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RISS 인기검색어
- 검색키워드
- 저자 : ( Erika Zemkova ) (검색결과 5 건)
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( Erika Zemkova ),( Dusan Hamar ) 한국스포츠정책과학원(구 한국스포츠개발원) 2007 International Journal of Applied Sports Sciences Vol.19 No.2
This study compares the parameters of balance after lower limbs resistance exercise performed under the influence of proprioceptive stimulation and those under normal conditions. A group of 24 physical education students underwent in different days 6 sets of 6 semi squats performed with an additional load of 75% of body weight (each session was separated by 2 min of rest) either under normal conditions or under the influence of proprioceptive stimulation. Vertical counter shocks (frequency10 Hz, amplitude 3 mm) were applied by means of a special platform. One minute prior to and two minutes after exercise the velocity of the centre of pressure (COP) was registered at 100 Hz using stabilographic system FiTRO Sway check based on dynamometric platform. The results showed a significantly (p<0.01) higher increase in velocity of the COP immediately after squats performed under the influence of proprioceptive stimulation (from 6.8 ± 1.1 to 11.8 ± 1.4 mm/s) as compared to those under normal conditions (from 6.9 ± 1.2 to 9.8 ± 1.2 mm/s). However, in both cases its values returned to pre exercise level within 70 seconds. It may be concluded that additional proprioceptive stimulation enhances an acute effect of lower limbs resistance exercise on the parameters of balance.
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Postural Sway Response to Exercise: The Effect of Intensity and Duration
( Erika Zemkova ),( Dusan Hamar ) 한국스포츠정책과학원(구 한국스포츠개발원) 2005 International Journal of Applied Sports Sciences Vol.17 No.1
The study examined the effect of fatigue and hyperventilation induced by exercise bouts of different intensity and duration on postural stability. A group of physical education students underwent two exercises on the cycle ergometer, one for abrupt maximal and one for prolonged moderate exercises in different days. One minute prior to and four minutes after the exercises stabilographic parameter (mean velocity of the centre of pressure) was registered at 100 Hz by means of dynamometric platform based on the posturography system FiTRO Sway check. Results showed significantly (p < .01) higher increase in velocity of the centre of pressure immediately after the short-term maximal exercise (from 6.8 to 25.4 mm/s) than after longer exercise of moderate intensity (from 6.9 to 12.4 mm/s). However, during recovery those values resumed back to the baseline more rapidly following short, highly intensive exercise as compared to less intensive longer exercise. It may be concluded that, in early phase of recovery, abrupt maximal exercise has more profound but shorter detrimental effect on parameters of balance than longer exercise of moderate intensity. It appears that such an impairment of postural stability after short-term, high-intensity exercise is mediated mainly by hyperventilation, whereas more pronounced fatigue induced by prolonged exercise of moderate intensity is responsible for longer balance disorders.
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The Effect of Proprioceptive Stimulation of Different duration on Static and Dynamic Balance
( Erika Zemkova ),( Dusan Hamar ) 한국스포츠정책과학원(구 한국스포츠개발원) 2008 International Journal of Applied Sports Sciences Vol.20 No.1
The study evaluates the effect of proprioceptive stimulation of the same frequency and amplitude, but of different duration, on parameters of static and dynamic balance. A of 9 physical education students stand in random order in different days on a vibrating platform for a duration of 15, 60, 180, and 360 seconds. One minute prior to and one (in case of 15 and 60 seconds trials) and three minutes (in case of 180 and 360 seconds trials) after proprioceptive stimulation the velocity of the centre of pressure (COP) was registered at 100 Hz by means of the stabilography system FiTRO Sway check based on dynamometric platform. Vertical counter shocks (frequency 10 Hz, amplitude 3 mm) were applied by means of a special platform. Results showed no significant changes in COP registered in static conditions immediately after 15 and 60 seconds of proprioceptive stimulation. However, its values significantly increased after 180 and 360 seconds of such stimulation. On the other hand, in dynamic conditions the COP significantly decreased after 15, 60, 180, and 360 seconds of proprioceptive stimulation. It may be concluded that prolonged proprioceptive stimulation applied to lower limbs leads to an impairment of static balance, however it facilitates dynamic balance adjustment leading to temporary improvement. In both cases such effects become more pronounced as duration of stimulation increases.
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Postural Sway Response to Different Forms of Resistance Exercise
Erika Zemkova 체육과학연구원 2009 International Journal of Applied Sports Sciences Vol.21 No.2
The study provides an overview of our investigations on the effect of different forms of resistance exercise on postural stability. Prior to, during, and after exercises the COP velocity was registered at 100 Hz by means of posturography system FiTRO Sway check based on dynamometric platform. It has been found that postural sway response to resistance exercise depends on 1) its intensity (additional load used), 2) rate of movement, 3) number of repetitions and sets, 4) muscle mass activated, 5) intensity of proprioceptive stimulation, and 6) type of exercise.
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Balance Readjustment after Different Forms of Exercise: A review
( Erika Zemkova ) 한국스포츠정책과학원(구 한국스포츠개발원) 2009 International Journal of Applied Sports Sciences Vol.21 No.1
The study provides a review of our investigations on the effect of different forms of exercise on postural stability. Our findings showed that postural sway response to exercise depends on its type, intensity, and duration, however further studies are needed to investigate the role of different forms of muscle contraction and different activation of muscle fibers in its changes after exercise. As a possible physiological mechanisms of post-exercise balance impairment the following may be considered: fatigue, hyperventilation, deterioration of cutaneous, proprioceptive, vestibular, and visual inputs, muscle damage, dehydration, hyperthermia, dizziness, and so forth. In sports where impaired balance resulting from exercise may adversely affect the performance, both the magnitude of balance impairment in an initial phase of recovery and the speed of its readjustment should be taken in account. In theory, a decline of sway variables during recovery may be divided into three phases reflecting the effect of exercise on postural stability.
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