Passive Clutch System for the Selection of Concentric and Eccentric Exercises

Bidirectional exercises that involve repeated concentric and eccentric contractions can be performed using simple tools such as pull-up bands or dumbbells. However, injuries can occur if one cannot overcome the excessive resistance relative to physical capabilities, particularly during eccentric con...

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Bibliographic Details
Published inIEEE access Vol. 12; p. 1
Main Authors Jeong, Jisu, Shin, Wonseok, Song, Yuri, Kim, Yoonjin, Kwon, Suncheol, Na, Youngjin
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 01.01.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Clutch System
Concentric exercise
Eccentric exercise
Eccentricity
Effectiveness
Elbow
Electromyography
Fasteners
Force
Human motion
Immune system
Injuries
Muscles
Pawl–Ratchet mechanism
Performance evaluation
Portable equipment
Pulleys
Springs
Training
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Summary:Bidirectional exercises that involve repeated concentric and eccentric contractions can be performed using simple tools such as pull-up bands or dumbbells. However, injuries can occur if one cannot overcome the excessive resistance relative to physical capabilities, particularly during eccentric contractions. Based on the pawl-ratchet clutch mechanism and an elastic band, we developed a portable exercise device that allows performing unidirectional or bidirectional exercises involving concentric/eccentric contractions, or both. The device has a clutch mode and a resistance mode, and it allows the user to choose between concentric and eccentric contractions by selecting the mode. The feasibility and effectiveness of the device in the flexion-extension movements of the human elbow were evaluated, and electromyography signals were measured. The results showed that, from the moment the clutch is released, the electromyography signal of the agonist muscle decreased significantly to a magnitude similar to that observed during free movement, confirming that the device allows the user to concentrate on concentric movements. We also found that the exercise resistance increased with increasing applied spring stiffness. Our versatile device has the potential to enable effective movements not only for intensive unidirectional exercises but also for the rehabilitation of subjects at risk of injury.
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ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2024.3513353