50 patients aged 75 or older with sarcopenia Intervention: Each patient's supine and standing blood pressures will be measured.

50 patients aged 75 or older without sarcopenia Intervention: Each patient's supine and standing blood pressures will be measured.

Intervention: Each patient's supine and standing blood pressure measurements will be recorded

All blood pressure measurements will be performed in the morning after an eight-hour fasting. After 5-minute rest, the first blood pressure measurement will be taken when the patients are supine. Later, three more consecutive measurements will be recorded when the patients stand up each being one-minute apart. All measurements will be performed using a fully automated sphygmomanometer that is attached with the correctly sized cuff matching to the patients' upper arm circumference. OH is defined as a decrease in systolic blood pressure of 20 mm Hg or a decrease in diastolic blood pressure of 10 mm Hg within 3 minutes of standing. The accompanying symptoms such as dizziness, unable to maintain balance, blurred vision will also be recorded.