<?xml version="1.0" encoding="utf-8"?>
<journal>
<title>Razi Journal of Medical Sciences</title>
<title_fa>مجله علوم پزشکی رازی</title_fa>
<short_title>RJMS</short_title>
<subject>Medical Sciences</subject>
<web_url>http://rjms.iums.ac.ir</web_url>
<journal_hbi_system_id>39</journal_hbi_system_id>
<journal_hbi_system_user>journal39</journal_hbi_system_user>
<journal_id_issn>2228-7043</journal_id_issn>
<journal_id_issn_online>2228-7051</journal_id_issn_online>
<journal_id_pii></journal_id_pii>
<journal_id_doi></journal_id_doi>
<journal_id_iranmedex></journal_id_iranmedex>
<journal_id_magiran></journal_id_magiran>
<journal_id_sid></journal_id_sid>
<journal_id_nlai></journal_id_nlai>
<journal_id_science></journal_id_science>
<language>en</language>
<pubdate>
	<type>jalali</type>
	<year>1392</year>
	<month>9</month>
	<day>1</day>
</pubdate>
<pubdate>
	<type>gregorian</type>
	<year>2013</year>
	<month>12</month>
	<day>1</day>
</pubdate>
<volume>20</volume>
<number>114</number>
<publish_type>online</publish_type>
<publish_edition>1</publish_edition>
<article_type>fulltext</article_type>
<articleset>
	<article>


	<language>fa</language>
	<article_id_doi></article_id_doi>
	<title_fa>تاثیر اعمال بار خارجی بر روی ثبات وضعیتی افراد سالم و بیماران مبتلا به کمردرد مزمن غیراختصاصی</title_fa>
	<title>The effect of external load on postural stability during quit standing in healthy and non-specific low back pain subjects</title>
	<subject_fa>فیزیوتراپی</subject_fa>
	<subject>Physiotherapy</subject>
	<content_type_fa>پژوهشي</content_type_fa>
	<content_type>Research</content_type>
	<abstract_fa>

&lt;font face=&quot;Times New Roman&quot; size=&quot;3&quot;&gt; &lt;/font&gt;&lt;p class=&quot;MsoNormal&quot; style=&quot;margin: 0in 0in 0pt text-align: justify line-height: normal unicode-bidi: embed direction: rtl text-justify: kashida text-kashida: 0%&quot; dir=&quot;rtl&quot;&gt;&lt;b&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: &quot;Times New Roman&quot; mso-hansi-font-family: &quot;Times New Roman&quot;&quot;&gt;زمینه و هدف&lt;/span&gt;&lt;/b&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: &quot;Times New Roman&quot; mso-hansi-font-family: &quot;Times New Roman&quot;&quot;&gt;:
هدف مطالعه حاضر به بررسی تاثیر اعمال بار خارجی بر روی کنترل تعادل در حالت
ایستاده معمولی در افراد کمردردی و گروه سالم پرداخته است.&lt;o:p /&gt;&lt;/span&gt;&lt;/p&gt;&lt;font face=&quot;Times New Roman&quot; size=&quot;3&quot;&gt; &lt;/font&gt;&lt;p class=&quot;MsoNormal&quot; style=&quot;margin: 0in 0in 0pt text-align: justify line-height: normal unicode-bidi: embed direction: rtl text-justify: kashida text-kashida: 0%&quot; dir=&quot;rtl&quot;&gt;&lt;b&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: &quot;Times New Roman&quot; mso-hansi-font-family: &quot;Times New Roman&quot;&quot;&gt;روش کار&lt;/span&gt;&lt;/b&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: &quot;Times New Roman&quot; mso-hansi-font-family: &quot;Times New Roman&quot;&quot;&gt;:
