Introduction: Adequate blood pressure control is necessary to reduce the risk of mortality from cardiovascular events. The effects of aerobic exercise on systemic arterial hypertension are already well known, however, to date, there is little evidence regarding the effect of an isometric exercise session for the lower limbs on blood pressure levels, especially when performed in elderly hypertensive individuals. Objective: To verify the effect of an isometric or aerobic exercise protocol for the lower limbs on 24-hour ambulatory blood pressure in elderly hypertensive individuals.
Introduction: Adequate blood pressure control is necessary to reduce the risk of mortality from cardiovascular events. The effects of aerobic exercise on systemic arterial hypertension are already well known, however, to date, there is little evidence regarding the effect of an isometric exercise session for the lower limbs on blood pressure levels, especially when performed in elderly hypertensive individuals. Objective: To verify the effect of an isometric or aerobic exercise protocol for the lower limbs on 24-hour ambulatory blood pressure in elderly hypertensive individuals. Methods: Thirty-six controlled hypertensive volunteers, aged ≥ 60 years, of both sexes, will be randomly selected based on their medical records. Volunteers will be randomized to perform an isometric wall squat exercise session (n=12 - 4 repetitions of 2 minutes of execution and 2 minutes of rest, performed at a specific angle of the volunteer\'s knee joint - Borg scale of 11 to 13 points - moderate intensity) or an aerobic exercise session on a stationary bike (n=12 - 40 minutes and at moderate intensity stipulated between the range of 50% to 60% of HR reserve and Borg scale of 11 to 13 points - moderate intensity) or a control session without exercise, 40 minutes per session (n=12). 24-hour Ambulatory Blood Pressure Monitoring will be performed pre- and post-session. Statistical analyzes will be performed using the ANOVA test (one way), power of 80% and alpha 95%, SPSS-26.0.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
36
Group control The control session will consist of keeping the volunteer sitting in a calm, air-conditioned environment for 40 minutes.
The intervention with isometric exercise for the lower limbs, the volunteers will start in a vertical position, with shoulders and hips in contact with the wall, feet parallel and shoulder-width apart and hands at the sides of the body. Then (second phase), the volunteers, maintaining contact with the wall, squatted and advanced their feet in the desired position until the knee joint angle reached the previously determined value. The third phase referred directly to the isometric effort of the isometric exercise session. For the isometric wall squat exercise session, volunteers will be asked to perform 4 repetitions of 2 minutes, with a 2-minute rest interval in a seated position for adequate rest between each repetition.
Volunteers will perform 50 minutes of horizontal exercise cycling (brand: pro-user), continuously and at moderate intensity (50% to 60% of HR reserve).
Institute of Cardiology
Porto Alegre, Rio Grande do Sul, Brazil
RECRUITING24-hour Ambulatory Blood Pressure Monitoring
Check 24-hour blood pressure levels (24-hour Ambulatory Blood Pressure Monitoring) obtained after an isometric squat session in elderly individuals with SAH and compare BP levels after an exercise session on a stationary bike and the control group.
Time frame: Until completion of the study, on average 4 months.
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