Cardiac Response to Strength Training in Hypertensive Individuals

Evaluation of Cardiac Response to High and Low-Intensity Strength Training in Hypertensive Subjects

This study aims to determine the acute effects of high and low-intensity strength training on cardiac autonomic control in hypertensive subjects

Study Overview

• Status: Completed
• Conditions: Hypertension; Physical Exercise
• Intervention / Treatment: Other: high intensity; Other: Low intensity

Detailed Description

The present study aims to determine the cardiovascular response in hypertensive individuals between 30 and 60 years old to one session of high and low intensity strength training.

Participants will undergo a low-intensity strength training including squats, barbell rows, deadlifts and chest presses with a load dynamic of 12 repetitions for 6 sets at an execution speed of less than 55 % of your maximum weight. This is followed by a one-week washout period. Subsequently, high intensity strength training is performed with the same exercises but with a load of 6 repetitions for 6 series at an intensity greater than 80% of the maximum repetition speed. The order of the sessions will be random.

After each session, blood pressure will be recorded for 24 hours using a holter monitor, which will report pressures during both day and night

The results obtained will be determined by the differences in the before and after values. Consequently, the behavior of the following variables: 1) heart rate variability, 2) blood pressure and 3) heart rate will determine the final results of this research.

The entire study will be carried out at the Catholic University of Maule, in its Kinesiology laboratory.

• Study Type: Interventional
• Enrollment (Actual): 28
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Chile
  • Maule Region
    • Talca, Maule Region, Chile, 3469001
      • Universidad Católica del Maule

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Participants exclusively diagnosed with hypertension by a medical professional

Exclusion Criteria:

• Participants with any other chronic medical condition
• Subjects with any upper or lower limb injury that prevents strength training
• Subjects with cardiovascular abnormalities other than hypertension

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: high intensity; The low-intensity group undergoes a strength training program using barbells, weights and dumbbells consisting of 6 sets of 6 repetitions each, with an execution speed equal to or greater than 80% of the maximum velocity used in the one-repetition maximum	Other: high intensity; High intensity group: participants will be requested to perform the following exercises: 1)squat, 2)rowing, 3)deadlift and 4)bench press. All exercises will be performed with high intensity (80% of the maximum velocity used in one-repetition maximum) and will be supervised by a researcher.
Experimental: Low Intensity; The low-intensity group undergoes a strength training program using barbells, weights and dumbbells, consisting of 6 sets of 12 repetitions each, with an execution speed below 40% of the maximum velocity used in the one-repetition maximum	Other: Low intensity; Low intensity group: participants will be requested to perform the following exercises: 1)squat, 2) rowing, 3)deadlift and 4)bench press. All exercises will be performed with low intensity (40% of the maximum velocity used in one-repetition maximum) and will be supervised by a researcher.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Heart rate variability	Determine the effects of high and low-intensity strength training on heart rate variability, based on the time between each heartbeat, during the assessment	2 hours
Blood pressure systolic	Determine the effects of high and low intensity resistance training on blood pressure with a blood pressure monitor for 24 hours.	24 hours
Blood pressure diastolic	Determine the effects of high and low intensity resistance training on blood pressure diastolic with a blood pressure monitor for 24 hours.	24 hours
Blood pressure mean	Determine the effects of high and low intensity resistance training on blood pressure mean with a blood pressure monitor for 24 hours.	24 hours
Heart Rate	Determine the effects of high and low intensity strength training on the behavior of heart rate, using a heart rate monitor, throughout the intervention.	24 hours

Collaborators and Investigators

• Sponsor: Universidad Católica del Maule

Study record dates

Study Major Dates

• Study Start (Actual): March 20, 2023
• Primary Completion (Actual): July 20, 2024
• Study Completion (Actual): July 20, 2024

Study Registration Dates

• First Submitted: April 12, 2024
• First Submitted That Met QC Criteria: April 12, 2024
• First Posted (Actual): April 17, 2024

Study Record Updates

• Last Update Posted (Estimated): September 16, 2025
• Last Update Submitted That Met QC Criteria: September 9, 2025
• Last Verified: September 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Vascular Diseases; Cardiovascular Diseases; Behavior; Hypertension; Motor Activity; Physical Phenomena; Radiation; Radiation, Nonionizing; Sound; Ultrasonic Waves
• Other Study ID Numbers: 229/2022

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No