مطالعه حاضر از نوع شبه تجربی می باشد. بار خارجی بر روی 23 فرد سالم و 21 بیمار
کمردردی اعمال شد و تاثیرات آن بر روی کنترل تعادل از طریق پارامترهای استخراجی از
مرکز فشار مورد بررسی قرار گرفت.&lt;/span&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: &quot;Times New Roman&quot; mso-hansi-font-family: &quot;Times New Roman&quot; mso-bidi-language: FA&quot;&gt; &lt;/span&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: &quot;Times New Roman&quot; mso-hansi-font-family: &quot;Times New Roman&quot;&quot;&gt;پارامترهای
مرکز فشار جهت محاسبه انحراف معیار دامنه حرکت، انحراف معیار سرعت در جهت قدامی
خلفی و طرفی، میانگین کلی سرعت و پارمترهای صفحه فاز استفاده شد. با استفاده از
آزمون دو طرفه &lt;/span&gt;&lt;span style=&quot;font-family: &quot;Times New Roman&quot;,&quot;serif&quot; font-size: 9pt mso-bidi-font-size: 10.0pt mso-bidi-font-family: &quot;B Mitra&quot;&quot; dir=&quot;ltr&quot;&gt;ANOVA&lt;/span&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: &quot;Times New Roman&quot; mso-hansi-font-family: &quot;Times New Roman&quot;&quot;&gt;&lt;span dir=&quot;rtl&quot;&gt;&lt;/span&gt; تاثیر اعمال بار خارجی در دو گروه و
مقایسه وضعیت تعادل در گروه مورد بررسی قرار گرفت&lt;/span&gt;&lt;span lang=&quot;FA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 12pt mso-fareast-font-family: Calibri mso-bidi-language: FA&quot;&gt;.&lt;o:p /&gt;&lt;/span&gt;&lt;/p&gt;&lt;font face=&quot;Times New Roman&quot; size=&quot;3&quot;&gt; &lt;/font&gt;&lt;p class=&quot;MsoNormal&quot; style=&quot;margin: 0in 0in 0pt text-align: justify line-height: normal unicode-bidi: embed direction: rtl text-justify: kashida text-kashida: 0%&quot; dir=&quot;rtl&quot;&gt;&lt;b&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: &quot;Times New Roman&quot; mso-hansi-font-family: &quot;Times New Roman&quot;&quot;&gt;یافته‌ها:&lt;/span&gt;&lt;/b&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 13pt mso-bidi-language: FA&quot;&gt; &lt;/span&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: &quot;Times New Roman&quot; mso-hansi-font-family: &quot;Times New Roman&quot;&quot;&gt;نتایج
حاصله نشان داد که اعمال بار خارجی تاثیر اصلی بر روی پارامترهای انحراف جابجایی
در جهت طرفی و قدامی-خلفی و پارامترهای صفحه فاز داشته است. اثر تداخلی معنی داری
بین بار و گروه مشاهده نشد. همچنین قبل از اعمال بار خارجی ، وضعیت ثبات وضعیتی در
بین دو گروه تفاوت معنی‌داری نداشته است.&lt;/span&gt;&lt;span lang=&quot;FA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 12pt mso-ascii-font-family: Calibri mso-hansi-font-family: Calibri mso-bidi-language: FA&quot;&gt;&lt;o:p /&gt;&lt;/span&gt;&lt;/p&gt;&lt;font face=&quot;Times New Roman&quot; size=&quot;3&quot;&gt; &lt;/font&gt;&lt;p class=&quot;MsoNormal&quot; style=&quot;margin: 0in 0in 0pt text-align: justify line-height: normal unicode-bidi: embed direction: rtl text-justify: kashida text-kashida: 0%&quot; dir=&quot;rtl&quot;&gt;&lt;b&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: &quot;Times New Roman&quot; mso-hansi-font-family: &quot;Times New