Asset Details
Do you wish to reserve the book?
Effects of ischemic pre-conditioning on electrically stimulated contractions
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Effects of ischemic pre-conditioning on electrically stimulated contractions
Do you wish to request the book?
Effects of ischemic pre-conditioning on electrically stimulated contractions
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Effects of ischemic pre-conditioning on electrically stimulated contractions
2025
Overview
Purpose
Ischemic pre-conditioning (IPC) offers protection against future ischemic events and may improve sports performance due to several mechanisms at local and systemic levels. This study investigates the local effects on muscle contractility in electrically induced muscle contractions, thus effectively excluding any uncontrolled change in the motor drive.
Methods
Twenty-one subjects were divided into two groups: 12 subjects in the IPC group (3 × 5/5 min right arm ischemia/reperfusion; cuff pressure 250 mmHg) and 9 subjects in the SHAM group (same treatment at 20 mmHg). The adductor pollicis was contracted by supramaximal stimulation of the ulnar nerve with single pulses, trains of stimuli (5, 8, 10 and 12 Hz, 1-s duration) and bursts (4 pulses, 25 Hz), all separated by 5-s intervals. The stimulation sequence was delivered before and 15 and 30 min after IPC/SHAM treatment. The isometric contraction force, the superficial electromyographic signal, and tissue oxygenation were continuously monitored.
Results
A significant force decrease in time was observed at 8, 10 (
p
< 0.01) and 12 Hz (
p
< 0.05) along with a decrease in half-relaxation time in single twitches and bursts (
p
= 0.01), regardless of treatment. This general time-related weakening was more marked in IPC than SHAM at 5-Hz stimulation. No effects were observed on the magnitude of the superficial electromyographic signal.
Conclusion
Data indicate that IPC does not increase muscle force during electrically stimulated contractions, supporting the idea that IPC’s ergogenic effects are not due to increased muscle contractility.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V
Subject
/ Arm
/ Biomedical and Life Sciences
/ Female
/ Humans
/ Ischemia
/ Ischemic Preconditioning - methods
/ Isometric Contraction - physiology
/ Male
/ Muscle Contraction - physiology
/ Muscle, Skeletal - blood supply
/ Muscle, Skeletal - physiology
/ Occupational Medicine/Industrial Medicine
/ Original
