期刊名称：Facta Universitatis : Series Physical Education and Sport
印刷版ISSN：1451-740X
出版年度：2010
卷号：8
期号：02
出版社：University of Niš
摘要：The vertical jump is designed to assess the functional performance of the lower extremity (-ies) in both health and injured individuals. The "Myotest" (Myotest SA, Sion, Switzerland), as an instrument, gives us the technology and methodology to assess the abovementioned performance. The "Spinal Mouse" (Quantum Health and Wellness Ltd, Wallasay, England) instrument gives us the technology and methodology to assess postural status, i.e. for the spinal examination of the participants. AIMS: The aims of the actual research were to determine and quantify the variables of explosive strength of the lower extremities and the sagittal postural status of the participants, to determine if there is a significant difference between the variables of explosive strength of the lower extremities, to determine if there is a significant difference between the variables of sagittal postural status, as well as to determine if there is a correlation between the variables of explosive strength of the lower extremities and the variables of sagittal postural status. Nine participants involved in different sport activities constituted the sample, with a body height of 178,00±11,36 in cm, weight of 77,00±13,95 in kg and age of 22,89±1,62 years (Mean±St.Dev.). For the purpose of explosive strength assessment, the participants performed five vertical jumps (CMJ), by using three different protocols of maximum vertical displacement: 1) with a takeoff on the left leg; 2) with a takeoff on the right leg; 3) with a takeoff on both feet. For the purpose of the spinal examination, the participants were positioned in normal standing position. The descriptive statistics showed that the highest values among all the variables of explosive strength were obtained after the CMJ protocol was performed with a takeoff on two feet. In the case of the spinal examination, the descriptive statistics showed a large number of postural deformities. In the case of the correlation between explosive strength and the postural status of the participants, a significant correlation was determined only between certain variables of explosive strength obtained after both CMJ protocols with a takeoff on one leg (left or right) and certain variables of sagittal postural status. The modern way of life strongly influences postural status. When, e.g., the decrease in lumbar lordosis is not followed by an adequate decrease in thoracic kyphosis, the pelvis needs to compensate, ie. change the inclination. If the mentioned compensation is not enough to keep a balanced position of the CG, the patients change the angle in the knee joints. The fact that a correlation between certain variables of explosive strength and certain variables of sagittal postural status was determined, led the authors to the conclusion that a larger sample of participants could point to a more significant correlation. The obtained results could be useful to the participants of the actual research, and all other patients in achieving their goals, which are proper sagittal postural status and adequate muscular potential of lower extremities by application of regular physical activity, and appropriate corrective exercises, determined by experts in the domain of corrective gymnastics.
