Effects of tai chi and brisk walking on cardiopulmonary function, walking function and physical fitness in sedentary elderly with hypertension

INTERVENTION: brisk walk groups:brisk walk;Tai chi groups:tai chi;control groups:ADL; CONDITION: hypertension PRIMARY OUTCOME: cardiopulmonary exercise testing; SECONDARY OUTCOME: physical fitness test;walking test;Physical activity level testing;Blood biochemistry test; INCLUSION CRITERIA: (1) Participants were 65‐80 years old; 2) Do not exercise regularly within 6 months before starting exercise; 3) Clear consciousness, voluntary exercise intervention; 4) Standardized use of antihypertensive drugs; 5) Stable blood pressure control; 6) No obvious symptoms such as dizziness; 7) Meet the inclusion criteria of sedentary population; 8) Signed Informed consent file.