Test–Retest Reliability of Functional Electromechanical Dynamometer on Five Sit-to-Stand Measures in Healthy Young Adults

Abstract

Background: The purpose of this study was to determine the reliability for the strength and movement velocity of the concentric phase from the five Sit-to-Stand (5STS), using three incremental loads measured by a functional electromechanical dynamometer (FEMD) in healthy young adults. Methods: The average and peak strength and velocity values of sixteen healthy adults (mean ± standard deviation (SD): age = 22.81 ± 2.13 years) were recorded at 5, 10 and 15 kg. To evaluate the reliability of FEMD, the intraclass correlation coefficient (ICC), standard error of measurement (SEM) and coefficient of variation (CV) were obtained. Results: Reliability was high for the 10 kg (CV range: 3.70–4.18%, ICC range: 0.95–0.98) and 15 kg conditions (CV range: 1.64–3.02%, ICC: 0.99) at average and peak strength, and reliability was high for the 5 kg (CV range: 1.71–2.84%, ICC range: 0.96–0.99), 10 kg (CV range: 0.74–1.84%, ICC range: 0.99–1.00) and 15 kg conditions (CV range: 0.79–3.11%, ICC range: 0.99–1.00) at average and peak velocity. Conclusions: The findings of this study demonstrate that FEMD is a reliable instrument to measure the average and peak strength and velocity values during the five STS in healthy young adults.

Relationship between Asymmetries and Functional Autonomy in Older Chilean Adults

“…The STS evaluates the functional capacity of LL [ 38 ]. In this context, the STS can be used as a functional field test to anticipate the risk of falls in older adults [ 29 ] to clinical pathologies [ 32 ].…”

“…The purpose of this test was to evaluate the functional capacity of the LL of the participants [ 38 ]. This test consists of standing up five consecutive times without assistance or resting the arms on support.…”

Effect of the environmental factor of coexistence on the physical condition of people with mild and moderate intellectual disabilities

“…FEMDs use a cable wound on a roller where a load cell detects the signal and transforms it using an analog‐to‐digital converter, allowing force control and recording. The main advantage of these systems for evaluating people with intellectual disabilities is the versatility in the muscular force control, both in concentric and eccentric phases of the movement, being able to reach extreme situations with minimal risk of injury (Jerez‐Mayorga et al, 2021). In this study, the FEMD system was used to assess: (i) static arm force (SAF), (ii) static leg force (SLF), and (iii) dynamic arm force (DAF).…”

Test–Retest Reliability of the Functional Electromechanical Dynamometer for Squat Exercise

“…On the other hand, unconstrained MIDs provide concentric or eccentric resistance to a free, multiarticular whole-body motion, using a cable or a rod without providing proximal stabilization [18]. The cable variant incorporates a spool around which a cable is a wound, such as the functional electromechanical dynamometer (FEMD) used in this study [19,20]. The rod-based variant has a rod that operates similar to an ordinary lever arm and turns around a single ball joint, which allows for free 3D motion, though with lesser flexibility compared with its cable-based counterpart [21].…”

“…Moreover, it has been shown to be a valid and reliable evaluation method [22,23]. This technology has been used to study the strength of different exercises and has obtained high-reliability values [20,[23][24][25][26]. However, the reliability of the squat has not been evaluated with this device.…”