Se hipotetiza el papel que juega la fascia toracolumbar, aspecto sobre el que ya estamos investigando.
Enhorabuena a todo el equipo.
Cortell-Tormo JM1, García-Jaén M, Chulvi-Medrano I, Hernández-Sánchez S, Lucas-Cuevas ÁG, Tortosa-Martínez J.
Influence Of Scapular Position On The Core Musculature Activation In The Prone Plank Exercise.
J Strength Cond Res. 2016 Oct 26. [Epub ahead of print]
Prone plank is a widely used exercise in core stability training. Research has shown that pelvic tilt plays an important role on the electromyographical (EMG) activation of core musculature. However, the influence of scapular position on EMG activation is currently unknown. Therefore, this study evaluated the influence of scapular position on the core muscles during a prone plank. Surface electromyography of the rectus abdominis (RA), external oblique (EO), internal oblique (IO) and erector spinae (ES) was collected in fifteen participants (10 men, 5 women). Four variations of the prone plank were evaluated: scapular abduction with anterior (ABANT) and posterior (ABRET) pelvic tilt; and scapular adduction with anterior (ADANT) and posterior (ADRET) pelvic tilt. Individual muscle EMG and overall EMG for each plank exercise was analyzed. Joint positions were controlled with a 2D kinematic analysis. Ratings of perceived effort (RPE) were also registered. ADRET resulted in higher overall EMG activity compared to ABANT (p=0.04) and ADANT (p=0.04). Moreover, ADRET resulted in greater EMG activity compared to ADANT, ABANT, and ABRET for EO (p=0.000; p=0.000; p=0.035), IO (p=0.000; p=0.000; p=0.005) and ES (p=0.019; p=0.001; p=0.014). Regarding RA, ADRET was significantly higher compared to ADANT (p=0.002) and ABANT (p=0.005). Finally, ADRET provoked a higher RPE compared to ABANT (p=0.000), ABRET (p=0.001) and ADANT (p=0.015). These findings demonstrate the influence of the scapular and pelvic position on the EMG response of the core muscle groups analyzed in this study, and highlight the greater contribution of these muscles to the postural stabilizing demands during posterior pelvic tilt positions, particularly when the scapulae are in adduction.
En las fotografías aparece un clara alteración en la posición escapular y pélvica entre las variantes. Quizá las progresiones técnicas de colocación postural puedan resultar más interesantes que añadir mayor carga (tiempo mantenido) o añadir inestabilidad.
P.D. En breve más.