Reliability and Validity of the Linear Transducer "ADR Encoder" for Measuring Power and Speed of the Sit-to-Stand Tests in Older Adults.

ABSTRACT: Background/Objectives: Lower-limb muscle function is traditionally assessed with tests like the five times sit-to-stand test (5STS) and the 30-s chair stand test (30CS). The ADR Encoder, a linear transducer, measures power and velocity during the sit-to-stand test. This study aimed to validate its use as functional indicators of muscle function in older adults. Methods: A cross-sectional study with 114 participants (mean age: 72.92 ± 4.97 years) was conducted. The 5STS, 30CS, power, and speed were measured using the ADR Encoder. Participants were categorized into frail, pre-frail, and robust groups according to the FRAIL Scale. Criterion, intraobserver, and interobserver validity were assessed. Results: Strong correlations (r > 0.7; p < 0.001) were found between

SUBMITTER: Polo-Ferrero L 

PROVIDER: S-EPMC12199191 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature