The study from the National Institute of Neurological Disorders and Stroke
There are several studies that show the benefit of resistance training like using weight-and-pulley machines and ankle weights and tai chi, which all have good effects on gait and balance. This is why many doctors recommend these exercises or physical therapies to treat instability for patients with Parkinson’s.
In a study funded by the National Institutes of Health’s National Institute of Neurological Disorders and Stroke or NINDS, researchers studied stretching, resistance training, and tai chi. It was found out that among these exercises that were evaluated, tai chi is the one that gave the best overall improvement in stability and balance to patients who have Parkinson’s.