Foot reflexology was performed in every participant in the foot reflexology group after resting for 5 minutes in a sitting position by the same researcher who was trained and certified by the Department of Thai Traditional and Alternative Medicine, Ministry of Health.

The control group received conventional treatment including anti-HT medications according to the standard HT guideline's recommendations. In the end of the follow-up visit, every participants were informed to adhere to their medication and were encouraged to have healthy lifestyles including salt restriction, regular exercise, and consuming healthy diets.

Acupressure was applied at the plantar side of the right foot at the first metatarsal bone, around 1-1.5 centimeters proximal to the first metatarsophalangeal joint. (Figure 2) Approximately 3-kilogram pressure was applied by using a knuckle of the right index finger (dorsal part of the proximal interphalangeal joint in flexing position) in a perpendicular manner and held for 15 seconds (sec) then released for 5 sec. This hold-release cycle was done 5 times over the course of 2 min. This method was recommended by the Department of Thai Traditional and Alternative Medicine in accordance with the Zone theory and the Meridian theory.

The office blood pressures (BP) were measured by a nurse at baseline and at 15 and 30 min after foot reflexology was done in the intervention group. While in the control group, office BPs were measured at baseline and after resting in a quiet room for 15 and 30 min. A validated, FDA-approved automatic BP device (DINAMAP Pro 300, GE healthcare) with the appropriate cuff size for individual arm circumference was used for measurement. Two BP measurements were taken at 2-min intervals, and the average BP were recorded for analyses.

The office blood pressures (BP) were measured by a nurse at baseline and at 15 and 30 min after foot reflexology was done in the intervention group. While in the control group, office BPs were measured at baseline and after resting in a quiet room for 15 and 30 min. A validated, FDA-approved automatic BP device (DINAMAP Pro 300, GE healthcare) with the appropriate cuff size for individual arm circumference was used for measurement. Two BP measurements were taken at 2-min intervals, and the average BP were recorded for analyses.

The office pulse rate (PR) was measured by a nurse at baseline and at 15 and 30 min after foot reflexology was done in the intervention group. While in the control group, office PR was measured at baseline and after resting in a quiet room for 15 and 30 min.

The office pulse rate (PR) was measured by a nurse at baseline and at 15 and 30 min after foot reflexology was done in the intervention group. While in the control group, office PR was measured at baseline and after resting in a quiet room for 15 and 30 min.

Compare the degree of reduction of blood pressure between intervention and control group