International Journal of Environmental Research and Public Health

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Special Issue Editor

Dr. Phil Handcock

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Guest Editor

Institute of Sport, Exercise and Health, Otago Polytechnic, Dunedin 9016, New Zealand
Interests: strength and conditioning; musculoskeletal injury and exercise rehabilitation and return to play/activity; rugby injury and return to play experiences of professional athletes; professional competence of exercise professionals; concussion management; exercise prescription as a sustainable practice

Special Issue Information

Dear Colleagues,

The burden of exercise and sports injuries has been well documented, with physical, emotional, and social consequences occurring both proximal and distal to an injury event. Significant research effort and resources have been committed to the complex challenge of preventing injury, seemingly with limited success. Arguably, more attention could be paid to other elements of injury prevention such as attitudes to pain and injury, the ‘cultures' in which injuries occur, how injury recovery and return to activity are managed, and methods for reducing reinjury and recurrent injury. This Special Issue of the International Journal of Environmental Research and Public Health (IJERPH) seeks to examine these aspects of the sequence of injury prevention. Papers addressing these considerations from a diverse range of methodological perspectives are invited for this Special Issue, especially those with high academic rigour that can offer interdisciplinary and practical foci. New research manuscripts, reviews, case reports, short communications, and commentaries are welcomed.

Dr. Phil Handcock
Guest Editor

Manuscript Submission Information

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Keywords

reinjury
sociology of pain
sporting ethic
return to activity
prevention

Published Papers (1 paper)

Research

9 pages, 828 KiB

Open AccessArticle

Quadriceps Electromyographic Activity in Closed and Open Kinetic-Chain Exercises with Hip-Adductor Co-Contraction in Sedentary Women

by Parinyathip Thongduang, Uraiwan Chatchawan, Rungthip Puntumetakul, Junichiro Yamauchi and Punnee Peungsuwan

Int. J. Environ. Res. Public Health 2022, 19(19), 12929; https://doi.org/10.3390/ijerph191912929 - 09 Oct 2022

Cited by 2 | Viewed by 2043

Abstract

Background: Different closed and open kinetic-chain exercises with hip-adductor co-contraction have different effects on quadriceps activity. The aim of this study was to investigate the difference in quadriceps activity during the squat (SQ) and knee extension (KE) and straight leg raise (SLR) exercises with and without hip adduction in sedentary women. Methods: Twenty-eight sedentary women aged 44.5 ± 8.5 years were recruited. They performed three exercises with and without hip adduction. Surface electromyography (sEMG) activity was measured on the rectus femoris (RF), vastus medialis oblique (VMO) and vastus lateralis (VL) muscles. The levels of sEMG activities of the three muscles were compared among the six exercises using a repeated-measures ANOVA. Results: The findings showed that RF activity was lowest during the SQ alone and highest during the SLR exercise (p < 0.05 to 0.001). The VMO activity was significantly greater in the SQH than in the five types of exercises (p < 0.05 to 0.001), which led to a significant VMO/VL ratio as well. VL activity increased while the squat with hip adduction and knee extension with hip adduction exercise compared with SQ alone. Conclusion: This study indicates that a closed-chain squat with hip co-contraction can produce the VMO and VMO/VL ratio activity, while an open chain of SLR better activates the RF activity. The findings support the understanding of quadriceps activity in different exercises to be an alternative home-based exercise for physical therapy in women facing muscle weakness. Full article

(This article belongs to the Special Issue Preventing Exercise and Sport Related Injury: Can We Be Doing Better?)

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