Hip and thigh muscular activity in professional soccer players during an isometric squat with and without controlled hip contraction (Actividad muscular de cadera y muslo en jugadores de fútbol profesionales durante una sentadilla isométrica con y sin co

• Published in: Retos (Madrid) 2021-01, Vol.39 (39), p.697-704
• Main Authors: Rojas-Quinchavil, Gabriel, Venegas-Jeldrez, Pablo, Valencia, Oscar, Guzmán-Venegas, Rodrigo, Araneda, Oscar Florencio, Berral de la Rosa, Francisco José, Flores-Leon, Andres Felipe
• Format: Article
• Language: English
• Subjects: electromyography; hip; Isometric exercise; knee; soccer player; squat
• ISSN: 1579-1726; 1988-2041
• DOI: 10.47197/retos.v0i39.82024

  The purpose of the present investigation was twofold 1) To compare the hip and thigh muscular activity of professional soccer players when performing the isometric squat with and without controlled hip contraction; 2) To determine the muscular relationships that take place during these methods of execution of the exercise. Methods: 11 healthy male professional soccer players, randomly performed three modalities of isometric squat at a 60° knee flexion: conventional squat (SQ), squat with hip abduction contraction (SQ-ABD) and squat with hip adduction contraction (SQ-ADD), controlled at 70% of 1 maximum repetition. The activity of the gluteus medius (GM), tensor fasciae latae (TFL), vastus medialis (VM), vastus lateralis (VL), semitendinosus (ST) and biceps femoris (BF) was obtained through surface electromyography. Hip (GM/TFL), quadriceps (VM/VL) hamstrings (ST/BF), and hamstrings/quadriceps (H/Q) ratios were analyzed. Results: GM increases in SQ-ABD and SQ-ADD compared to SQ (p