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Titolo:
TORQUE, WORK AND EMG DEVELOPMENT IN A HEEL-RISE TEST
Autore:
OSTERBERG U; SVANTESSON U; TAKAHASHI H; GRIMBY G;
Indirizzi:
GOTHENBURG UNIV,DEPT REHABIL MED,GULDHEDSGATAN 19 S-41345 GOTHENBURG SWEDEN GOTHENBURG UNIV,DEPT REHABIL MED S-41345 GOTHENBURG SWEDEN
Titolo Testata:
Clinical biomechanics
fascicolo: 4-5, volume: 13, anno: 1998,
pagine: 344 - 350
SICI:
0268-0033(1998)13:4-5<344:TWAEDI>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
STRETCH-SHORTENING CYCLE; FREQUENCY-SPECTRUM; PLANTAR FLEXION; MUSCLE; POTENTIATION; CONTRACTIONS; FATIGUE; YOUNG; WOMEN;
Keywords:
MEAN POWER FREQUENCY; ROOT-MEAN-SQUARE; CALF MUSCLE; FATIGUE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
U. Osterberg et al., "TORQUE, WORK AND EMG DEVELOPMENT IN A HEEL-RISE TEST", Clinical biomechanics, 13(4-5), 1998, pp. 344-350

Abstract

Objective. To study the fatigue process in the calf muscle during a standing heel-rise test. Design. Heel-rises were performed on a force plate measuring development of torque in the ankle joint. Background. The heel-rise test is a commonly employed clinical test to evaluate thefunction of the calf muscle by counting the number of heel-rises before exhaustion. Development of fatigue during other eccentric-concentric actions has earlier been studied as decreases in force, work and EMG. Methods. Ten healthy males (mean age 25 yr) participated in the study. Torque and work were calculated using measurements from a force plate. Mean power frequency and root-mean-square of the EMG in the triceps surae were evaluated separately in the eccentric and concentric phases. Results. Increases of mean torque during both the eccentric and concentric phases were found. Work performed decreased during the concentric phases due to decreased range of motion. No changes in root-mean-square and decreases in mean power frequency during the concentric phases indicated development of muscular fatigue, whereas decreases in both root-mean-square and mean power frequency during the eccentric phases indicated decreasing muscular activity. Conclusions. Accordingly, the limiting factor for the heel-rise test was not loss of muscle forceat the range of motion used, but rather a failure to maintain the initial range of motion owing to muscle fatigue.

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Documento generato il 30/05/20 alle ore 15:02:22