Feasibility of Fabric Orthosis for Knee Support in Elderly Gait Improvement

Inclusion Criteria: Eligibility for participation in the study requires that all the following criteria are met: 1. Age: Participants must be 65 years of age or older. 2. Comprehension and Compliance: Able to fully understand and comply with the instructions and study procedures. 3. Mobility-Impacting Conditions: Must have at least one of the following conditions affecting mobility: (1)Sarcopenia: * Muscle Strength: Handgrip strength of \<28 kg for men and \<18 kg for women. * Muscle Function: Short Physical Performance Battery (SPPB) score of 8 or less. * Muscle Mass: Bioelectrical impedance analysis (BIA) showing muscle mass \<7.0 kg/m² for men and \<5.7 kg/m² for women. (2)Diabetes: * Diagnosed distal symmetric polyneuropathy. * Sensory impairments in toes or feet. (3)Knee Osteoarthritis: * Kellgren-Lawrence grade ≥2. * Persistent pain (≥3 months) with a severity of at least 3 on the Numerical Rating Scale (NRS). Exclusion Criteria: Individuals meeting any of the following criteria will be excluded from study participation: 1. Inability to Consent: Unable to provide informed consent or not willing to participate in the study procedures. 2. Severe Sensory or Motion Limitations: Including severe visual or vestibular impairments that could increase the risk of falling. 3. Communication Barriers: Significant hearing, speech, or language problems that would hinder communication with study personnel. 4. Independent Walking Inability: Cannot walk independently without the aid of a walking device. 5. Other Significant Diseases or Conditions: * Neurological disorders that affect walking ability (e.g., stroke, Parkinson's disease). * Orthopedic or musculoskeletal conditions severely affecting lower limb function. * Severe cardiovascular conditions including uncontrolled hypertension or heart failure. * Respiratory diseases requiring regular oxygen therapy. * Active cancer treatment or cancer treatment within the past 3 years (except basal cell carcinoma or localized prostate cancer). * Severe psychiatric disorders like schizophrenia or bipolar disorder. 6. Other Exclusionary Factors: * Past severe orthopedic surgeries on lower limbs which might affect gait and mobility. * Severe back pain or any other condition affecting mobility not already listed.