The Application of an Innovative Reactive Agility Testing System for Assessment in Older Adults With Dynapenia

Before the experiment, the researchers explain the purpose and procedures to the participants. After signing the informed consent form and completing basic personal information, participants perform a 5-minute warm-up. They then practice the test procedure 1-3 times to become familiar with the visual stimuli, followed by a 3-minute rest before the formal experiment. Body composition and physical performance are assessed using handgrip strength, the five-time sit-to-stand test, and the skeletal muscle mass index. Fall risk is evaluated using a localized fall risk awareness questionnaire. Agility is tested using a reaction-based running task. Participants stand in a 1 m × 1 m preparation area, and one of two sensor lights placed 3 meters away lights up randomly. Participants run forward, pass through a photo gate, and touch the light to turn it off. Decision time, movement time, and total time are recorded over 10 trials.