Roman&quot;&quot;&gt;نتیجه&lt;/span&gt;&lt;/b&gt;&lt;b&gt;&lt;span style=&quot;font-family: &quot;Times New Roman&quot;,&quot;serif&quot; font-size: 9pt mso-bidi-font-size: 10.0pt&quot; dir=&quot;ltr&quot;&gt;‌&lt;/span&gt;&lt;/b&gt;&lt;b&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: &quot;Times New Roman&quot; mso-hansi-font-family: &quot;Times New Roman&quot;&quot;&gt;گیری&lt;/span&gt;&lt;/b&gt;&lt;span lang=&quot;AR-SA&quot; style=&quot;font-family: &quot;B Mitra&quot; font-size: 10pt mso-ansi-font-size: 9.0pt mso-ascii-font-family: &quot;Times New Roman&quot; mso-hansi-font-family: &quot;Times New Roman&quot;&quot;&gt;:
نتایج حاصله نشان داد که پوشیدن یک جلیقه ده کیلوگرمی باعث افزایش نوسان وضعیتی در
افراد شده است که این مساله احتمال افتادن و ایجاد آسیب را افزایش می دهد.&lt;o:p /&gt;&lt;/span&gt;&lt;/p&gt;&lt;font face=&quot;Times New Roman&quot; size=&quot;3&quot;&gt; &lt;/font&gt;</abstract_fa>
	<abstract>

&lt;font face=&quot;Times New Roman&quot; size=&quot;3&quot;&gt; &lt;/font&gt;&lt;p class=&quot;MsoNormal&quot; style=&quot;margin: 0in 0in 0pt text-align: justify line-height: normal text-justify: inter-ideograph&quot;&gt;&lt;b&gt;&lt;span style=&quot;font-family: &quot;Times New Roman&quot;,&quot;serif&quot; font-size: 12pt mso-bidi-language: FA&quot;&gt;Background: &lt;/span&gt;&lt;/b&gt;&lt;span style=&quot;font-family: &quot;Times New Roman&quot;,&quot;serif&quot; font-size: 12pt&quot;&gt;The
purpose of this study was to identify the effects of external loads on balance
control during upright stance in Chronic Low Back Pain (CLBP) patients and
healthy adults.&lt;/span&gt;&lt;span style=&quot;font-size: 13pt mso-bidi-font-family: &quot;B Mitra&quot;&quot;&gt;&lt;o:p /&gt;&lt;/span&gt;&lt;/p&gt;&lt;font face=&quot;Times New Roman&quot; size=&quot;3&quot;&gt; &lt;/font&gt;&lt;p class=&quot;MsoNormal&quot; style=&quot;margin: 0in 0in 0pt text-align: justify line-height: normal text-justify: inter-ideograph tab-stops: right 7.3pt center 265.9pt&quot;&gt;&lt;b&gt;&lt;span style=&quot;font-family: &quot;Times New Roman&quot;,&quot;serif&quot; font-size: 12pt&quot;&gt;Methods&lt;/span&gt;&lt;/b&gt;&lt;span style=&quot;font-family: &quot;Times New Roman&quot;,&quot;serif&quot; font-size: 12pt&quot;&gt;: This study was
a qausi-experimental design. External loads were applied to 23 young, healthy
participants and 21 low back pain subjects, and effects on balance control were
characterized by Center-of-Pressure (COP) based measures. Center COP data were
used to calculate standard deviation of amplitude, standard deviation of
velocity in anterior-posterior and medial-lateral directions, mean total
velocity and phase plane parameters. We used two way ANOVA to explore the
