Med Sci Sports Exerc 1996 Feb;28(2):218-24
High- and low-bar squatting techniques during weight-training.
Wretenberg P, Feng Y, Arborelius UP.
*** This study showed that there are major differences in muscle recruitment and joint torque between Weightlifting and Powerlifting squats. In particular, Weightlifters distribute the load more equally between hip and knee, whereas Powerlifters put relatively more load on the hip joint. The thigh muscular activity was found to be slightly higher for powerlifters. Note that Sumo style squats were not examined in this study, but it would probably have been found that this places even greater load on the hips as compared with the knees.
Eight Swedish national class weightlifters performed "high-bar" squats and six national class powerlifters performed "low-bar" squats, with a barbell weight of 65% of their 1 RM, and to parallel-and a deep-squatting depth. Ground reaction forces were measured with a Kistler piezo-electric force platform and motion was analyzed from a video record of the squats. A computer program based on free-body mechanics was designed to calculate moments of force about the hip and knee joints. EMG from vastus lateralis, rectus femoris, and biceps femoris was recorded and normalized. The peak moments of force were flexing both for the hip and the knee.
The mean peak moments of force at the hip were for the weightlifters 230 Nm (deep) and 216 Nm (parallel), and for the powerlifters 324 Nm (deep), and 309 Nm (parallel). At the knee the mean peak moments for the weightlifters were 191 Nm (deep) and 131 Nm (parallel), and for the powerlifters 139 Nm (deep) and 92 Nm (parallel). The weightlifters had the load more equally distributed between hip and knee, whereas the powerlifters put relatively more load on the hip joint. The thigh muscular activity was slightly higher for the powerlifters.
Si quelqu'un comprend quelque chose !
Le squat power place plus de stress sur les hanches alors que le full SQT se réparti entre les genoux et les hanches.
Par contre malgré que le squat power place bcp de stress sur les hanches, l'activité des cuisses est plus forte !!!
Ds le même registre on peut lire ailleur que le SQT // est mauvais pour les genoux car en demi-flexion une grosse partie de la charge est sur le genoux alors que le texte plus haut indique le contraire ??