Electromyographic analysis of muscle activation during pull-up variations

2017 ◽  
Vol 32 ◽  
pp. 30-36 ◽  
Author(s):  
James A. Dickie ◽  
James A. Faulkner ◽  
Matthew J. Barnes ◽  
Sally D. Lark
Keyword(s):  
Muscle Activation ◽  
Electromyographic Analysis

scholarly journals Surface electromyographic analysis of the serratus anterior during 1 bench press variations

2019 ◽  
Author(s):  
Kyle L Rogers ◽  
Alex Caravan ◽  
John Scheffey ◽  
Kyle J Boddy
Keyword(s):  
Muscle Strength ◽  
Isometric Contraction ◽  
Surface Electromyography ◽  
Muscle Activation ◽  
Bench Press ◽  
Professional Baseball ◽  
Serratus Anterior Muscle ◽  
Serratus Anterior ◽  
Surface Electrodes ◽  
Electromyographic Analysis

Purpose: Bench press variations that elicit greater serratus anterior muscle activation may be preferable for improving scapula stability and avoiding injury in overhead throwing athletes. Here we compare serratus anterior activity during dumbbell and barbell bench press using surface electromyography (EMG). Methods: Forty college and professional baseball pitchers (men, age 22.6 ± 2.5 years) performed four sets of bench press—light (43 kg) and heavy (61 kg) dumbbell and barbell—with five repetitions each. Each pitcher was instructed in proper technique and rested for 90 seconds between sets. Surface electrodes were used to record serratus anterior activity during isometric contraction (for normalization) and during each set. Results: Dumbbell sets showed significantly greater serratus anterior activation than barbell sets at both weights (weight-normalized mean EMG amplitude, 44.7 versus 38.2; p = .005).Conclusion: This suggests that dumbbell press is preferable to barbell press for building serratus anterior muscle strength.

Dominant vs. nondominant arm advantage in mentally simulated actions in right handers

2013 ◽  
Vol 110 (12) ◽  
pp. 2887-2894 ◽  
Author(s):  
Philippe Gandrey ◽  
Christos Paizis ◽  
Vassilis Karathanasis ◽  
Nicolas Gueugneau ◽  
Charalambos Papaxanthis
Keyword(s):  
Muscle Activation ◽  
Biceps Brachii ◽  
Motor Evoked Potentials ◽  
Arm Movements ◽  
Mental States ◽  
Arm Muscles ◽  
Electromyographic Analysis ◽  
The Right ◽  
Movement Simulation ◽  
Mental Actions

Although plentiful data are available regarding mental states involving the dominant-right arm, the evidence for the nondominant-left arm is sparse. Here, we investigated whether right-handers can generate accurate predictions with either the right or the left arm. Fifteen adults carried out actual and mental arm movements in two directions with varying inertial resistance (inertial anisotropy phenomenon). We recorded actual and mental movement times and used the degree of their similarity as an indicator for the accuracy of motor imagery/prediction process. We found timing correspondences (isochrony) between actual and mental right arm movements in both rightward (low inertia resistance) and leftward (high inertia resistance) directions. Timing similarities between actual and mental left arm movements existed for the leftward direction (low inertia resistance) but not for the rightward direction (high inertia resistance). We found similar results when participants reaching towards the midline of the workspace, a result that excludes a hemispace effect. Electromyographic analysis during mental movements showed that arm muscles remained inactivate, thus eliminating a muscle activation strategy that could explain intermanual differences. Furthermore, motor-evoked potentials enhancement in both right and left biceps brachii during mental actions indicated that subjects were actively engaged in mental movement simulation and that the disadvantage of the left arm cannot be attributed to the nonactivation of the right motor cortex. Our findings suggest that predictive mechanisms are more robust for the right than the left arm in right-handers. We discussed these findings from the perspective of the internal models theory and the dynamic-dominance hypothesis of laterality.

ELECTROMYOGRAPHIC ANALYSIS OF MUSCLE ACTIVATION OF THE TRUNK AND LOWER LIMBS DURING HUMAN GAIT AND HIPPOTHERAPY USING DIFFERENT RIDE MOUNT MATERIALS

2021 ◽  
Author(s):  
Silva Monisa Alves Borges ◽  
Lupianhes Ana Flávia Garrido ◽  
Lage Janaine Brandão ◽  
Sande Luciane Aparecida Pascucci ◽  
Rosa Rodrigo César ◽  
...  
Keyword(s):  
Muscle Activation ◽  
Lower Limbs ◽  
Human Gait ◽  
Electromyographic Analysis

scholarly journals Trunk Muscle Activation Patterns During Standing Turns in Patients With Stroke: An Electromyographic Analysis

2021 ◽  
Vol 12 ◽  
Author(s):  
I-Hsuan Chen ◽  
Pei-Jung Liang ◽  
Valeria Jia-Yi Chiu ◽  
Shu-Chun Lee
Keyword(s):  
Muscle Activation ◽  
Trunk Muscle ◽  
Erector Spinae ◽  
Trunk Muscles ◽  
Trunk Control ◽  
Activation Patterns ◽  
Muscle Activation Patterns ◽  
Paretic Side ◽  
External Oblique ◽  
Electromyographic Analysis

