title: Standard and Short RoM Isokinetic Testing: Comparative Analysis in Identifying Submaximal Shoulder External Rotator Effort.
abstract: An isokinetic-related parameter termed the difference between eccentric-concentric strength ratios at two distinct test velocities (DEC) based on 60° (standard) range of motion (RoM) has been proven to be highly efficient detecting feigned muscular efforts. This study aimed to verify whether a DEC derived from a much shorter test RoM (20°) was equally useful than a long RoM-derived one. Eighteen healthy men (32.4 ± 6.4 years old) took part in a study focusing on shoulder external rotation isokinetic strength. Participants performed a genuine shoulder external rotator maximal effort (eight pairs of concentric and eccentric contractions at high and low velocities at short and long RoM) and then instructed to feign maximal effort. Contraction velocities were adjusted accordingly by applying a 1:4 gradient and peak moments registered. Both condition DEC was then calculated by subtracting the eccentric and concentric strength ratios at low velocities from those at high velocities. DEC scores in the feigned effort were significantly higher than maximal effort ones in both conditions in men. It enabled the setting of specific cutoff levels for separating the efforts. Both approaches revealed a coincident sensitivity (78%) whereas short RoM showed an even higher specificity: 88% versus 78%. Thus, the short RoM protocol provides clinically acceptable detection power.
authors.affiliation: a Department of Physical Medicine and Rehabilitation , Egarsat , Terrassa , Spain.
authors.forename: Eduard
authors.initials: E
authors.lastname: Pujol
authors.affiliation: a Department of Physical Medicine and Rehabilitation , Egarsat , Terrassa , Spain.|b EUSES-Bellvitge , Universitat de Girona, Universitat de Barcelona, ENTI , Barcelona , Spain.
authors.forename: Joaquim
authors.initials: J
authors.lastname: Chaler
authors.affiliation: a Department of Physical Medicine and Rehabilitation , Egarsat , Terrassa , Spain.
authors.forename: Laura
authors.initials: L
authors.lastname: Sucarrats
authors.affiliation: c Department of Physical Medicine and Rehabilitation , Consorci Sanitari Integral del Baix Llobregat, L'Hospitalet de Llobregat , Spain.
authors.forename: Inés
authors.initials: I
authors.lastname: López
authors.affiliation: d Department of Physical Medicine and Rehabilitation , Hospital Mútua de Terrassa , Terrassa , Spain.
authors.forename: Blanca
authors.initials: B
authors.lastname: Zeballos
authors.affiliation: a Department of Physical Medicine and Rehabilitation , Egarsat , Terrassa , Spain.|d Department of Physical Medicine and Rehabilitation , Hospital Mútua de Terrassa , Terrassa , Spain.
authors.forename: Roser
authors.initials: R
authors.lastname: Garreta
authors.affiliation: e Department of Physical Therapy , Sackler Faculty of Medicine, Tel Aviv University , Israel.
authors.forename: Zeevi
authors.initials: Z
authors.lastname: Dvir
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D006801:Humans; D008297:Male; D053581:Muscle Strength Dynamometer; D016059:Range of Motion, Articular / Q000502:physiology*; D012399:Rotation; D012680:Sensitivity and Specificity; D012785:Shoulder Joint / Q000502:physiology*; D055815:Young Adult
keywords: deception; isokinetic; muscle strength dynamometer; rotation; shoulder joint