Ursula Kobryn

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During two-arm cranking in 5 groups of men (able-bodied and leg-disabled with different states of training; wheelchair-dependents with basket-ball training) the behaviour of parameters of the motor and cardiopulmonary system (iEMG, heart rate, oxygen uptake) was investigated. On the basis of stepwise increasing physical work up to exhaustion the group of(More)
Thirty untrained subjects (group 1: 10 ♀, 20–30 years; group 2: 10 ♀, 36–46 years; group 3: 10 ♂, 20–30 years) performed dynamic hand work on a hand-grip dynamometer at loads varying from 20 to 100% MVC and three different working frequencies (20, 40, and 60 cpm). The mechanical muscle activity, the iEMG and the R-R interval were measured throughout the(More)
In a model work place (hand-grip dynamometer), eleven subjects performed rhythmical hand-grip contractions to exhaustion (frequency 30/min). In each working cycle the contraction and rest phases were distinguished. The work to exhaustion was repeated four times (four working periods with 15-min rest intervals). The tests were performed at 40, 60, 80, 100%(More)
The experiments were carried out on 11 subjects ranging in the age from 23 to 37 years. Heart rate, integrated electrical activity from 4 muscles of the forearm and the hand and mechanical activity were measured simultaneously during rhythmical work using a hand-ergometer. The strength of the dynamic contractions was 20, 40, 60, 80 and 100% of a maximal(More)