Walking Sensation Study

Inclusion Criteria: * Not having any significant existing medical conditions, historical health issues, or medications (outlined in the exclusion criteria table above) that could impede the execution of the walking task and assessment. * age 65 - 95. * no severe high blood pressure (systolic \< 180 mmHg and/or diastolic \< 100 mmHg at rest). * no severe vision impairment: visual acuity ≥ 20/70 as determined by Snellen eye chart. * slow walking speed: preferred walking speed slower than 1.0 m/s over 10 meter. * no cognitive impairment: Montreal Cognitive Assessment (MoCA) score ≥ 26 out of 30 possible points. * foot sensory impairment: Inability to feel the 10 g monofilament at ≥1 of 10 tested sites on either foot is considered a sign of impaired protective sensation. loss. Exclusion Criteria: * diagnosed neurological disorder or injury of the central nervous system, or observation of symptoms consistent with such a condition (Alzheimer's, Parkinson's, stroke, etc.) * severe arthritis, such as awaiting joint replacement * current cardiovascular, lung or renal disease; untreated diabetes; terminal illness * myocardial infarction or major heart surgery in the previous year * cancer treatment in the past year, except for nonmelanoma skin cancers and cancers having an excellent prognosis (e.g., early stage breast or prostate cancer) * current diagnosis of schizophrenia, other psychotic disorders, or bipolar disorder * currently taking medications that affect the central nervous system, such as benzodiazepines, anti-cholinergic medication, and GABAergic medication, among others * no severe vision impairment (visual acuity ≥ 20/70 as determined by Snellen eye chart) * uncontrolled hypertension at rest (systolic \> 180 mmHg and/or diastolic \> 100 mmHg) * bone fracture or joint replacement in the previous six months * current enrollment in any other clinical trial * planning to relocate out of the area during the study period * non-English\* speaking, due to the likelihood of difficulties following instructions and communicating remotely * clinical judgment of the investigative team