Study the effects of inspiratory muscle training at Low load of 25 %Maximal inspiratory pressure with slow breathing rate at 6 breaths/min on inspiratory muscle strength, lung function, chest wall expansion, abdominal expansion, exercise capacity and blood pressure in elderly with Isolated systolic hypertension.

Study the effects of inspiratory muscle training at Low load of 25 % Maximal inspiratory pressure with slow breathing rate at 6 breaths/min with BreatheMAXยฎdevice for 8 weeks at home on inspiratory muscle strength, lung function (slow vital capacity, inspiratory capacity), chest wall expansion, abdominal expansion, exercise capacity by arm ergometry and blood pressure in elderly with Isolated systolic hypertension. who have age 60-80 years.

Inclusion Criteria:

1. Subjects aged 60 to 80 years of age with an essential isolated systolic hypertension stage I II based on recommendation of JNC VII from primary care units in community and the Outpatient Department of Srinakarind hospital in Khon Kaen province Thailand
2. Good communication and co operation
3. Independent physical activity
4. Stable controlled hypertension

Exclusion Criteria:

1. Essential isolated systolic hypertension stage III or secondary hypertension
2. History of heart disease such as coronary artery disease myocardial infarction
3. History of respiratory disease such as asthma chronic bronchitis
4. History of neuromuscular disease such as muscle weakness cerebrovascular disease
5. History of renal disease
6. Exercise limited by pain