Feasibility and Reliability of Quadriceps Muscle Power and Optimal Movement Velocity Measurements in Different Populations of Subjects
This study aimed to assess the feasibility and reliability of quadriceps maximal short-term power (P ) and corresponding optimal movement velocity (υ -velocity at which the power reaches a maximum value) measurements in different populations of subjects. Five groups of subjects, fifty participants i...
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Veröffentlicht in: | Biology (Basel, Switzerland) Switzerland), 2024-02, Vol.13 (3), p.140 |
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Sprache: | eng |
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Zusammenfassung: | This study aimed to assess the feasibility and reliability of quadriceps maximal short-term power (P
) and corresponding optimal movement velocity (υ
-velocity at which the power reaches a maximum value) measurements in different populations of subjects. Five groups of subjects, fifty participants in each group, took part in the study: students; patients of the cardiac rehabilitation program; patients after stroke; older adults; and subjects of different ages who performed repetitive measurements with two different bicycles. The correlations calculated for the pairs of scores ranged from 0.93 to 0.99 for P
and from 0.86 to 0.96 for υ
(all with
< 0.001). Intraclass Correlations Coefficients (ICCs) varied from 0.93 to 0.98 for P
and from 0.86 to 0.95 for υ
. The standard error of measurement (SEM) varied from 16.9 to 21.4 W for P
and from 2.91 to 5.54 rotations(rot)/min for υ
. The coefficients of variation (CVs or SEM%) for P
and υ
in the stroke group were 10.6% and 11.4%, respectively; all other CVs were clearly lower than 10%. The minimal detectable change (MDC) varied from 46.6 to 59.3 W for P
and from 8.07 to 15.4 rot/min for υ
. MDC% varied from 9.53% to 29.3% for P
and from 8.19% to 31.7% for υ
, and was the highest in the stroke group. Therefore, the precision of measurements of P
and υ
was confirmed by very good indices of absolute and relative reliability. The proposed methodology is precise, safe, not time-consuming and feasible in older subjects and those with diseases. |
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ISSN: | 2079-7737 2079-7737 |
DOI: | 10.3390/biology13030140 |