Article

The aim of this study was to assess the performance of prediction
rules meant for declaration of efforts as being maximal or not during isokinetic
strength testing in a cohort that underwent anterior cruciate ligament
reconstruction. DESIGN: Thirty-six individuals performed four sets of six
reciprocal concentric knee extension/flexion repetitions at a testing speed of 60
degrees per second through a 60-degree range of motion. The sets consisted of a
maximal voluntary effort, two nonmaximal sincere efforts at 50% and 75% of
self-perceived maximum, and a set attempting to feign or exaggerate thigh muscle
strength deficiencies. Strength curve derived set internal consistency measures,
namely, cross-correlation and percent root mean square difference scores, were
inputted into the prediction rules, whose performance is reported as specificity
and sensitivity percentages. RESULTS: Dependent on the prediction rule used and
when expressed on an individual participant basis, the corresponding specificity
and sensitivity values ranged from 66.6% to 97.2% and 97.2% to 94.4%,
respectively. CONCLUSIONS: Using the prediction rules presented in this
investigation, clinicians may be able to ascertain maximal effort production
during isokinetic testing in those who have undergone surgical reconstruction of
their anterior cruciate ligament.

Langue : ANGLAIS