل پاسچری با افزایش سن افزایش می‌یابد. اثر خستگی عضلات تنه بر کنترل تعادل ایستا معنی‌دار نبود.<o:p /></span></p><font face="Times New Roman" size="3"> </font> <font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0cm 0cm 0pt text-align: justify line-height: normal text-justify: kashida text-kashida: 0%"><b><span style="font-family: "Times New Roman","serif" font-size: 12pt mso-bidi-language: FA">Background</span></b><span style="font-family: "Times New Roman","serif" font-size: 12pt mso-bidi-language: FA">: Falls is due to people's failure of balance recovery. The purpose of this study was to investigate the effect of trunk extensor muscle fatigue on static balance control in young healthy adults compared to middle aged participants.<o:p /></span></p><font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0cm 0cm 0pt text-align: justify line-height: normal text-justify: kashida text-kashida: 0%"><b><span style="font-family: "Times New Roman","serif" font-size: 12pt mso-bidi-language: FA">Methods: </span></b><span style="font-family: "Times New Roman","serif" font-size: 12pt mso-bidi-language: FA">Ten<b> </b>young adult females (23 ± 1.6 years) and 6 middle-aged females (51 ± 5.4 years) participated in stand immobile test on a force plate, with their feet together and eyes closed under two conditions before and after fatigue. Fatigue was achieved through repetitive extensions of the trunk until a subjective fatigue level was reached. We measured center of pressure (COP) displacements in the A/P and M/L directions using a force plate to assess static balance.<o:p /></span></p><font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0cm 0cm 0pt text-align: justify line-height: normal text-justify: kashida text-kashida: 0%"><b><span style="font-family: "Times New Roman","serif" font-size: 12pt mso-bidi-language: FA">Results: </span></b><span style="font-family: "Times New Roman","serif" font-size: 12pt mso-bidi-language: FA">We did not observe any significant interaction between age and fatigue. The COP variability was higher for the middle aged compared to the young adults in both the fatigue and no-fatigue conditions.<o:p /></span></p><font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0cm 0cm 0pt text-align: justify line-height: normal text-justify: kashida text-kashida: 0%"><b><span style="font-family: "Times New Roman","serif" font-size: 12pt mso-bidi-language: FA">Conclusion:</span></b><span style="font-family: "Times New Roman","serif" font-size: 12pt mso-bidi-language: FA"> The results of this study indicate that trunk extensor fatigue does not affect static balance differently for young compared to middle aged subjects. This study also suggests that postural control decreases significantly with increasing age. Trunk extensor fatigue did not significantly affect the balance control of upright stance.<o:p /></span></p><font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0cm 0cm 0pt text-align: justify line-height: normal text-justify: kashida text-kashida: 0%"><b><span style="font-family: "Times New Roman","serif" font-size: 12pt mso-bidi-language: FA"><!--stripped--><font size="3"> </font><!--stripped--></span></b></p><font face="Times New Roman" size="3"> </font> خستگی, عضلات بازکننده تنه, کنترل تعادلی ایستا Fatigue, Trunk, extensor muscle, Static balance control 75 80 http://rjms.iums.ac.ir/browse.php?a_code=A-10-1-1651&slc_lang=fa&sid=1 Mehrangiz Qorbani مهرانگیز قربانی 3900319475328460028386 3900319475328460028386 Yes Young Researchers and Elite Club, Science and research Branch, Islamic Azad University, Tehran, Iran دانشگاه آزاد اسلامی، واحد علوم تحقیقات تهران، باشگاه پژوهشگران جوان و نخبگان، تهران، ایران