pre/post applying external load and the between groups difference. &lt;o:p /&gt;&lt;/span&gt;&lt;/p&gt;&lt;font face=&quot;Times New Roman&quot; size=&quot;3&quot;&gt; &lt;/font&gt;&lt;p class=&quot;MsoNormal&quot; style=&quot;margin: 0in 0in 0pt text-align: justify line-height: normal text-justify: inter-ideograph tab-stops: right 7.3pt center 265.9pt&quot;&gt;&lt;b&gt;&lt;span style=&quot;font-family: &quot;Times New Roman&quot;,&quot;serif&quot; font-size: 12pt&quot;&gt;Results:&lt;/span&gt;&lt;/b&gt;&lt;span style=&quot;font-size: 12pt mso-ascii-font-family: Calibri mso-hansi-font-family: Calibri mso-bidi-font-family: &quot;B Mitra&quot;&quot;&gt;&lt;font face=&quot;Calibri&quot;&gt; &lt;/font&gt;&lt;/span&gt;&lt;span style=&quot;font-family: &quot;Times New Roman&quot;,&quot;serif&quot; font-size: 12pt&quot;&gt;The results showed that applying
external load had a significant main effect on the standard deviation of
amplitude in anterior-posterior and medio-lateral direction and &lt;/span&gt;&lt;span style=&quot;top: 5.5pt line-height: 115% font-family: &quot;Calibri&quot;,&quot;sans-serif&quot; font-size: 11pt position: relative mso-bidi-font-family: Arial mso-ascii-theme-font: minor-latin mso-fareast-font-family: &quot;Times New Roman&quot; mso-fareast-theme-font: minor-fareast mso-hansi-theme-font: minor-latin mso-bidi-theme-font: minor-bidi mso-bidi-language: AR-SA mso-text-raise: -5.5pt mso-ansi-language: EN-US mso-fareast-language: EN-US&quot;&gt;&lt;v:shapetype id=&quot;_x0000_t75&quot; stroked=&quot;f&quot; filled=&quot;f&quot; path=&quot;m@4@5l@4@11@9@11@9@5xe&quot; o:preferrelative=&quot;t&quot; o:spt=&quot;75&quot; coordsize=&quot;21600,21600&quot;&gt;
 &lt;v:stroke joinstyle=&quot;miter&quot;&gt;
 &lt;v:formulas&gt;
  &lt;v:f eqn=&quot;if lineDrawn pixelLineWidth 0&quot;&gt;
  &lt;v:f eqn=&quot;sum @0 1 0&quot;&gt;
  &lt;v:f eqn=&quot;sum 0 0 @1&quot;&gt;
  &lt;v:f eqn=&quot;prod @2 1 2&quot;&gt;
  &lt;v:f eqn=&quot;prod @3 21600 pixelWidth&quot;&gt;
  &lt;v:f eqn=&quot;prod @3 21600 pixelHeight&quot;&gt;
  &lt;v:f eqn=&quot;sum @0 0 1&quot;&gt;
  &lt;v:f eqn=&quot;prod @6 1 2&quot;&gt;
  &lt;v:f eqn=&quot;prod @7 21600 pixelWidth&quot;&gt;
  &lt;v:f eqn=&quot;sum @8 21600 0&quot;&gt;
  &lt;v:f eqn=&quot;prod @7 21600 pixelHeight&quot;&gt;
  &lt;v:f eqn=&quot;sum @10 21600 0&quot;&gt; &lt;/v:f&gt;&lt;/v:f&gt;&lt;/v:f&gt;&lt;/v:f&gt;&lt;/v:f&gt;&lt;/v:f&gt;&lt;/v:f&gt;&lt;/v:f&gt;&lt;/v:f&gt;&lt;/v:f&gt;&lt;/v:f&gt;&lt;/v:f&gt;&lt;/v:formulas&gt;
 &lt;v:path o:connecttype=&quot;rect&quot; gradientshapeok=&quot;t&quot; o:extrusionok=&quot;f&quot;&gt;
 &lt;o:lock aspectratio=&quot;t&quot; v:ext=&quot;edit&quot;&gt; &lt;/o:lock&gt;&lt;/v:path&gt;&lt;/v:stroke&gt;&lt;/v:shapetype&gt;&lt;v:shape id=&quot;_x0000_i1025&quot; style=&quot;width: 60.75pt height: 16.5pt&quot; type=&quot;#_x0000_t75&quot;&gt;
 &lt;v:imagedata chromakey=&quot;white&quot; src=&quot;file:///C:UsersMRS~1.NAZAppDataLocalTempmsohtmlclip1 1clip_image001.png&quot;&gt; &lt;/v:imagedata&gt;&lt;/v:shape&gt;&lt;/span&gt;&lt;span style=&quot;font-family: &quot;Times New Roman&quot;,&quot;serif&quot; font-size: 12pt&quot;&gt;&lt;font size=&quot;3&quot;&gt;&lt;font face=&quot;Times New Roman&quot;&gt;&lt;span style=&quot;mso-spacerun: yes&quot;&gt; &lt;/span&gt;parameters. There was no interaction of load
