Dynamic strength and endurance of the thigh muscles in patients with minimum sequel after ischaemic stroke

Abstract

Objective:

The aim was to assess the perceived motor impairment in patients with minimal or no overt motor symptoms after ischaemic stroke.

Study design:

Ten patients with stroke and 22 healthy subjects were investigated. The investigation included different tests, single maximal dynamic knee extensions and single dynamic knee flexions at different angular velocities, and an endurance test consisting of 100 maximal repeated dynamic knee extensions. The tests were performed using an isokinetic dynamometer with simultaneous surface electromyography registration. Peak torque of the mechanical performance, signal amplitude and mean frequency of the electromyography were determined for each contraction.

Results:

The peak torque values indicated that the patients with no overt motor deficits exhibited clear motor impairment in former affected limb. The two electromyography parameters indicated to some extent that also the so-called unaffected limb was affected.

Conclusions:

The tests used in the present study revealed impairments not clinically observed on routine clinical examination. These findings might be of importance in optimising the rehabilitation for the patients returning to various activities in their daily lives.