Estudio sobre sentadilla

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Bueno para los que no saben ingles acá va el resumen. Este estudio midió el efecto de la profundidad de la sentadilla y la activicación (usando EMG) sobre 4 músculos Vastus Lateralis, Bicep femoralis, gluteus maximus y vastus medialis. Se usaron 10 experimentados levantadores y se hicieron pruebas aleatorias en sentadillas con 3 grados de profundidad: parcial, paralela y profunda.
Los resultado mostraron significativas diferencias en la contribución relativa del gluteus maximus durante la fase concentrica: sentadilla parcial (16.9%), sentadilla paralela (28%) y sentadilla profunda (35.4%). No hubo diferencias significativas entre la contribución relativa de el Vastus Lateralis, Bicep femoralis y vastus medialis en las diferentes profundidades de sentadillas. Por consiguiente los resultados sugieren que el Gluteus maximus mas que Vastus Lateralis, Bicep femoralis y vastus medialis se vuelve mas activo en la contracción concentrica a medida que se incrementa la profundidad de la sentadilla.

The Journal of Strength and Conditioning Research: Vol. 16, No. 3, pp. 428–432.
The Effect of Back Squat Depth on the EMG Activity of 4 Superficial Hip and Thigh Muscles
ANTHONY CATERISANO, RAYMOND F. MOSS, THOMAS K. PELLINGER, KATHERINE WOODRUFF, VICTOR C. LEWIS, WALTER BOOTH, and TARICK KHADRA

The Department of Health and Exercise Science, Furman University, 3300 Poinsett Highway, Greenville, South Carolina 29613

ABSTRACT

The purpose of this study was to measure the relative contributions of 4 hip and thigh muscles while performing squats at 3 depths. Ten experienced lifters performed randomized trials of squats at partial, parallel, and full depths, using 100–125% of body weight as resistance. Electromyographic (EMG) surface electrodes were placed on the vastus medialis (VMO), the vastus lateralis, (VL), the biceps femoris (BF), and the gluteus maximus (GM). EMG data were quantified by integration and expressed as a percentage of the total electrical activity of the 4 muscles. Analysis of variance (ANOVA) and Tukey post hoc tests indicated a significant difference (p < 0.001*, p = 0.056**) in the relative contribution of the GM during the concentric phases among the partial- (16.9%*), parallel- (28.0%**), and full-depth (35.4%*) squats. There were no significant differences between the relative contributions of the BF, the VMO, and the VL at different squatting depths during this phase. The results suggest that the GM, rather than the BF, the VMO, or the VL, becomes more active in concentric contraction as squat depth increases.

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Gracias por el aporte.