This article examines the factors involved in learning combat sports based on an observational study of technical errors and their relationships. We focus on the implementation of the technical model of one of the throws of judo (O Goshi)<\/em> using a sample of 55 students on the Bachelor of Science in Sport and Physical Activity at the University of Vigo over five academic years. To that end we carried out observational analysis using an observation instrument (SOBJUDO-OG) and a recording instrument (Match Vision Studio Premium v.1.0. software<\/em>). The results, reached using descriptive statistics and sequential analysis with T-Patterns<\/em> obtained using the Theme 5.0 software<\/em> program, confirm that the lack of bend in the legs leads to an absence of load of the opponent\u2019s body \u2013 Uke<\/em> \u2013 on the hip of the judoka carrying out the throw \u2013 Tori<\/em> \u2013 and that lack of initial disequilibrium with both arms, or separation of the rear of the left iliac crest of the Tori on the front of the left half of the Uke\u2019s<\/em> body also leads to the absence of this load.<\/p>\n\n