en بهداشت Health تحقیقی Original article <p style="text-align: justify;"><span style="font-size:14px;"><span style="line-height:150%"><span sans-serif="" style="font-family:Calibri,"><b><i><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Background and objectives:</span></span></i></b><span style="line-height:150%"><span new="" roman="" style="font-family:" times=""> Aging is a natural phenomenon associated with a decrease in physical fitness factors and increases in chronic pain. The present study aimed to investigate the effect of High Interval Intensity Training (HIIT) and Moderate Intensity Continued Training (MICT) with Citrus Aurantium (CA) consumption on pain threshold and motor balance in elderly rats. </span></span></span></span><br> <span style="line-height:150%"><span sans-serif="" style="font-family:Calibri,"><b><i><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Material and Methods:</span></span></i></b><span style="line-height:150%"><span new="" roman="" style="font-family:" times=""> Forty-nine elderly rats were randomly divided into 1) control, 2) MICT, 3) HIIT, 4) MICT+CA, 5) HIIT+CA, 6) CA and 7) sham groups. Groups 3 and 5 performed HIIT at a speed of 25-25 m/min, and groups 2 and 4 performed MICT at a speed of 25-20 m/min; also, groups 4-6 received 300 mg/kg/day CA peritoneally. The pain and motor balance tests were evaluated using a hot plate and rotarod devices respectively. The Kolmogorov-Smirnov test was used to investigate the normal distribution of findings and one-way ANOVA with Tukey&rsquo;s post- hoc tests was used to analyze of findings (P&le;0.05).<b><i></i></b></span></span></span></span><br> <span style="line-height:150%"><span sans-serif="" style="font-family:Calibri,"><b><i><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Results: </span></span></i></b><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">CA, MICT, HIIT, MICT+CA, and HIIT+CA significantly increased pain threshold and motor balance (P<0.05); MICT+CA (P<0.05) and HIIT+CA (P<0.05) significantly increased pain threshold compared to CA, MICT, and HIIT, and HIIT+CA significantly increased pain threshold compared to MICT+CA (P<0.05). <b><i></i></b></span></span></span></span><br> <span style="line-height:150%"><span sans-serif="" style="font-family:Calibri,"><b><i><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Conclusion:</span></span></i></b><span style="line-height:150%"><span new="" roman="" style="font-family:" times=""> Although CA, MICT, and HIIT alone can enhance pain threshold and motor balance nevertheless it appears that MICT+CA and HIIT+CA have a better effect on the increase of pain threshold, so the effects of HIIT+CA can be higher than MICT+CA.</span></span><span style="line-height:150%"><span style="font-family:"Times New Roman","serif""></span></span></span></span></span><br> <br> <span style="font-size:11pt"><span style="line-height:115%"><span sans-serif="" style="font-family:Calibri,"><span style="font-size:9.0pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times=""><span style="color:red"></span></span></span></span></span></span></span></p> Aging,Citrus,Exercise,Pain Threshold,Rotarod Performance Test, 1 9 http://goums.ac.ir/jorjanijournal/browse.php?a_code=A-10-869-2&slc_lang=en&sid=1 Omidreza Salehi omidreza.67salehi@gmail.com 10031947532846007886 0000000153284658 Yes Department of Physical Education and Sport Sciences, University of Kurdistan, Sanandaj, Iran mayam kheirdeh kheirdeh.m@gmail.com 10031947532846007887 10031947532846007887 No Department of Physical Education, Sama Technical and Vocational College, Shiraz Branch, Islamic Azad University, Shiraz, Iran Fatemeh Farkhaie mohaddese2012@yahoo.com 10031947532846007888 10031947532846007888 No Department of Physical Education and Sport Sciences, Najaf Abad Branch, Islamic Azad University, Najaf Abad, Iran mehdi noura noora.mehdi@yahoo.com 10031947532846007889 10031947532846007889 No Department of Physical Education and Sport Sciences, Islamic Azad University, Shiraz Branch, Shiraz, Iran Rasoul Jamali Fashi jamali_cup@yahoo.com 10031947532846007890 10031947532846007890 No Department of Physical Education and Sport Sciences, Sama Technical and Vocational College, Varamin Branch, Islamic Azad University, Varamin, Iran Abdolali Rakhshanizadeh Aa.rakhshanizade@gmail.com 10031947532846007891 10031947532846007891 No Department of Physical Education and Sport Sciences, Payame Noor University, Iran