High-Intensity Aerobic Exercise Prior to Balance Training

Low-Intensity Exercise Prior to Balance Training

20-30 minutes of high intensity aerobic exercise followed by 20-30 minutes of individualized balance training over telehealth twice weekly, for 8 weeks (16 sessions total). For the aerobic component, participants will be instructed in a 20-30-minute exercise program, using available equipment already located in the participant's home (eg. stationary cycle, elliptical trainer, etc). Exercise intensity is moderate-to-high (between 50-85% Heart Rate Reserve. Participants will be placed on a ramped protocol which increases in intensity slowly over the course of the intervention period. For the balance training component, exercises will consist of steady state, proative, and reactive balance activities that involve sensory integration of vision, proprioception, and vestibular senses. Exercises will be individualized based on baseline assessment outcomes and severity of ataxia as rated by the SARAHome.

Clinical rating scale for severity of ataxia symptoms. This is an 8-item clinical performance based scale, which individuals are graded according to total ataxia severity. Total scores can range from 0 (no ataxia) to 40 (most severe ataxia). Scores are based on performance of the following tasks: 1) Gait, 2) Stance, 3), Sitting, 4) Speech Disturbance, 5) Finger Chase, 6) Nose-Finger Test, 7) Fast alternating hand movements, 8) Heel-shin slide. For the purpose of this study, we will be performing a validated modified version of the SARA, referred to as the SARAHome. The SARAHome is comprised of the first four items and item 6 from the original SARA Scale (Gait, Stance, Walking, Speech, and Nose-Finger Test) and it will be administered via telehealth.

The Cerebellar Cognitive Affective Syndrome Scale (CCAS) was developed as a bedside quick screen for Cerebellar Cognitive Affective Symptom (also referred to as Schmalmann's Syndrome). The CCAS is a 10-item scale of cognitive and neuropsychiatric tests detailing executive function, working and verbal memory, language, visuospatial function, abstract reasoning, behavior and affect. Two scores are reported; a raw score ranging from 0 (severe cognitive impairment) to 120 points (no cognitive impairment), as well as a Pass/Fail marker for each of the 10 items on the scale. 1 fail is considered as possible cerebellar cognitive affective symptom, 2 fails are considered probable, and 3 fails are considered clinically definite.

Patient reported outcome measure for people with ataxia. The test was developed to assess 3 domains (physical, activities of daily living, mental health) and 14 subdomains. It has been proven to be valid and reliable against measures of motor ataxia, mental health, and quality of life. The original Patient Reported Outcome Measure for Ataxia has 70 questions, and records a total score out of 280 possible points. For the purpose of this trial, we will use the Short-Form version of this assessment which asks 10 questions, and it scored out of a total of 40 possible points.

Patient reported outcome evaluating the balance confidence of a participant in performing a variety of activities without losing balance or experiencing a state of unsteadiness. Participants are asked to rank their perceived balance confidence on a scale of 0% (no balance confidence) to 100% (high balance confidence). All scores are summed, and averaged for a total overall estimate of balance confidence.