EMG activation of abdominal muscles in the crunch exercise performed with different external loads

Moraes, Antônio Carlos de; Pinto, Ronei Silveira; Valamatos, Maria J.; Pezarat‐Correia, Pedro; Okano, Alexandre Hideki; Santos, P.; Cabri, Jan

doi:10.1016/j.ptsp.2009.01.001

Cited by 17 publications

(11 citation statements)

References 23 publications

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“…This exercise causes the hamstring to extend. During flexion movement, abdominal muscles have higher intensity of activation while lying down 20) . TTE is different from bowing because of the degree of trunk flexion.…”

Section: Discussionmentioning

confidence: 99%

Electromyographic Activity of the Lower Limb Muscles during <i>Salat</i> and Specific Exercises

et al. 2012

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Abstract. [Purpose] This study investigated the activity of the rectus femoris (RF), biceps femoris (BF), tibialis anterior (TA) and gastrocnemius (Gas) muscles of healthy subjects during salat and specific exercises using surface electromyography (EMG).[Methods] A group of undergraduates aged between 19 to 25 years voluntarily participated in this study. For the assessment of the RF muscle, the subjects were asked to perform salat movement [standing to prostration (STP)] and squat exercise (SE) and for the BF, TA and Gas muscles, subjects were asked to perform salat (bowing) and the toe touching exercise (TTE). The electromyograms of the muscles were recorded and analyzed.[Result] The findings indicate that there were contractions of the muscles during the salat and exercises with difference EMG levels. Wilcoxon's Rank Sum Test found a statistically no significant differences between salat and the specific exercises for RF, BF and Gas. For TA, the test revealed a statistically significant difference between salat and the specific exercise with a difference of 5.67%MVC.[Conclusion] Salat may be useful in warm up or in rehabilitation programs. This pilot study conducted initial research into the biomechanical responses of human muscles in various positions of salat.

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Section: Discussionmentioning

confidence: 99%

Electromyographic Activity of the Lower Limb Muscles during <i>Salat</i> and Specific Exercises

et al. 2012

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“…Our findings resemble those of previous EMG studies that demonstrated the efficacy of bent-knee sit-up and crunch exercises in recruiting the rectus abdominis and external/internal oblique muscles. [3][4][5][6][7][8][9][10] The transversus abdominis also shows moderate EMG activity during the crunch exercise. 4,9 On the other hand, the ADC values of the intrinsic back muscles significantly decreased after bent-knee sit-up and crunch exercises.…”

Section: Discussionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11] It is a useful tool but is reported to have some methodological limitations. Surface EMG data may be affected by the confounding myoelectric signal resulting from crosstalk among adjacent muscles, 12,13 variability in the myoelectric signal attributed to subcutaneous tissue, 14 and electrode type and placement.…”

Section: Introductionmentioning

confidence: 99%

Noninvasive Evaluation of Trunk Muscle Recruitment after Trunk Exercises using Diffusion-weighted MR Imaging

et al. 2015

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Purpose: We evaluated trunk muscle recruitment in abdominal and back exercises with magnetic resonance (MR) diffusion-weighted imaging.Methods: Twelve men performed bent-knee sit-up, crunch, trunk lateral flexion, and trunk extension exercises. We obtained axial diffusion-weighted images of the trunk before and after each exercise using a 1.5-tesla MR system, calculated apparent diffusion coefficient (ADC) values from the right and left rectus abdominis, lateral abdominal, psoas major, quadratus lumborum, and intrinsic back muscles to evaluate the activity of these muscles during each exercise, and compared ADC values before and after exercise using a paired t-test.Results: The ADCs of the rectus abdominis (right, +19.1%; left, +11.7%), lateral abdominal (right, +15.5%; left, +14.1%), and psoas major (right, +14.8%; left, +15.9%) muscles on both sides increased after the bent-knee sit-up (P < 0.01). The ADCs of the rectus abdominis (right, +16.8%; left, +10.2%) and lateral abdominal (right, +8.4%; left, +7.0%) muscles on both sides increased after the crunch exercise (P < 0.01). Trunk lateral flexion resulted in increased ADC on only the right side of all of the muscles (rectus abdominis, +12.3%; lateral abdominal muscles, +20.3%; quadratus lumborum, +17.1%; intrinsic back muscles, +12.0%; psoas major, +15.4%) (P < 0.01). The ADCs of the lateral abdominal (right, +5.2%; left, +5.6%), quadratus lumborum (right, +6.0%; left, +3.0%), and intrinsic back (right, +13.2%; left, +14.6%) muscles on both sides were elevated after trunk extension (right lateral abdominal muscles and left quadratus lumborum, P < 0.05; other muscles, P < 0.01).Conclusion: Diffusion-weighted imaging reveals the recruitment patterns of superficial and deep trunk muscles in abdominal and back exercises through exercise-induced activation in intramuscular water movement.

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“…For example, maximum EMG recorded during isometric shoulder abduction has been used to normalize the EMG during submaximal abduction [65], maximum crunch exercise for submaximal crunch exercise [66], maximum sprinting for normalizing the EMG during walking [44,67] and maximum sprint cycling for normalizing the EMG during cycling [38].…”

Section: The Maximum Activation Obtained During the Task Under Investmentioning

confidence: 99%

Normalization of EMG Signals: To Normalize or Not to Normalize and What to Normalize to?

Halaki¹,

Ginn²

2012

Computational Intelligence in Electromyography Analysis - A Perspective on Current Applications and Future Challenges

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173

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EMG activation of abdominal muscles in the crunch exercise performed with different external loads

Cited by 17 publications

References 23 publications

Electromyographic Activity of the Lower Limb Muscles during <i>Salat</i> and Specific Exercises

Electromyographic Activity of the Lower Limb Muscles during <i>Salat</i> and Specific Exercises

Noninvasive Evaluation of Trunk Muscle Recruitment after Trunk Exercises using Diffusion-weighted MR Imaging

Normalization of EMG Signals: To Normalize or Not to Normalize and What to Normalize to?

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