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Titolo:
Measurement of maximal power output in isokinetic and non-isokinetic cycling. A comparison of two methods
Autore:
Baron, R; Bachl, N; Petschnig, R; Tschan, H; Smekal, G; Pokan, R;
Indirizzi:
Univ Vienna, Inst Sports Sci, Dept Prevent & Rehabil & Sports Med, A-1150 Vienna, Austria Univ Vienna Vienna Austria A-1150 l & Sports Med, A-1150 Vienna, Austria Univ Vienna, Inst Sports Sci, Dept Exercise Physiol, A-1150 Vienna, Austria Univ Vienna Vienna Austria A-1150 ercise Physiol, A-1150 Vienna, Austria Donau Hosp, Inst Phys Med & Rehabil, Vienna, Austria Donau Hosp Vienna Austria osp, Inst Phys Med & Rehabil, Vienna, Austria
Titolo Testata:
INTERNATIONAL JOURNAL OF SPORTS MEDICINE
fascicolo: 8, volume: 20, anno: 1999,
pagine: 532 - 537
SICI:
0172-4622(199911)20:8<532:MOMPOI>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
TORQUE-VELOCITY RELATIONSHIP; TERM DYNAMIC EXERCISE; MUSCLE; ERGOMETER; FATIGUE; FORCE; METABOLISM; HUMANS; SINGLE; TESTS;
Keywords:
isokinetic cycling; force-velocity test; optimal velocity; maximal power; limb symmetry-index;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Baron, R Univ Vienna, Inst Sports Sci, Dept Prevent & Rehabil & Sports Med, Schmelz, A-1150 Vienna, Austria Univ Vienna Schmelz Vienna Austria A-1150 A-1150 Vienna, Austria
Citazione:
R. Baron et al., "Measurement of maximal power output in isokinetic and non-isokinetic cycling. A comparison of two methods", INT J SP M, 20(8), 1999, pp. 532-537

Abstract

The main goal of the study was to compare maximal power output and power output at different pedalling frequencies obtained during isokinetic all-outtests with maximal power output obtained during a single all-out sprint (against the same braking force for every subject). Sixty healthy male subjects participated in the study. The ergometer system used in this study has three operating modes: the isokinetic mode (maintaining pedal crank velocityconstant at a present level), a revolution dependent mode and a revolutionindependent mode. In all three operating nodes the effective forcer are monitored by means of strain gauge, All subjects performed a single all-out sprint against a braking force of 20 Newton and an all-out isokinetic cycling test consisting of ten 10 s bouts of maximal cycling at speeds ranging from 50 rpm to 140 rpm. In both tests, irrespective of which test mode was used, the mean power for a complete crank revolution showed parabolic relationships to crank velocity. For the isokinetic test, the subjects showed a peak power (IsoW(peak)) of 15.3 +/- 1.7 W/kg corresponding to an optimal velocity of 115 +/- 8.6 rpm. For the force-velocity test NonisoW(peak) (the highest power obtained at any time during the test) was 14.4 +/- 1.9 W/kg and was achieved at a pedalling rate of 127 +/- 14 rpm. IsoW(peak) was significantly higher than NonisoW(peak) (p < 0.001) but there were no significant differences between NonisoW(peak) and IsoW(max) (maximal mean power for eachfull crank revolution) for the revolutions from 90 rpm to 140 rpm. Though,NonisoW(peak) and IsoW(peak) are significantly different, there was a strong relationship between NonisoW(peak) and IsoW(peak) (r = 0.7158, p < 0.001). There was also a strong relationship between NanisoW(peak) and IsoW(max)for the revolutions from 50 rpm to 120 rpm (p < 0.001) and at 130 rpm (p <0.01).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 14:26:23