Isolation of infraspinatus in clinical test positions

Hughes, Phillip; Green, Rodney A.; Taylor, Nicholas F.

doi:10.1016/j.jsams.2013.05.011

Cited by 18 publications

(6 citation statements)

References 23 publications

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“…3,32,33 Other positions have been offered through previous studies, but these other positions have been shown to have increased posterior or middle deltoid activity along with increased IM activity. 10,11,26,34,35 This study did not attempt to try reciprocal inhibition techniques to quiet PD activity in any of these other positions. Third, the manual resistance applied toward external rotation was not quantified using any form of dynamometer.…”

Section: Limitationsmentioning

confidence: 99%

Testing Infraspinatus and Deltoid Muscles With New Technique to Decrease Deltoid Activity During Testing Using Emg Analysis

Forbush

Bandy

Garrison

et al. 2018

Intl J Sports Phys Ther

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Background: Muscle strength testing of an injured infraspinatus muscle (IM) is confounded by actions of synergistic muscles such as the posterior deltoid (PD). Hypothesis/Purpose:The purpose of this study was to describe a condition for testing of the IM that results in less EMG activity of the PD musculature. The researchers hypothesized that greater inhibition of the PD could be achieved through active adduction (AA), creating reciprocal inhibition of the PD.

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Section: Limitationsmentioning

confidence: 99%

Testing Infraspinatus and Deltoid Muscles With New Technique to Decrease Deltoid Activity During Testing Using Emg Analysis

Forbush

Bandy

Garrison

et al. 2018

Intl J Sports Phys Ther

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“…Moreover, recent research questions the accuracy of traditionally used infraspinatus and subscapularis EMG sampling methods: the two parts of infraspinatus have been shown to exhibit differing activity levels during resisted shoulder external rotation in normals, 63 and independent innervation of both upper and lower portions of subscapularis has been described, with each portion demonstrating a variable role. 64 The detailed SMD calculations undertaken for this review permit the most definitive answer to date regarding differences in shoulder EMG activity in people with SPS.…”

Section: Interpretation Of Evidencementioning

confidence: 99%

Electromyographic activity of the shoulder muscles during rehabilitation exercises in subjects with and without subacromial pain syndrome: a systematic review

Kinsella

Pizzari

2016

Shoulder & Elbow

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“…Currently, 22% of players suffer from at least one femoral tendon injury during a season. The risk factors commonly seen as predictive for knee or femoral joint injuries include a decreased hamstring/quadriceps ratio (H/Q) and a bilateral strength deficit, as well as the weakness of lower limb muscles [6,7]. Functional asymmetry of the lower limbs (side-to-side asymmetry) greater than 15% [1,8] may increase the risk of knee injuries [1,9].…”

Section: Introductionmentioning

confidence: 99%

Changes in Muscle Activity Imbalance of the Lower Limbs Following 3 Weeks of Supplementary Body-Weight Unilateral Training

et al. 2021

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This study examined the effects of a short-term supplementary body-weight training program on changes in the muscle activity imbalance of the lower limbs during high-speed running in soccer players. Fifteen professional male soccer players took part in the study (age: 25 ± 5 years, body mass: 79.2 ± 10.8 kg, stature: 177 ± 10 cm, training experience: 12 ± 5 years). The evaluations of lower limb muscle activity imbalance via surface electromyography (sEMG) were performed twice (pre- and post-intervention), at a three-week interval. The sEMG was measured bilaterally from the area of quadriceps (Q), hamstrings (H), and gluteal muscles (G) during high-speed running at 18 km/h using sEMG shorts. Between measurements, the athletes performed the supplementary body-weight program of the lower limbs 4 times a week for 3 weeks. The training included six body-weight exercises performed unilaterally. The load progression included an additional set of each exercise in successive weeks of the experiment. The two-way repeated-measures ANOVA indicated a statistically significant main interaction for time × muscle (p = 0.006; F = 6.948; η2 = 0.332). The post-hoc analysis for the interaction effect of time × muscle showed a statistically significant decrease in muscle imbalance for the post-intervention compared to the pre-intervention for the H (p < 0.001; ES = 1.32), G (p = 0.002; ES = 0.92), and T (p < 0.001; ES = 1.54), but not for Q (p = 0.56; ES = 0.14). Moreover, there was a statistically significant greater imbalance between the H, G, and T muscles versus Q (p = 0.043, ES = 1.15; p = 0.006, ES = 1.57; p = 0.001, ES = 1.69, respectively) for the values recorded pre-intervention. Changes in muscle activity after 3 weeks of sports-specific movement patterns were statistically significant. For the gluteal (G) and hamstring (H), the imbalance between the limbs decreased significantly (p = 0.01). The imbalance in the quadriceps muscles (Q), with respect to each limb, did not decrease significantly (p = 0.82) following the training intervention. Conclusions: The results of this study indicate that in-season soccer training supplemented with a body-weight training program successfully decreases gluteal and hamstring imbalance between limbs after 3 weeks of training.

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Isolation of infraspinatus in clinical test positions

Cited by 18 publications

References 23 publications

Testing Infraspinatus and Deltoid Muscles With New Technique to Decrease Deltoid Activity During Testing Using Emg Analysis

Testing Infraspinatus and Deltoid Muscles With New Technique to Decrease Deltoid Activity During Testing Using Emg Analysis

Electromyographic activity of the shoulder muscles during rehabilitation exercises in subjects with and without subacromial pain syndrome: a systematic review

Changes in Muscle Activity Imbalance of the Lower Limbs Following 3 Weeks of Supplementary Body-Weight Unilateral Training

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