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The Dose Response Effect of Isometric Handgrip Training Frequency on Blood Pressure in Normotensive Individuals

NCT06329804 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 60

Last updated 2024-12-03

No results posted yet for this study

Summary

It is estimated by WHO (2021) that 1.4 billion individuals across the globe have high blood pressure with only 14% of people managing these elevated levels. Simple and effective lifestyle strategies are required to help people improve their blood pressure and/or attenuate increases in blood pressure with ageing. Exercise is one possible strategy: in previous research, several different types of exercise have been shown to have effects on blood pressure (Blackwell et al., 2017). However, many individuals do not adhere to currently recommended levels of exercise (150 mins of moderate intensity exercise per week), due to a combination of the required time commitment, lack of motivation, and the associated levels of effort / exertion and discomfort (Korkiakangas et al 2009). Thus, there is a need to investigate alternative exercise interventions which will overcome these barriers but remain effective at improving blood pressure (Herrod, Lund, \& Phillips, 2021).

Low intensity isometric hand grip training (IHGT) has been shown to result in large decreases in rest-ing blood pressure in younger and older age groups, in both men and women, and in individuals with normal as well as elevated baseline blood pressure (Badrov et al, 2013; Bentley et al., 2018; Millar et al., 2014). In this research, IHGT has typically involved performing 4 x 2 IHGT holds at 30% of maximal voluntary contraction, 3 times a week, over a 4-8-week intervention (Millar et al, 2014). Interestingly, there are very few studies that have investigated the effect of changing different protocol parameters on the adaptations in blood pressure, and the minimal effective dose of IHGT is unknown. One important modifiable parameter is training frequency and it is unknown whether reducing the frequency of IHGT will reduce the efficacy for improving blood pressure. Therefore, the aim of this randomised controlled trial is to compare the effect of IHGT with a frequency of 2 or 4 sessions/week on resting blood pressure.

Conditions

  • Blood Pressure

Interventions

OTHER

Isometric Handgrip Exercise Training (IHGT)

Each IHGT session will consist of 4 x 2-minute contractions at 30% maximal voluntary contraction, with 2-minutes of rest in between, performed with the dominant hand. Training will be performed using an electronic hand dynamometer (Camry EH101, Zhongshan Camry Electronic Co. Ltd, Guangdong).

Sponsors & Collaborators

  • National Taiwan Normal University

    collaborator OTHER

  • Swansea University

    lead OTHER

Principal Investigators

  • Richard Metcalfe, PhD · Swansea University

Study Design

Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
40 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2021-11-01
Primary Completion
2024-05-31
Completion
2024-05-31

Countries

  • Taiwan
  • United Kingdom

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06329804 on ClinicalTrials.gov