Serratus anterior contraction during resisted arm extension (GravityFit) assessed by MRI
Owen, P. J., Rantalainen, T., Scheuring, R. A., & Belavy, D. L. (2019). Serratus anterior contraction during resisted arm extension (GravityFit) assessed by MRI. Frontiers in Physiology, 10, Article 1164. https://doi.org/10.3389/fphys.2019.01164
Published inFrontiers in Physiology
DisciplineBiomekaniikkaGerontologian tutkimuskeskusHyvinvoinnin tutkimuksen yhteisöBiomechanicsGerontology Research CenterSchool of Wellbeing
© 2019 The Authors
Background: Scapular stabilization is a common focus of shoulder rehabilitation. Objective: Examine contraction of serratus anterior during a bilateral arm extension exercise with axial compression using an exercise device (GravityFit) by magnetic resonance imaging (MRI). Methods: MRI was performed under two conditions: rest and static arm extension with axial compression. Load was set at 20% of age, sex and weight estimated bench press one-repetition maximum. A T2-weighted sequence was used to collect 14 axial images of the upper thoracic spine and shoulder bilaterally. Mean muscle length and thickness were calculated for the whole muscle and in equidistant subregions of the muscle in its anterior (superficial), central and posterior (deep) portions. Adjustment of p-values to guard against false positives was performed via the false discovery rate method. Results: Nine participants without a history of shoulder or spine pathology were included. When compared to rest, arm extension with the exercise device led to 11% increased overall muscle thickness (P = 0.038) and 6.1% decreased overall muscle length (P = 0.010). Regionally, thickness increased in anterior (superficial, +19%; P = 0.040) and central (+17%; P = 0.028) portions of the muscle more than posterior (deep, +3.9%, P = 0.542). Conclusion: Contraction of serratus anterior occurred during static arm extension with axial compression produced by a novel exercise approach, as measured via MRI. The activation of serratus anterior differed across its length with greater contraction of the anterior and central portions. This may indicate compartmentalization of function within this muscle. Overall, the proof-of-principle findings justify the use of this exercise approach for the activation of serratus anterior. ...
Publication in research information system
MetadataShow full item record
- Liikuntatieteiden tiedekunta 
Additional information about fundingThis work was supported by GravityFit (Grant Number: RM32446), manufacturer of the exercise device used in testing.
Showing items with similar title or keywords.
Mitchell, Ulrike H.; Owen, Patrick J.; Rantalainen, Timo; Belavý, Daniel L. (Lippincott Williams & Wilkins, 2022)Increased joint mobility is a risk factor for joint injury, but muscle function may be able to compensate for it. Current evidence suggests reduced force production capacity in people with hypermobility. However, little ...
Physical disability in community-dwelling older people after hip fracture : randomized controlled trials with physical rehabilitation Edgren, Johanna (University of Jyväskylä, 2013)
Exercise for the intervertebral disc : a 6-month randomised controlled trial in chronic low back pain Owen, Patrick J.; Miller, Clint T.; Rantalainen, Timo; Simson, Katherine J.; Connell, David; Hahne, Andrew J.; Trudel, Guy; Ford, Jon J.; Belavy, Daniel L. (Springer, 2020)Background context Muscle, bone and tendon respond anabolically to mechanical forces. Whether the intervertebral disc (IVD) can benefit from exercise is unclear. Purpose To examine whether exercise can beneficially ...
Randomized Trial of General Strength and Conditioning Versus Motor Control and Manual Therapy for Chronic Low Back Pain on Physical and Self-Report Outcomes Tagliaferri, Scott D.; Miller, Clint T.; Ford, Jon J.; Hahne, Andrew J.; Main, Luana C.; Rantalainen, Timo; Connell, David A.; Simson, Katherine J.; Owen, Patrick J.; Belavy, Daniel L. (MDPI, 2020)Exercise and spinal manipulative therapy are commonly used for the treatment of chronic low back pain (CLBP) in Australia. Reduction in pain intensity is a common outcome; however, it is only one measure of intervention ...
Loiri, Annakaisa; Silaste, Sirpa (2011)TIIVISTELMÄ Intensiivisen ryhmäkuntoutuksen yhteys vaikeavammaisen CP-lapsen karkeamotoriikkaan Annakaisa Loiri ja Sirpa Silaste Fysioterapian Progradututkielma Jyväskylän yliopisto Liikunta- ja terveystieteiden tiedekunta, ...