Joanna Kostka, Andżelika Fajkowska, Elżbieta Miller

J. Kostka, A. Fajkowska, E. Miller – The impact of stroke on the power and shortening velocity of the muscles – preliminary report. FP 2017; 17(2); 16-22

Abstract

Aim: The aim of the study was to determine the difference in power and muscles shortening velocity in patients with a history of stroke and those who have not undergone a stroke as well as to evaluate the determinants of the power and muscles shortening velocity.
Material and Methods: A total of 62 people were enrolled in the study, including 31 patients (9 women and 22 men) after stroke hospitalized in Neurological Rehabilitation Department and 31 people matched for age and sex who did not suffer a stroke. Personal, anthropometric and diseases related data were collected. Muscle power (Pmax) and optimal shortening velocity of the muscles (Vopt) were evaluated by performing two 8-second tests on a Monark type bicycle ergometer.
Results: A significant difference in Pmax and Vopt between groups (p < 0.001) was noted. The average Pmax score in stroke patients was 211.22 W ±134.12, and in the control group 378.76 W ±167.52, and Vopt respectively 58.48 ±18.53 and 78.41 ±17.8 rep./ min. Relationship between age and Pmax as well as Vopt was also obtained.
Conclusions: Stroke reduces power and muscle shortening velocity. Power deficit in relation to people who have not suffered a stroke is over 44%, and velocity rate over 25%. The Pmax and Vopt level are affected by age.

Key words:
hemiplegia, muscles, power, shortening velocity

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