Recent evidence indicates that turning difficulty may correlate with trunk control; however, surface electromyography has not been used to explore trunk muscle activity during turning after stroke. This study investigated trunk muscle activation patterns during standing turns in healthy controls (HCs) and patients with stroke with turning difficulty (TD) and no TD (NTD). The participants with stroke were divided into two groups according to the 180° turning duration and number of steps to determine the presence of TD. The activation patterns of the bilateral external oblique and erector spinae muscles of all the participants were recorded during 90° standing turns. A total of 14 HCs, 14 patients with TD, and 14 patients with NTD were recruited. The duration and number of steps in the turning of the TD group were greater than those of the HCs, independent of the turning direction. However, the NTD group had a significantly longer turning duration than did the HC group only toward the paretic side. Their performance was similar when turning toward the non-paretic side; this result is consistent with electromyographic findings. Both TD and NTD groups demonstrated increased amplitudes of trunk muscles compared with the HC groups. Their trunk muscles failed to maintain consistent amplitudes during the entire movement of standing turns in the direction that they required more time or steps to turn toward (i.e., turning in either direction for the TD group and turning toward the paretic side for the NTD group). Patients with stroke had augmented activation of trunk muscles during turning. When patients with TD turned toward either direction and when patients with NTD turned toward the paretic side, the flexible adaptations and selective actions of trunk muscles observed in the HCs were absent. Such distinct activation patterns during turning may contribute to poor turning performance and elevate the risk of falling. Our findings provide insights into the contribution and importance of trunk muscles during turning and the association with TD after stroke. These findings may help guide the development of more effective rehabilitation therapies that target specific muscles for those with TD.

scholarly journals An Electromyographic Analysis of Lateral Raise Variations and Frontal Raise in Competitive Bodybuilders

2020 ◽  
Vol 17 (17) ◽  
pp. 6015
Author(s):  
Giuseppe Coratella ◽  
Gianpaolo Tornatore ◽  
Stefano Longo ◽  
Fabio Esposito ◽  
Emiliano Cè
Keyword(s):  
Confidence Interval ◽  
Effect Size ◽  
Muscle Activation ◽  
External Rotation ◽  
Pectoralis Major ◽  
Mean Square ◽  
Triceps Brachii ◽  
Upper Trapezius ◽  
Anterior Deltoid ◽  
Electromyographic Analysis

The present study examined the muscle activation in lateral raise with humerus rotated externally (LR-external), neutrally (LR-neutral), internally (LR-internal), with flexed elbow (LR-flexed) and frontal raise during both the concentric and eccentric phase. Ten competitive bodybuilders performed the exercises. Normalized surface electromyographic root mean square (sEMG RMS) was obtained from anterior, medial, and posterior deltoid, pectoralis major, upper trapezius, and triceps brachii. During the concentric phase, anterior deltoid and posterior deltoid showed greater sEMG RMS in frontal raise (effect size (ES)-range: 1.78/9.25)) and LR-internal (ES-range: 10.79/21.34), respectively, vs. all other exercises. Medial deltoid showed greater sEMG RMS in LR-neutral than LR-external (ES: 1.47 (95% confidence-interval—CI: 0.43/2.38)), frontal raise (ES: 10.28(95% CI: 6.67/13.01)), and LR-flexed (ES: 6.41(95% CI: 4.04/8.23)). Pectoralis major showed greater sEMG RMS in frontal raise vs. all other exercises (ES-range: 17.2/29.5), while upper trapezius (ES-range: 2.66/7.18) and triceps brachii (ES-range: 0.41/3.31) showed greater sEMG RMS in LR-internal vs. all other exercises. Similar recruitment patterns were found during the eccentric phase. When humerus rotates internally, greater activation of posterior deltoid, triceps brachii, and upper trapezius occurs. Humerus external rotation increases the activation of anterior and medial deltoid. Frontal raise mainly activates anterior deltoid and pectoralis major. LR variations and frontal raise activate specifically shoulders muscles and should be proposed accordingly.

scholarly journals Influence of age on postural control during dual task: a centre of pressure motion and electromyographic analysis

2021 ◽  
Author(s):  
Enrico Roma ◽  
Stefano Gobbo ◽  
Valentina Bullo ◽  
Fabiola Spolaor ◽  
Zimi Sawacha ◽  
...  
Keyword(s):  
Postural Control ◽  
Dual Task ◽  
Secondary Task ◽  
Muscle Activation ◽  
Cognitive Task ◽  
Erector Spinae ◽  
Centre Of Pressure ◽  
Eyes Closed ◽  
Main Effect ◽  
Electromyographic Analysis

Abstract Background Dual task influences postural control. A cognitive task seems to reduce muscle excitation during a postural balance, especially in older adults (OA). Aim The aim of this study is to evaluate the effect of three cognitive tasks on muscle excitation and static postural control in OA and young adults (YA) in an upright posture maintenance task. Methods 31 YA and 30 OA were evaluated while performing a modified Romberg Test in five different conditions over a force plate: open eyes, closed eyes, spatial-memory brooks’ test, counting backwards aloud test and mental arithmetic task. The surface electromyographic signals of Tibialis anterior (TA), Lateral Gastrocnemius (GL), Peroneus Longus (PL), and Erector Spinae (ES) was acquired with an 8-channel surface electromyographic system. The following variables were computed for both the electromyographic analysis and the posturographic assessment: Root mean square (RMS), centre of pressure (CoP) excursion (Path) and velocity, sway area, RMS of the CoP Path and 50%, 95% of the power frequency. Mixed ANOVA was used to detect differences with group membership as factor between and type of task as within. The analysis was performed on the differences between each condition from OE. Results An interaction effect was found for Log (logarithmic) Sway Area. A main effect for task emerged on all posturographic variables except Log 95% frequencies and for Log PL and ES RMS. A main effect for group was never detected. Discussion and conclusion This study indicates a facilitating effect of mental secondary task on posturographic variables. Non-silent secondary task causes increase in ES and TA muscle activation and a worsening in static postural control performance.

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