Authors R.Y. Nikolaev, A.A. Melnikov, A.V. Borisov
Month, Year 10, 2014 @en
Index UDC 612.886
Abstract The influence of two maximal anaerobic exercises on the leg muscles (thigh abductors and bicycle exercise) involved in maintaining the balance in the frontal and sagittal plane were investigated in young adults (n = 18). Test persons carried out maximal test (30 sec, 5 watts per kilogram of body weight) on a bicycle ergometer «Monark 828E» and after a period of rest legs abduction apart with weights 0.5 kg left (left leg, 30 seconds) and right (right leg, 30 s). Postural stability was studied by stabilography (Stabilan-1–02, OKB "Ritm"). It was found that the average linear velocity of the pressure fluctuations center in the frontal and the sagittal plane increased equally after the maximal bicycle exercise (30 sec Wingate test) and after the thigh abductor exercise test (60 sec). However, the degree of linear velocity increase was higher in the sagittal plane (p = 0.043) after the bicycle exercise, and linear velocity in the frontal plane became slightly higher (p <0.1) after the thigh abduction exercise. Variance of oscillations in the sagittal plane was increased to the same extent after both types of exercises, but variance of oscillations in the frontal plane was significantly increased (p<0,05) after the thigh abductors exercise compared to the Wingate test. Thus, the maximum load on the postural muscles causes a significant decrease in the postural stability in the sagittal direction, and also a greater stress of postural control system. Specificity of muscle activity has a significant impact on the characteristics of postural stability in key areas.

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Keywords Postural control; stabilography; exercise; fatigue.
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