en کنترل حرکتی و شاخه‌های وابسته بدان Motor Control and its Related Branches مقاله اصیل Original Article <div style="text-align: justify;"><span style="font-size:12px;"><span style="font-family:times new roman;"><strong>Background. </strong>Despite the increasing popularity of the snowboard, there is not scientific literature for sport performance indicators in this sport.<br> <strong>Objectives.</strong>&nbsp;To analyze the effects of jump difficulty on the final performance during snowboarding-slopestyle competition.<br> <strong>Methods. </strong>All competition sequences (n=214) from the 2014 Winter Olympic Games were analyzed. Of these, 123 were from the men&acute;s competition and 91 were from the women&acute;s competition. The interaction between the final score and number of rotations was calculated using regression models with quadratic or linear equations. All analyses were performed separately for women and men.<br> <strong>Results.</strong> Quadratic regression had better R²and mean absolute errors than linear regression. Linear and quadratic regressions showed that the number of rotations significantly predicts final score in men.&nbsp; However, in the women&acute;s competition, the curve of quadratic regression was almost identical to that from the linear regression.<br> <strong>Conclusion. </strong>These results have identified the importance of evaluating the jump difficulty versus its efficacy. Athletes and coaches have to weigh pros and cons of increasing the difficulty of jumps or improve jumps that are already fluent in order to master them.</span></span></div> Sport, Decisional Balance, Correlates, Elite, Jumps, Snowboard, Slopestyle 15 21 http://aassjournal.com/browse.php?a_code=A-11-722-1&slc_lang=en&sid=1 Jesús Muñoz suliwan@unex.es 10031947532846007078 10031947532846007078 No Faculty of Sports Science, University of Extremadura, Cáceres, Spain. Facultad de Educación, Universidad Autónoma de Chile, Santiago de Chile, Chile Javier García-Rubio javiergarciarubio@gmail.com 10031947532846007079 10031947532846007079 No Facultad de Educación, Universidad Autónoma de Chile, Santiago de Chile, Chile David Ramos david_isspro@hotmail.com 10031947532846007080 10031947532846007080 No Faculty of Sports Science, University of Extremadura, Cáceres, Spain Kiko León fleon@unex.es 10031947532846007081 10031947532846007081 No Faculty of Sports Science, University of Extremadura, Cáceres, Spain Daniel Collado-Mateo danicolladom@gmail.com 10031947532846007082 10031947532846007082 Yes Faculty of Sports Science, University of Extremadura, Cáceres, Spain