The recent study published in the New England Journal of Medicine focuses on the association between tai chi and Parkinson’s disease. 195 Parkinson’s patients wer randomized assigned got the intervention of exercises- tai chi, stretching, and resistant training. All 195 patients were decided on the basis of type of exercise. Intervention included exercise for an hour a day,twice in a week for six months. 
After six months, falls were significantly reduced in the patients practicing tai Chi. in addition, balance posture was more ate loses in patients who received thie dose of tai chi as intervention. 
Great study by Dr.Li!