Sport Sciences Research Institute Studies in Sport Medicine 2322-1658 14 31 2022 04 21 The effect of changes in pedal width on the frontal plane knee kinematics in cyclists with different Q angles The effect of changes in pedal width on the frontal plane knee kinematics in cyclists with different Q angles 139 160 3148 10.22089/smj.2022.11788.1548 FA Mohammad Amin Mohammadian Department of Pathology and Sport Biomechanics, Faculty of Physical Education and Sports Sciences, Kharazmi University, Tehran, Iran 0000-0001-7150-364X Ali Abbasi Department of Pathology and Sport Biomechanics, Faculty of Physical Education and Sports Sciences, Kharazmi University, Tehran, Iran 0000-0001-9733-6501 Mehdi Khaleghi Tazji Department of Pathology and Sport Biomechanics, Faculty of Physical Education and Sports Sciences, Kharazmi University, Tehran, Iran 0000-0002-3043-3961 Journal Article 2021 11 22 The aim of this study was to investigate the effect of changes in pedal width (Q Factor) on knee frontal plane kinematics in cyclists with different Q angles. Three groups of 8 road cyclists (1- Low Q angle, 2- Normal Q angle and 3- High Q angle) cycled in four different pedal widths of 16, 19, 22 and 25 cm. The variables of maximum abduction, maximum adduction, range of motion and mean abduction/adduction angle of the knee joint during cycling were calculated. The results showed that there was significant difference between group 1 and group 3 in the variables of maximum, minimum and mean abduction angle of the knee joint. Also, the effect of changing in the Q Factor was significant on the variables of maximum, minimum and mean abduction of the knee joint. in all variables, the interaction effect between inter-group and between-group factor was not significant. The results of the present study showed that the difference in the Q angle of individuals and also the increase in pedal width affect the frontal plane knee joint kinematics; Therefore, in choosing the appropriate pedal width for cyclists, the difference in their Q angle should be considered. The aim of this study was to investigate the effect of changes in pedal width (Q Factor) on knee frontal plane kinematics in cyclists with different Q angles. Three groups of 8 road cyclists (1- Low Q angle, 2- Normal Q angle and 3- High Q angle) cycled in four different pedal widths of 16, 19, 22 and 25 cm. The variables of maximum abduction, maximum adduction, range of motion and mean abduction/adduction angle of the knee joint during cycling were calculated. The results showed that there was significant difference between group 1 and group 3 in the variables of maximum, minimum and mean abduction angle of the knee joint. Also, the effect of changing in the Q Factor was significant on the variables of maximum, minimum and mean abduction of the knee joint. in all variables, the interaction effect between inter-group and between-group factor was not significant. The results of the present study showed that the difference in the Q angle of individuals and also the increase in pedal width affect the frontal plane knee joint kinematics; Therefore, in choosing the appropriate pedal width for cyclists, the difference in their Q angle should be considered. https://smj.ssrc.ac.ir/article_3148_d87c68a56bc8eb803b44f25abb627786.pdf