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：02
页码：181-187
出版社：University of Niš
摘要：The study compares parameters of balance after different forms of resistance exercise and after voluntary hyperventilation. A group of 22 physical education students performed 20 squats, calf raises, biceps curls, and presses behind the neck with an additional load of 50 % 1 RM. Besides this, they hyperventilated for a time corresponding to the duration of the exercises. Thirty seconds prior to and two minutes after the exercises the velocity of the centre of pressure was registered at 100 Hz by means of a posturography system FiTRO Sway Check based on force platform. While exercising and standing on the platform, parameters of ventilation and heart rate were continuously monitored using a breath-by-breath system MMC Horizon Sensormedics. The results showed the highest increase in velocity of the centre of pressure after squats (16.4 ± 1.4 mm/s), followed by calf raises (15.2 ± 1.3 mm/s), voluntary hyperventilation (14.8 ± 1.2 mm/s), biceps curls (14.0 ± 1.1 mm/s), and presses behind the neck (13.6 ± 0.8 mm/s). Similarly, the highest ventilation was found after squats (59.1 ± 6.6 l/min), then after calf raises (48.2 ± 5.8 l/min), voluntary hyperventilation (44.1 ± 5.2 l/min), biceps curls (40.0 ± 4.6 l/min), and presses behind the neck (38.9 ± 3.8 l/min). In addition, the heart rate was the highest after squats (165.0 ± 7.2 beats/min), following by calf raises (135.0 ± 6.8 beats/min), biceps curls (129.2 ± 5.8 beats/min), presses behind the neck (125.1 ± 4.6 beats/min), and voluntary hyperventilation (117.2 ± 4.8 beats/min). Furthermore, a significant (p ≤ 0.01) increase to a pre-exercise level in all of the parameters (8.6 ± 0.2 mm/s, 12.3 ± 0.1 l/min, and 76.5 ± 1.8 beats/min, respectively) has been found. During the phase of recovery, there was a close correlation between sway velocity and ventilation after squats (r = 0.939), calf raises (r = 0.919), biceps curls (r = 0.896), and presses behind the neck (r = 0.889). It may be concluded that a more marked ventilation rather than fatigue is responsible for an impairment of balance after resistance exercises.
