期刊名称：Facta Universitatis : Series Physical Education and Sport
印刷版ISSN：1451-740X
出版年度：2009
卷号：7
期号：01
页码：37-43
出版社：University of Niš
摘要：The study compares parameters of balance after treadmill upslope and level running involving different form muscle contraction. A group of 14 PE students (age 19.2 ± 2.9 years, height 180.0 ± 7.3 cm, weight 69.2 ± 8.4 kg) underwent in different days two stepwise exercise bouts on the treadmill. In both cases, an initial intensity of 5.6 km/h was increased by 1.2 km/h every 1.5 minute up to a maximum. However, during uphill running the slope of the treadmill was 15%. Duration of level running was longer compared to upslope running, on average 10 and 14 min, respectively. Thirty second before and two minutes after exercises the COP velocity was registered at 100 Hz by means of posturography system FiTRO Sway check based on dynamometric platform. While exercising and standing on stabilographic platform cardiorespiratory parameters were monitored by means of breath-by-breath system Spiroergometry CS 200. As intended, there was no difference in the peak of ventilation after upslope and level running (149.3 ± 13.1 l/min and 146.7 ± 12.6 l/min, respectively). Likewise, both exercises elicited similar heart rate (190.0 ± 11.1 bpm and 182.2 ± 8.9 bpm, respectively). Also sway velocity in an initial 5-second period of recovery did not differ after both exercises (37.2 ± 3.8 mm/s and 34.7 ± 3.1 mm/s, respectively). However, its longer readjustment to pre-exercise level was observed after uphill running compared to flat running. These differences after about 50 seconds of recovery were even significant (p ≤ 0.05). In both cases the values did not resume to baseline within examined two minutes after exercises. It may be concluded that postural sway is only slightly higher after upslope than level running but its readjustment to pre-exercise is substantially slower. Such longer balance impairment may be attributed mainly to difference in unique properties of predominant concentric than eccentric contractions.
关键词：form of muscle contraction, level running, postural stability, upslope running
