Effect of Traditional vs. Modified Bent-Knee Sit-Up on Abdominal and Hip Flexor Muscle Electromyographic Activity

Sullivan, William J.; Gardin, Fredrick A.; Bellon, Christopher R.; Leigh, Steven R.

doi:10.1519/jsc.0000000000001006

Cited by 7 publications

(3 citation statements)

References 18 publications

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“…Logically, this situation would be the normal one, since one of the main functions of the rectus femoris muscle is hip flexion in addition to knee extension. The issue is that the activation of the hip flexor muscles is associated with an increase in shear stress on the lumbar intervertebral discs [43]; in this situation, lumbar problems could be triggered over time [44] so much so that in abdominal strengthening exercises, it is not advisable to activate the hip flexor muscles to decrease the spinal load [45]. In addition, the recommendation is to avoid active hip and knee flexion during exercises that involve the upper limbs [46].…”

Section: Discussionmentioning

confidence: 99%

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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Section: Discussionmentioning

confidence: 99%

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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“…17 Competitive gymnastics is a way to improve the speed of sports through continuous exercise, while mass fitness mainly improves the public's reaction ability and flexibility by increasing the displacement speed. 18,19…”

Section: Tennis Trainingmentioning

confidence: 99%

Application of State-of-the-Art Computer Technology to Strength Training in Tennis Instruction

Pei

Chen

2023

Rev Bras Med Esporte

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Introduction: Strength training plays a unique role in improving muscle strength and stability in athletes. Initially used in rehabilitation, it is now widely used in competitive sports. Objective: To combat the problem of physical exercise capacity and body posture maintenance when tennis players complete several complex movements in training, this article reviews the research on strength training in various countries from the core concept. Methods: Based on the main bones, joints, and muscle groups in the core area, the kinematic characteristics, and the physiological mechanism of these muscle groups, the research model of applying strength training in teaching tennis was established. The application of state-of-the-art computer technology in strength training can be based on data feedback from athletes and their training in tennis training. It can be used for real-time or faster data processing and analysis: data processing is closer to the data source than in an external data center or done in the cloud to reduce lag time. Results: Based on the data, we can carry out the corresponding training plans to help the athletes win the championship. With the methods of literature review, experiment, and comparative analysis, this paper studies the influence of strength training on body shape characteristics, the impact of strength training on technical accuracy characteristics, and the effect of strength training on physical health indicators. Conclusion: The results show that the accuracy of the experimental data is improved by 20%, and the authenticity of the data is more robust, thus of practical value. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

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“…Em função disso, investigações têm sido conduzidas a fim de determinar a maneira mais eficiente e correta de se realizar exercícios abdominais, principalmente por meio da eletromiografia de superfície [6][7][8][9][10] . Esta, segundo Basmajian e De Luca 11 , é o estudo da função muscular a partir da averiguação do sinal elétrico que emana do músculo.…”

Section: Introductionunclassified

Análise eletromiográfica de músculos do abdome e reto femoral em exercícios abdominais com e sem superfície instável

Lizardo

Sousa

Silva

et al. 2018

Rev Bras Educ Fís Esporte

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Os exercícios abdominais são realizados visando a prevenção e/ou reabilitação de dores na região lombar, a melhoria do rendimento atlético, aumento da resistência e força do tronco durante o desempenho das atividades da vida diária e pela estética. Objetivou-se analisar e comparar a atividade eletromiográfica dos músculos rectus abdominis parte superior (RAS) e parte inferior (RAI), obliquus externus abdominis (OE), obliquus internus abdominis (OI) e rectus femoris (RF) durante o exercício abdominal tradicional com e sem a utilização do bosu e bola de ginástica. A amostra foi composta por dez voluntários do gênero masculino, fisicamente ativos e sem distúrbio neuromuscular. A coleta de dados foi realizada utilizando-se eletrodos de superfície diferenciais simples, com ganho de 20 vezes, e registrada por meio de um eletromiógrafo computadorizado. O sinal eletromiográfico foi quantificado pela Raiz Quadrada da Média (Root Mean Square [RMS]) e normalizado (RMSn) pela Contração Isométrica Voluntária Máxima. Os dados foram submetidos à análise estatística paramétrica, empregando-se teste de análise de variância de medidas repetidas (Anova). Os resultados demonstraram que atividade do músculo RAS no exercício com bosu foi significativamente maior em relação ao tradicional (p < 0.05), todavia, não foram encontradas diferenças significativas (p > 0.05) para músculos RAI, OE, OI e RF, entre todos exercícios abdominais (tradicional, bosu e bola de ginástica). Conclui-se que a utilização do bosu no exercício abdominal pode ser um fator desejável e necessário em estágios específicos de programas de reabilitação e/ou treinamento físico, principalmente quando objetiva-se aumentar o recrutamento da parte superior do músculo rectus abdominis (RAS).

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Effect of Traditional vs. Modified Bent-Knee Sit-Up on Abdominal and Hip Flexor Muscle Electromyographic Activity

Cited by 7 publications

References 18 publications

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

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

Application of State-of-the-Art Computer Technology to Strength Training in Tennis Instruction

Análise eletromiográfica de músculos do abdome e reto femoral em exercícios abdominais com e sem superfície instável

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