The rotator cuff muscles have a direction specific recruitment pattern during shoulder flexion and extension exercises

Wattanaprakornkul, Duangjai; Cathers, Ian; Halaki, Mark; Ginn, Karen A.

doi:10.1016/j.jsams.2011.01.001

Cited by 86 publications

(65 citation statements)

References 14 publications

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“…This precept has been challenged and laboratory data suggest that the supra-and infraspinatus are recruited preferentially during shoulder flexion and subscapularis is recruited at higher levels during extension. Higher supra-and infraspinatus activation during shoulder flexion may contribute to reducing anterior glide of the humeral head during activities involving shoulder flexion, and subscapularis activity to reducing posterior glide during extension (Wattanaprakornkul et al , 2011). This asynchronous activity may potentially be used to inform exercise prescription.…”

Section: Rotator Cuff Functionmentioning

confidence: 99%

Rotator cuff related shoulder pain: Assessment, management and uncertainties

2016

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Introduction:Rotator cuff related shoulder pain (RCRSP) is an over-arching term that encompasses a spectrum of shoulder conditions, including; subacromial pain (impingement) syndrome, rotator cuff tendinopathy, and symptomatic partial and full thickness rotator cuff tears. For those diagnosed with RCRSP one aim of treatment is to achieve symptom free shoulder movement and function. Findings from published high quality research investigations suggest that a graduated and wellconstructed exercise approach confers at least equivalent benefit as that derived from surgery for; subacromial pain (impingement) syndrome, rotator cuff tendinopathy, partial thickness RC tears and atraumatic full thickness rotator cuff tears. However considerable deficits in our understanding of RCRSP persist. These include; (i) cause and source of symptoms, (ii) establishing a definitive diagnosis, (iii) establishing the epidemiology of symptomatic RCRSP, (iv) knowing which tissues or systems to target intervention, and (v) which interventions are most effective. Purpose:The aim of this masterclass is to address a number of these areas of uncertainty and it will focus on; (i) RC function, (ii) symptoms, (iii) aetiology, (iv) assessment and management, (v) imaging, and (vi) uncertainties associated with surgery. Implications:Although people experiencing RCRSP should derive considerable confidence that exercise therapy is associated with successful outcomes that are comparable to surgery, outcomes may be incomplete and associated with persisting and recurring symptoms. This underpins the need for ongoing research to; better understand the aetiology, improve methods of assessment and management, eventually prevent these conditions. 2

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Section: Rotator Cuff Functionmentioning

confidence: 99%

Rotator cuff related shoulder pain: Assessment, management and uncertainties

2016

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“…11 The size of contraction of the hip joint adductor was measured using a stabilizer pressure bio-feedback (CHATANOOGA Group Inc., USA). J KPT was performed three times and the average value was used for analysis.…”

Section: ) Measurement (1) Goniometermentioning

confidence: 99%

The Effects of the Contraction Degree of Hip Joint Adductor on Abdominal Muscle Activity during Bilateral Lower Extremity Raising

et al. 2016

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Purpose: This study was to investigate the differences abdominal muscles activities of according to hip adductor contraction levels 20% (mild), 50% (moderate), and 70% (strong) of MVIC on during bilateral lower extremity raising exercise on supine. Methods: The subjects of the study were a total of 39 persons including 23 healthy males and 16 females, who performed bilateral lower extremity raising exercise in 20%, 50%, 70% MVIC hip contraction. Muscle activities were measured by using S-EMG in RA (rectus abdominis), IO (internal oblique), and EO (external oblique). Results: Muscle activity of the internal oblique abdominal muscle and external oblique abdominal muscle, their activities were also greatest with the adductor contraction size at 70% and there was statistically significant difference when compared with the adductor contraction size at 20% and 50% (p< 0.05). As for the rectus abdominis muscle according to the size of contraction of the adductor was greatest at 70%, without statistically significant difference (p> 0.05). Conclusion: bilateral lower extremity raising with strong hip joint adductor contraction was effective exercise to strengthen abdominal muscles. If subjects could not perform strong hip adductor contraction, moderate contraction is effective abdominal muscle contraction exercise. The contraction size of the adductor is small, weak contraction may trigger middle level contraction and therefore appropriate application of the exercise program of bilateral leg raising may result in great effect as a lumbar stabilization exercise.

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“…The number of participants across the studies ranged from 8 to 50 (mean = 18.16). Fourteen of the 18 studies provided a mean age for participants (20.55 years to 28.4 years) [1][2][3]5,7,[17][18][19][20][21][22][23][24][25][26], with two supplying only an overall age range [27,28] and one an age limit of <40 years [6]. All authors, with the exception of Swanik, Bliven, and Swanik [19], analyzed supraspinatus muscle activity across a broad range of exercises.…”

Section: Study Characteristicsmentioning

confidence: 99%

A Systematic Literature Review of the Resistance Exercises That Promote Maximal Muscle Activity of the Rotator Cuff in Normal Shoulders

Ganderton

Pizzari

2013

Shoulder & Elbow

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Background There are numerous resistance exercises that can be used to activate the rotator cuff. However, the optimal exercises to achieve maximal muscle activation in supraspinatus, infraspinatus, subscapularis and teres minor remain unclear. Thus, the aim of this systematic review is to identify the optimal resistance exercises for producing maximal muscle activation of the rotator cuff in normal shoulders. Methods A literature search was completed using six key databases ‐ MEDLINE, EMBASE, CINAHL, PEDro, SPORTdiscus and Cochrane Library (from inception to January 2012). The search yielded 452 records using terms relating to rotator cuff, exercise, and electromyography. Eighteen papers remained after duplicates were removed and selection criteria applied. Quality assessment, data extraction and data synthesis of included papers was undertaken. Results Prone horizontal abduction at 90–100° with external rotation, push‐up‐plus, empty can and full can produced greatest activity in supraspinatus; prone horizontal abduction at 90–100° with full external rotation, standing external rotation at 0° abduction and the push‐up‐plus exercise produced greatest activity in infraspinatus and push‐up‐plus and shoulder flexion exercise in subscapularis. There was limited data for teres minor. Discussion Exercises to elicit maximal activity of supraspinatus, infraspinatus and subscapularis in normal shoulders were identified.

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The rotator cuff muscles have a direction specific recruitment pattern during shoulder flexion and extension exercises

Cited by 86 publications

References 14 publications

Rotator cuff related shoulder pain: Assessment, management and uncertainties

Rotator cuff related shoulder pain: Assessment, management and uncertainties

The Effects of the Contraction Degree of Hip Joint Adductor on Abdominal Muscle Activity during Bilateral Lower Extremity Raising

A Systematic Literature Review of the Resistance Exercises That Promote Maximal Muscle Activity of the Rotator Cuff in Normal Shoulders

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