Cardiovascular Response to Isometric BFR Exercise

NCT ID: NCT06529068

Last Updated: 2025-06-12

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

21 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-12-02

Study Completion Date

2025-05-30

Brief Summary

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The goal of this interventional study is to evaluate the acute impact of isometric blood flow restriction (BFR) exercise on blood pressure and other cardiovascular functions in healthy young adult volunteers. The main question it aims to answer is:

The investigators hypothesize that isometric BFR exercise with a wide-rigid cuff would lead to greater blood pressure and other cardiovascular responses and that these cardiovascular responses would be greater under isometric BFR exercise with narrow-elastic bands compared with the control condition (no cuff).

Participants will perform isometric exercises in 3 laboratory visits with different exercise conditions) no cuff control 2) BFR with wide-rigid cuff 3) BFR with narrow-elastic band.

Detailed Description

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Conditions

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Blood Pressure

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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Isometric exercise without BFR cuff (control)

Group Type ACTIVE_COMPARATOR

Isometric handgrip exercise

Intervention Type BEHAVIORAL

The participants will perform isometric handgrip exercises without blood flow restriction.

Isometric exercise with narrow-elastic BFR band

Group Type EXPERIMENTAL

Isometric handgrip exercise with a narrow-elastic band

Intervention Type BEHAVIORAL

The participants will perform isometric handgrip exercises with blood flow restriction using a narrow-elastic band.

Isometric exercise with wide-rigid BFR cuff

Group Type EXPERIMENTAL

Isometric handgrip exercise with a wide-rigid cuff

Intervention Type BEHAVIORAL

The participants will perform isometric handgrip exercises with blood flow restriction using a wide-rigid cuff.

Interventions

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Isometric handgrip exercise

The participants will perform isometric handgrip exercises without blood flow restriction.

Intervention Type BEHAVIORAL

Isometric handgrip exercise with a narrow-elastic band

The participants will perform isometric handgrip exercises with blood flow restriction using a narrow-elastic band.

Intervention Type BEHAVIORAL

Isometric handgrip exercise with a wide-rigid cuff

The participants will perform isometric handgrip exercises with blood flow restriction using a wide-rigid cuff.

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

\- Apparently healthy young adults aged between 18 - 40 years old and signed the informed consent.

Exclusion Criteria

* Abnormal clotting times
* Acid-base imbalance/acidosis
* Arterial calcification
* Atherosclerotic vessels
* Cardiopulmonary conditions
* Diabetes
* Dialysis/central venous access
* General/local infection
* High intracranial pressure
* Hip, pelvis, or femur fracture
* History of venous thromboembolism
* Hypertension
* Immobility for greater than 48 hours in the past month
* Immobilizing cast
* Implanted medical device
* Lymphectomies
* Obesity
* Open fracture
* Open or unhealed soft tissue injuries
* Paralysis
* Peripheral vascular disease
* Pregnancy/postpartum
* Prior revascularization
* Renal compromise
* Severe crush injuries
* Sickle cell trait/anemia
* Skin grafts
* Stroke
* Temporary nerve damage
* Thrombophilia
* Tumor/cancer
* Varicose veins
* Vascular grafting
Minimum Eligible Age

18 Years

Maximum Eligible Age

40 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University of Texas at Austin

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Cardiovascular Aging Research Laboratory

Austin, Texas, United States

Site Status

Countries

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United States

References

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Lind AR. Cardiovascular responses to static exercise. (Isometrics, anyone?). Circulation. 1970 Feb;41(2):173-6. doi: 10.1161/01.cir.41.2.173. No abstract available.

Reference Type BACKGROUND
PMID: 5412979 (View on PubMed)

Domingos E, Polito MD. Blood pressure response between resistance exercise with and without blood flow restriction: A systematic review and meta-analysis. Life Sci. 2018 Sep 15;209:122-131. doi: 10.1016/j.lfs.2018.08.006. Epub 2018 Aug 4.

Reference Type BACKGROUND
PMID: 30086274 (View on PubMed)

Bond CW, Hackney KJ, Brown SL, Noonan BC. Blood Flow Restriction Resistance Exercise as a Rehabilitation Modality Following Orthopaedic Surgery: A Review of Venous Thromboembolism Risk. J Orthop Sports Phys Ther. 2019 Jan;49(1):17-27. doi: 10.2519/jospt.2019.8375. Epub 2018 Sep 12.

Reference Type BACKGROUND
PMID: 30208794 (View on PubMed)

Mannozzi J, Al-Hassan MH, Kaur J, Lessanework B, Alvarez A, Massoud L, Aoun K, Spranger M, O'Leary DS. Blood flow restriction training activates the muscle metaboreflex during low-intensity sustained exercise. J Appl Physiol (1985). 2023 Aug 1;135(2):260-270. doi: 10.1152/japplphysiol.00274.2023. Epub 2023 Jun 22.

Reference Type BACKGROUND
PMID: 37348015 (View on PubMed)

Song JS, Yamada Y, Wong V, Bell ZW, Spitz RW, Abe T, Loenneke JP. Hypoalgesia following isometric handgrip exercise with and without blood flow restriction is not mediated by discomfort nor changes in systolic blood pressure. J Sports Sci. 2022 Mar;40(5):518-526. doi: 10.1080/02640414.2021.2003569. Epub 2021 Nov 25.

Reference Type BACKGROUND
PMID: 34823439 (View on PubMed)

Renzi CP, Tanaka H, Sugawara J. Effects of leg blood flow restriction during walking on cardiovascular function. Med Sci Sports Exerc. 2010 Apr;42(4):726-32. doi: 10.1249/MSS.0b013e3181bdb454.

Reference Type BACKGROUND
PMID: 19952840 (View on PubMed)

Early KS, Rockhill M, Bryan A, Tyo B, Buuck D, McGinty J. EFFECT OF BLOOD FLOW RESTRICTION TRAINING ON MUSCULAR PERFORMANCE, PAIN AND VASCULAR FUNCTION. Int J Sports Phys Ther. 2020 Dec;15(6):892-900. doi: 10.26603/ijspt20200892.

Reference Type BACKGROUND
PMID: 33344005 (View on PubMed)

Credeur DP, Hollis BC, Welsch MA. Effects of handgrip training with venous restriction on brachial artery vasodilation. Med Sci Sports Exerc. 2010 Jul;42(7):1296-302. doi: 10.1249/MSS.0b013e3181ca7b06.

Reference Type BACKGROUND
PMID: 20019641 (View on PubMed)

Schneider AC, Hughes WE, Ueda K, Bock JM, Casey DP. Reduced blood pressure responsiveness to skeletal muscle metaboreflex activation in older adults following inorganic nitrate supplementation. Nitric Oxide. 2018 Aug 1;78:81-88. doi: 10.1016/j.niox.2018.05.010. Epub 2018 Jun 1.

Reference Type BACKGROUND
PMID: 29864505 (View on PubMed)

Other Identifiers

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STUDY00006378

Identifier Type: -

Identifier Source: org_study_id

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