A DYNAMOMETER FOR EVALUATION OF DYNAMIC MUSCLE WORK

被引:165
作者
BOSCO, C
BELLI, A
ASTRUA, M
TIHANYI, J
POZZO, R
KELLIS, S
TSARPELA, O
FOTI, C
MANNO, R
TRANQUILLI, C
机构
[1] UNIV ROMA TOR VERGATA,FAC MED & SURG,DEPT PHYS MED & REHABIL,ROME,ITALY
[2] FAC MED LYON SUD,PHYSIOL GIP EXERCISE LAB,LYON,FRANCE
[3] FIDAL,ITALIAN TRACK & FIELD ASSOC,ROME,ITALY
[4] DSHS,INST BIOMECH,COLOGNE,GERMANY
[5] ARISTOTELIAN UNIV THESSALONIKI,DEPT PHYS EDUC & SPORT SCI,THESSALONIKI,GREECE
[6] CONI,INST SPORT SCI,ROME,ITALY
来源
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY AND OCCUPATIONAL PHYSIOLOGY | 1995年 / 70卷 / 05期
关键词
DYNAMIC DYNAMOMETER; GRAVITATIONAL LOADS; FORCE-VELOCITY RELATIONSHIP; MUSCLE POWER; MUSCLE SEX DIFFERENCE;
D O I
10.1007/BF00618487
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
The validation of a new dynamometer for evaluation of dynamic muscle work is presented. The device was based on a precise measurement of load displacements of any machine using gravitational loads as external resistance. It allowed, through a sensor consisting of an infrared photo interrupter, the calculation of velocity, force and power during concentric, eccentric and stretch-shortening cycle activity. To validate the dynamometer 33 male and female track and field athletes (12 throwers and 21 jumpers) participated in the study. The throwers (4 women and 8 men) were asked to perform half-squat exercises on a slide machine with a load of 100% of the subject's body mass. The day-to-day reproducibility of half-squat exercises gave a correlation coefficient of r = 0.88, 0.97 and 0.95 for average push-off force (AF), average push-off velocity (AV), and average push-off power (AP) respectively. Comparison of half-squat measurements was performed against jumping and running test evaluation by the jumpers (7 women and 14 men). The interrelationships among the different variables studied demonstrated a strong correlation between AF, AV and AP and sprinting and jumping parameters (r = 0.53-0.97; P < 0.05-0.001). Using values of AF, AV and AP developed in half-squat exercises executed with different loads, ranging from 35% to 210% of the subject's body mass, it was also possible to establish the force-velocity and power-velocity relationships for both male and female jumpers. In any individual case, the maximal error due to the measurement system was calculated to be less than 0.3%, 0.9% and 1.2% for AF, AV, and AP respectively. Given the accuracy of the ergometer, the high reliability found between 2 days of measurements, and the specificity of the results it is suggested that the dynamic dynamometer would be suitable for evaluation of athletes performing specific skills. In addition, because single and multiple joint movements involving appropriate muscle groups call be easily performed, physiological characteristics could be evaluated for both athletic and rehabilitation purposes. Therefore, because of its simplicity of use and application, and its low cost the dynamometer would be suitable for both laboratory and field conditions.
引用
收藏
页码:379 / 386
页数:8
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