Competitive swimmers with hypermobility have strength and fatigue deficits in shoulder medial rotation

Research output: Contribution to journalJournal articleResearchpeer-review

171 Downloads (Pure)

Abstract

Generalised Joint Hypermobility including shoulder hypermobility (GJHS) in swimmers is considered an intrinsic risk factor for shoulder injuries. The aim was to investigate the association of GJHS with shoulder strength, fatigue development and muscle activity during swimming-related shoulder rotations. Totally, 38 competitive swimmers (aged 13-17 years) participated, 19 were competitive swimmers with GJHS and 19 were age, sex and club matched swimmers without GJHS. Concentric isokinetic force in medial and lateral rotations were measured at 60°/s (5 repetitions) and 180°/s (10 repetitions). Electromyographic activity was measured from upper trapezius, lower trapezius, serratus anterior, infraspinatus and pectoralis major muscles. Swimmers with GJHS produced significantly lower peak torque (0.53 vs. 0.60 Nm/kg; p = .047) and maximum work (0.62 vs. 0.71 J/kg; p = .031) than controls during medial rotation (60°/s). Swimmers with GJHS showed significantly larger isokinetic fatigue at 180°/s (0.321 J/repetition; p = .010), and tendencies to lower levels of muscle activity in infraspinatus (20%, p = .066) and pectoralis major (34%, p = .092) at 60°/s during medial rotation. Young competitive swimmers with GJHS, despite no formal diagnosis, displayed strength and fatigue deficits in medial rotation, potentially inherent with greater risk of shoulder injury. Whether GJHS swimmers benefit from medial rotation strengthening is an important topic for future studies.

Original languageEnglish
JournalJournal of Electromyography & Kinesiology
Volume39
Pages (from-to)1-7
ISSN1050-6411
DOIs
Publication statusPublished - Apr 2018

Fingerprint

Joint Instability
Rotator Cuff
Superficial Back Muscles
Pectoralis Muscles
Muscle Fatigue
Intrinsic Factor
Muscle Development
Torque
Muscles

Keywords

  • Journal Article
  • Joint instability
  • Muscle strength
  • Shoulder
  • Adolescent
  • Electromyography
  • Swimming
  • Torque
  • Humans
  • Male
  • Shoulder/physiology
  • Shoulder Joint/physiology
  • Range of Motion, Articular
  • Female
  • Muscle, Skeletal/physiology
  • Muscle Fatigue
  • Muscle Strength
  • Swimming/physiology

Cite this

@article{ec0b8676460343eba8a30584e43f60d9,
title = "Competitive swimmers with hypermobility have strength and fatigue deficits in shoulder medial rotation",
abstract = "Generalised Joint Hypermobility including shoulder hypermobility (GJHS) in swimmers is considered an intrinsic risk factor for shoulder injuries. The aim was to investigate the association of GJHS with shoulder strength, fatigue development and muscle activity during swimming-related shoulder rotations. Totally, 38 competitive swimmers (aged 13-17 years) participated, 19 were competitive swimmers with GJHS and 19 were age, sex and club matched swimmers without GJHS. Concentric isokinetic force in medial and lateral rotations were measured at 60°/s (5 repetitions) and 180°/s (10 repetitions). Electromyographic activity was measured from upper trapezius, lower trapezius, serratus anterior, infraspinatus and pectoralis major muscles. Swimmers with GJHS produced significantly lower peak torque (0.53 vs. 0.60 Nm/kg; p = .047) and maximum work (0.62 vs. 0.71 J/kg; p = .031) than controls during medial rotation (60°/s). Swimmers with GJHS showed significantly larger isokinetic fatigue at 180°/s (0.321 J/repetition; p = .010), and tendencies to lower levels of muscle activity in infraspinatus (20{\%}, p = .066) and pectoralis major (34{\%}, p = .092) at 60°/s during medial rotation. Young competitive swimmers with GJHS, despite no formal diagnosis, displayed strength and fatigue deficits in medial rotation, potentially inherent with greater risk of shoulder injury. Whether GJHS swimmers benefit from medial rotation strengthening is an important topic for future studies.",
keywords = "Journal Article, Joint instability, Muscle strength, Shoulder, Adolescent, Electromyography, Swimming, Torque, Humans, Male, Shoulder/physiology, Shoulder Joint/physiology, Range of Motion, Articular, Female, Muscle, Skeletal/physiology, Muscle Fatigue, Muscle Strength, Swimming/physiology",
author = "Behnam Liaghat and Birgit Juul-Kristensen and Thomas Frydendal and {Marie Larsen}, Camilla and Karen S{\o}gaard and {Ilkka Tapio Salo}, Aki",
note = "Copyright {\circledC} 2018 Elsevier Ltd. All rights reserved.",
year = "2018",
month = "4",
doi = "10.1016/j.jelekin.2018.01.003",
language = "English",
volume = "39",
pages = "1--7",
journal = "Journal of Electromyography & Kinesiology",
issn = "1050-6411",
publisher = "Elsevier",

