Shoulder Muscle Activation Levels During Exercises With Axial and Rotational Load on Stable and Unstable Surfaces

Nascimento, Vinícius Yan Santos; Torres, Rafaela Joyce Barbosa; Beltrão, Natália Barros; Santos, Priscila Soares dos; Pirauá, André Luiz Torres; Oliveira, Valéria Mayaly Alves de; Pitangui, Ana Carolina Rodarti

doi:10.1123/jab.2016-0177

Cited by 18 publications

(16 citation statements)

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“…Each participant visited the laboratory on two occasions, set apart by a minimum of 48 h to avoid the effects of muscle fatigue [ 10 ]. For each visit, the subjects were instructed to avoid strenuous exercise involving the upper body for 48 h before testing.…”

Section: Methodsmentioning

confidence: 99%

Effect of Five Bench Inclinations on the Electromyographic Activity of the Pectoralis Major, Anterior Deltoid, and Triceps Brachii during the Bench Press Exercise

Rodríguez-Ridao

Antequera-Vique

Martín-Fuentes

et al. 2020

IJERPH

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The bench press exercise is one of the most used for training and for evaluating upper-body strength. The aim of the current study was to evaluate the electromyographic (EMG) activity levels of the pectoralis major (PM) in its three portions (upper portion, PMUP, middle portion, PMMP, and lower portion, PMLP), the anterior deltoid (AD), and the triceps brachii (TB) medial head during the bench press exercise at five bench angles (0°, 15°, 30°, 45°, and 60°). Thirty trained adults participated in the study. The EMG activity of the muscles was recorded at the aforementioned inclinations at 60% of one-repetition maximum (1RM). The results showed that the maximal EMG activity for PMUP occurred at a bench inclination of 30°. PMMP and PMLP showed higher EMG activity at a 0° bench inclination. AD had the highest EMG activity at 60°. TB showed similar EMG activities at all bench inclinations. In conclusion, the horizontal bench press produces similar electromyographic activities for the pectoralis major and the anterior deltoid. An inclination of 30° produces greater activation of the upper portion of the pectoralis major. Inclinations greater than 45° produce significantly higher activation of the anterior deltoid and decrease the muscular performance of the pectoralis major.

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Section: Methodsmentioning

confidence: 99%

Effect of Five Bench Inclinations on the Electromyographic Activity of the Pectoralis Major, Anterior Deltoid, and Triceps Brachii during the Bench Press Exercise

Rodríguez-Ridao

Antequera-Vique

Martín-Fuentes

et al. 2020

IJERPH

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“…All participants visited the Fitness Centre two times during the five-week study period. These visits were separated with a minimum of 2 days to avoid muscle fatigue effects [20]. The first session was used to familiarize the participants and determine the load lifted in a maximum repetition (1RM) in the bench press exercise, while the second test session was used for electromyographic recording of the muscles to evaluate the bench press in two situations: 1) with the feet on the ground and the hips in a neutral position on the bench; and 2) with the hips and knees flexed at 90°.…”

Section: Methodsmentioning

confidence: 99%

“…Other studies have compared the muscle activation level of the bench press with other exercises, machines, and/or equipment for muscle conditioning [13–15]. Finally, other studies have evaluated the muscle activation according to the stability/instability of the surface when the bench press is executed [16–20]. Although, all of them have focused on the instability caused on the supporting surface of the body, using a balance cushion [16, 20] or a Swiss ball [16, 17, 19].…”

Section: Introductionmentioning

confidence: 99%

“…Finally, other studies have evaluated the muscle activation according to the stability/instability of the surface when the bench press is executed [16–20]. Although, all of them have focused on the instability caused on the supporting surface of the body, using a balance cushion [16, 20] or a Swiss ball [16, 17, 19]. Only, Norwood et al [18] generated instability in the lower limbs by placing their feet on a Bosu.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation and comparison of electromyographic activity in bench press with feet on the ground and active hip flexion

et al. 2019

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The present study aimed to evaluate and compare the levels of electromyographic activation in the pectoralis major, anterior deltoid, triceps brachii, forearm, rectus abdominis, external oblique, and rectus femoris muscles during a horizontal bench press in two situations: 1) with the feet on the ground; and 2) with active hip flexion and 90° of knee flexion. Twenty young men were familiarized with the procedure and the calculation of one-rep max (1RM). In a second session, electromyographic activity values were recorded in both bench press situations (with the feet on the ground vs active hip flexion and knees at 90°) at 60% 1RM. Performing the bench press with the hips and knees flexed produced significantly greater muscle activation of all elevated muscles ( p < 0.01; d > 0.5). The pectoralis major showed the greatest activation, followed by the anterior deltoid and the triceps brachii. In addition, the greater activation of the abdominal muscles occurs due to the need to stabilize the core while performing the bench press with hip and knee flexion as well as the lumbar spine due to traction of the hip flexors.

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“…Muscle activation intensity is the mean value of muscle activation during the exercise cycle. In this experiment, the RMS value of EMG was used to express the muscle activation intensity [29]. The RMS of the target muscle in each task was calculated as follows:…”

Section: Data Processingmentioning

confidence: 99%

Evaluation of a New Rotator Cuff Trainer Based on Oscillating Hydraulic Damping

Wang

Yang

et al. 2020

Healthcare

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In order to provide a convenient way to strengthen the rotator cuff muscles and prevent rotator cuff injury, this study designed an innovative strength trainer specifically for shoulder rotator cuff based on oscillating hydraulic damping. We carried out a myoelectric testing experiment to evaluate the shoulder rotation training effect and compared the results with traditional training equipment to verify the feasibility and validity of the new rotator cuff trainer (RCT). Then, we further explored the influence of different training postures and motion speeds on shoulder rotation training. In the experiment, subjects used three types of equipment (RCT, dumbbells and elastic bands) to perform shoulder rotation training under two movement speeds and two motion postures. The surface electromyography (sEMG) signals of targeted muscles were collected in real time and then further analyzed. The experimental results showed that when using the RCT, the muscle force generation sequence was more aligned with the biomechanical principles of shoulder rotation than using the other two training methods, and the target training muscles had the higher percentage of muscle work. During RCT training, a higher speed of movement (120°/s) led to a higher degree of muscle activation; coronal axis rotation was better for the infraspinatus training, and sagittal axis rotation was better for teres minor training. Based on these results, the RCT was proved to be more effective than traditional training methods. In order to exercise the different muscles of rotator cuff more comprehensively and extensively, different postures should be selected. Furthermore, the movement speed can be appropriately increased within the safe range to improve muscle activation.

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Shoulder Muscle Activation Levels During Exercises With Axial and Rotational Load on Stable and Unstable Surfaces

Cited by 18 publications

References 0 publications

Effect of Five Bench Inclinations on the Electromyographic Activity of the Pectoralis Major, Anterior Deltoid, and Triceps Brachii during the Bench Press Exercise

Effect of Five Bench Inclinations on the Electromyographic Activity of the Pectoralis Major, Anterior Deltoid, and Triceps Brachii during the Bench Press Exercise

Evaluation and comparison of electromyographic activity in bench press with feet on the ground and active hip flexion

Evaluation of a New Rotator Cuff Trainer Based on Oscillating Hydraulic Damping

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