and group in this study. Also there was no difference between two groups at the
beginning of the test. &lt;o:p /&gt;&lt;/font&gt;&lt;/font&gt;&lt;/span&gt;&lt;/p&gt;&lt;font face=&quot;Times New Roman&quot; size=&quot;3&quot;&gt; &lt;/font&gt;&lt;p class=&quot;MsoNormal&quot; style=&quot;margin: 0in 0in 0pt text-align: justify line-height: normal text-justify: inter-ideograph tab-stops: right 7.3pt center 265.9pt&quot;&gt;&lt;b&gt;&lt;span style=&quot;font-family: &quot;Times New Roman&quot;,&quot;serif&quot; font-size: 12pt&quot;&gt;Conclusions: &lt;/span&gt;&lt;/b&gt;&lt;span style=&quot;font-family: &quot;Times New Roman&quot;,&quot;serif&quot; font-size: 12pt&quot;&gt;These data show
that wearing 10 kg of external weight in a waistcoat increases the postural
sway of subjects, which may in turn increase the likelihood of falls and
injury.&lt;o:p /&gt;&lt;/span&gt;&lt;/p&gt;&lt;font face=&quot;Times New Roman&quot; size=&quot;3&quot;&gt; &lt;/font&gt;</abstract>
	<keyword_fa>کنترل وضعیتی، کنترل حرکت، بار خارجی، کمردرد مزمن</keyword_fa>
	<keyword>Postural control, Motor control, Fatigue, CLBP</keyword>
	<start_page>49</start_page>
	<end_page>58</end_page>
	<web_url>http://rjms.iums.ac.ir/browse.php?a_code=A-10-1-1479&amp;slc_lang=fa&amp;sid=1</web_url>


<author_list>
	<author>
	<first_name>Hamid Reza</first_name>
	<middle_name></middle_name>
	<last_name> Mokhtarinia</last_name>
	<suffix></suffix>
	<first_name_fa> حمیدرضا</first_name_fa>
	<middle_name_fa></middle_name_fa>
	<last_name_fa> مختاری نیا</last_name_fa>
	<suffix_fa></suffix_fa>
	<email></email>
	<code>3900319475328460024455</code>
	<orcid>3900319475328460024455</orcid>
	<coreauthor>Yes
</coreauthor>
	<affiliation>University of Social Welfare Rehabilitation Science</affiliation>
	<affiliation_fa>دانشگاه علوم بهزیستی و توانبخشی، تهران</affiliation_fa>
	 </author>


	<author>
	<first_name>Mohammad Ali</first_name>
	<middle_name></middle_name>
	<last_name> Sanjari</last_name>
	<suffix></suffix>
	<first_name_fa>محمدعلی</first_name_fa>
	<middle_name_fa></middle_name_fa>
	<last_name_fa> سنجری</last_name_fa>
	<suffix_fa></suffix_fa>
	<email></email>
	<code>3900319475328460024456</code>
	<orcid>3900319475328460024456</orcid>
	<coreauthor>No</coreauthor>
	<affiliation>University of Social Welfare Rehabilitation Science</affiliation>
	<affiliation_fa>دانشگاه علوم بهزیستی و توانبخشی، تهران</affiliation_fa>
	 </author>


	<author>
	<first_name>Mohammad</first_name>
	<middle_name></middle_name>
	<last_name> Parnianpour</last_name>
	<suffix></suffix>
	<first_name_fa>محمد</first_name_fa>
	<middle_name_fa></middle_name_fa>
	<last_name_fa> پرنیانپور</last_name_fa>
	<suffix_fa></suffix_fa>
	<email></email>
	<code>3900319475328460024457</code>
	<orcid>3900319475328460024457</orcid>
	<coreauthor>No</coreauthor>
	<affiliation>Sharif University of Technology</affiliation>
	<affiliation_fa>دانشگاه صنعتی شریف، تهران</affiliation_fa>
	 </author>


</author_list>


	</article>
</articleset>
</journal>