}

TY - JOUR

T1 - Competitive swimmers with hypermobility have strength and fatigue deficits in shoulder medial rotation

AU - Liaghat, Behnam

AU - Juul-Kristensen, Birgit

AU - Frydendal, Thomas

AU - Marie Larsen, Camilla

AU - Søgaard, Karen

AU - Ilkka Tapio Salo, Aki

N1 - Copyright © 2018 Elsevier Ltd. All rights reserved.

PY - 2018/4

Y1 - 2018/4

N2 - Generalised Joint Hypermobility including shoulder hypermobility (GJHS) in swimmers is considered an intrinsic risk factor for shoulder injuries. The aim was to investigate the association of GJHS with shoulder strength, fatigue development and muscle activity during swimming-related shoulder rotations. Totally, 38 competitive swimmers (aged 13-17 years) participated, 19 were competitive swimmers with GJHS and 19 were age, sex and club matched swimmers without GJHS. Concentric isokinetic force in medial and lateral rotations were measured at 60°/s (5 repetitions) and 180°/s (10 repetitions). Electromyographic activity was measured from upper trapezius, lower trapezius, serratus anterior, infraspinatus and pectoralis major muscles. Swimmers with GJHS produced significantly lower peak torque (0.53 vs. 0.60 Nm/kg; p = .047) and maximum work (0.62 vs. 0.71 J/kg; p = .031) than controls during medial rotation (60°/s). Swimmers with GJHS showed significantly larger isokinetic fatigue at 180°/s (0.321 J/repetition; p = .010), and tendencies to lower levels of muscle activity in infraspinatus (20%, p = .066) and pectoralis major (34%, p = .092) at 60°/s during medial rotation. Young competitive swimmers with GJHS, despite no formal diagnosis, displayed strength and fatigue deficits in medial rotation, potentially inherent with greater risk of shoulder injury. Whether GJHS swimmers benefit from medial rotation strengthening is an important topic for future studies.

AB - Generalised Joint Hypermobility including shoulder hypermobility (GJHS) in swimmers is considered an intrinsic risk factor for shoulder injuries. The aim was to investigate the association of GJHS with shoulder strength, fatigue development and muscle activity during swimming-related shoulder rotations. Totally, 38 competitive swimmers (aged 13-17 years) participated, 19 were competitive swimmers with GJHS and 19 were age, sex and club matched swimmers without GJHS. Concentric isokinetic force in medial and lateral rotations were measured at 60°/s (5 repetitions) and 180°/s (10 repetitions). Electromyographic activity was measured from upper trapezius, lower trapezius, serratus anterior, infraspinatus and pectoralis major muscles. Swimmers with GJHS produced significantly lower peak torque (0.53 vs. 0.60 Nm/kg; p = .047) and maximum work (0.62 vs. 0.71 J/kg; p = .031) than controls during medial rotation (60°/s). Swimmers with GJHS showed significantly larger isokinetic fatigue at 180°/s (0.321 J/repetition; p = .010), and tendencies to lower levels of muscle activity in infraspinatus (20%, p = .066) and pectoralis major (34%, p = .092) at 60°/s during medial rotation. Young competitive swimmers with GJHS, despite no formal diagnosis, displayed strength and fatigue deficits in medial rotation, potentially inherent with greater risk of shoulder injury. Whether GJHS swimmers benefit from medial rotation strengthening is an important topic for future studies.

KW - Journal Article

KW - Joint instability

KW - Muscle strength

KW - Shoulder

KW - Adolescent

KW - Electromyography

KW - Swimming

KW - Torque

KW - Humans

KW - Male

KW - Shoulder/physiology

KW - Shoulder Joint/physiology

KW - Range of Motion, Articular

KW - Female

KW - Muscle, Skeletal/physiology

KW - Muscle Fatigue

KW - Muscle Strength

KW - Swimming/physiology

U2 - 10.1016/j.jelekin.2018.01.003

DO - 10.1016/j.jelekin.2018.01.003

M3 - Journal article

C2 - 29353138

VL - 39

SP - 1

EP - 7

JO - Journal of Electromyography & Kinesiology

JF - Journal of Electromyography & Kinesiology

SN - 1050-6411

ER -