OBJECTIVE The objective of this work is to present an objective, practical, and reproducible method for evaluating the functional limitation caused by occlusive arterial disease in upper limbs: a stress test using an isokinetic dynamometer. METHODS Twenty-three patients with unilateral subclavian artery occlusive disease were included in the study, forming group 1. Seven patients of similar a...

CONTEXT Isometric muscle strength of knee extensors has been assessed for estimating performance, evaluating progress during physical training, and investigating the relationship between isometric and dynamic/functional performance. OBJECTIVE To assess the validity and reliability of an adapted leg-extension machine for measuring isometric knee extensor force. DESIGN Validity (concurrent ap...

(1) BACKGROUND: studies with able-bodied athletes showed that performance might possibly be influenced by vitamin D status. Vitamin D seems to have a direct impact on neuromuscular function by docking on vitamin D receptors in the muscle tissue. Additionally, a high prevalence of vitamin D deficiency was shown not only in infants and in the elderly but also in healthy adults and spinal cord inj...

PURPOSE To examine the effects of resistance training (RT) on metabolic syndrome-related phenotypes in postmenopausal women. PATIENTS AND METHODS Twenty-two postmenopausal women (65.0±4.2 years) underwent 12 weeks of whole body progressive training with intensity prescribed based on rating of perceived exertion. Dominant knee extension strength was assessed using an isokinetic dynamometer bef...

The purpose of this study is to examine the relationship between isokinetic strengths, subjective knee scores, and functional performance in patients with an ACL-reconstructed knee. Methods: Fifty-five male patients between the ages of 16~53 years were enrolled in this study. At the time of testing, a mean 19.7 months had elapsed since the patients had received ACL reconstruction. Muscle streng...

BACKGROUND Isokinetic dynamometry is a useful tool to objectively assess muscle strength of children and adults in athletic and rehabilitative settings. This study examined test-retest reliability of isokinetic knee strength measurements in children aged 8 to 10 years and defined limits for the minimum difference (MD) in strength that indicates a clinically important change. HYPOTHESIS Isokin...

CONTEXT With regard to intermittent training exercise, the effects of the mode of recovery on subsequent performance are equivocal. OBJECTIVE To compare the effects of 3 types of recovery intervention on peak torque (PT) and electromyographic (EMG) activity of the knee extensor muscles after fatiguing isokinetic intermittent concentric exercise. DESIGN Crossover study. SETTING Research la...

Uncertainty exists as to whether a period of passive arterial occlusion (PAO) or ischemic exercise (IE) results in peak lower leg vascular conductance (LVC). This uncertainty is due to the different body positions, active muscle mass, and occlusion times used for PAO or IE. The purpose of this study was to examine whether 10 min of PAO elicits a similar LVC compared with ischemic dorsiflexion (...

In human physiology studies subjects are often asked to perform certain exercises, eg.knee extension or flexion,hip extension or flexion etc . Those experiments are split into several repetitions which might last just for few seconds. Therefore subjects need to motivated fast and reliably to perform a maximum extension or flexion. The standard procedure in those cases is however verbal motivati...

The purpose of this study was to determine the relationship between average force, average torque, peak force, and peak torque produced by the knee musculature. Twenty women were assessed for isokinetic concentric and eccentric knee extensor and flexor muscular strength at a velocity of 90 deg/sec. Correlational analyses showed relationships ranging from r = 0.89 to r = 0.94 for concentric exte...