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Titolo:
A DYNAMOMETER FOR EVALUATION OF DYNAMIC MUSCLE WORK
Autore:
BOSCO C; BELLI A; ASTRUA M; TIHANYI J; POZZO R; KELLIS S; TSARPELA O; FOTI C; MANNO R; TRANQUILLI C;
Indirizzi:
HUNGARIAN UNIV PHYS EDUC,DEPT EXERCISE PHYSIOL,ALKOTASU 44 H-1123 BUDAPEST HUNGARY UNIV ROMA TOR VERGATA,FAC MED & SURG,DEPT PHYS MED & REHABIL ROME ITALY FAC MED LYON SUD,PHYSIOL GIP EXERCISE LAB LYON FRANCE FIDAL,ITALIAN TRACK & FIELD ASSOC ROME ITALY DSHS,INST BIOMECH COLOGNE GERMANY ARISTOTELIAN UNIV THESSALONIKI,DEPT PHYS EDUC & SPORT SCI THESSALONIKI GREECE CONI,INST SPORT SCI ROME ITALY
Titolo Testata:
European journal of applied physiology and occupational physiology
fascicolo: 5, volume: 70, anno: 1995,
pagine: 379 - 386
SICI:
0301-5548(1995)70:5<379:ADFEOD>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
FIBER COMPOSITION; EXTENSOR MUSCLES; FORCE-VELOCITY; POWER; PERFORMANCE; MOVEMENT; MEN;
Keywords:
DYNAMIC DYNAMOMETER; GRAVITATIONAL LOADS; FORCE-VELOCITY RELATIONSHIP; MUSCLE POWER; MUSCLE SEX DIFFERENCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
C. Bosco et al., "A DYNAMOMETER FOR EVALUATION OF DYNAMIC MUSCLE WORK", European journal of applied physiology and occupational physiology, 70(5), 1995, pp. 379-386

Abstract

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 validatethe 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 tothe 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.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/10/20 alle ore 12:34:08