Related Experiment Video
Updated: Jun 5, 2025
Measuring the Motor Aspect of Cancer-Related Fatigue using a Handheld Dynamometer
Published on: February 20, 2020
Effects of neuromuscular fatigue induced by various modes of isometric handgrip exercise on post-exercise blood
Hao Zhu1,2, Li He2, Jiaqi Guo1
1Department of Health and Kinesiology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
Background:
Isometric handgrip exercise (IHE) is recommended as a non-pharmacological treatment for managing blood pressure. However, the effect of various modes of IHE on neuromuscular fatigue and post-exercise blood pressure responses have not been explored. The purpose of this study was to investigate the effects of the duration and muscle mass factors of IHE on post-exercise blood pressure responses.
Methods:
Twenty healthy participants were recruited for this repeated-measures study. Three isometric protocols with similar exercise load were conducted on 3 different days including: 1) unilateral IHE at 30% of maximal voluntary contraction (MVC) for 2 minutes; 2) bilateral IHE at 30% MVC for 1 minute; and 3) unilateral IHE at 20% MVC for 3 minutes. Each exercise had four bouts of IHE with two minutes of rest between bouts. The median frequency (MDF) and root mean square (RMS) of surface electromyography was used to assess the level of neuromuscular fatigue in the flexor digitorum superficialis (FDS), extensor carpi radialis longus (ECR), flexor carpi ulnaris (FCU), and extensor carpi ulnaris (ECU).
Results:
Correlation analysis revealed that FDS MDF fatigue during the bilateral IHE was moderately correlated with the immediate post-exercise systolic blood pressure change (SBP, r=0.456, P<0.05) and diastolic blood pressure change (DBP, r=0.682, P<0.01) and ten-minute post-exercise SBP change (r=0.510, P<0.05) and DBP change (r=0.569, P<0.01) during bilateral IHE at 30% MVC for 1 min. The RMS results indicate a significant correlation between ECR and DBP immediate post-exercise (r=-0.634, P<0.01) and DBP 10-minute post exercise (r=-0.484, P<0.05).
Conclusions:
This study suggests that neuromuscular fatigue of FDS and ECR of IHE are related to post-exercise blood pressure changes.
More Related Videos
09:04Skeletal Muscle Neurovascular Coupling, Oxidative Capacity, and Microvascular Function with 'One Stop Shop' Near-infrared Spectroscopy
Published on: February 20, 2018
06:00Determining The Electromyographic Fatigue Threshold Following a Single Visit Exercise Test
Published on: July 27, 2015
Related Concept Videos
01:20Exercise and Cardiovascular Response
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
01:26Exercise Stress Test
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
01:28Special considerations while measuring blood pressure
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
01:18Disorders of the Autonomic Nervous System
Raynaud's disease, also known as Raynaud's...
01:23Assessment of blood pressure in brachial artery(two-step method)
01:18Neural Regulation of Blood Pressure
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...