Hip and thigh muscular activity in professional soccer players during an isometric squat with and without controlled hip contraction  (Actividad muscular de cadera y muslo en jugadores de fútbol profesionales durante una sentadilla isométrica con y sin co

Rojas-Quinchavil, Gabriel; Venegas-Jeldrez, Pablo; Valencia, O.; Guzmán-Venegas, Rodrigo; Araneda, Oscar F.; Rosa, Francisco José Berral de la; Flores-Leon, Andres Felipe

doi:10.47197/retos.v0i39.82024

Cited by 3 publications

(3 citation statements)

References 73 publications

(78 reference statements)

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“…Isometric strength training (IST) is an important component of different types of training activity and others activities of daily life (Lac & Cavalie, 1999;Rojas-Quinchavil et al, 2021). Despite this, little is known about the physiological effects of this type of exercise.…”

Section: Introductionmentioning

confidence: 99%

Isometric training promotes changes in acetylcholinesterase and muscle strength

Rodrigues da Conceição,

Laureano-Melo,

Da Silva Almeida

et al. 2024

Retos

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Introduction: Isometric strength training (IST) is an important component of different types of sport and others activities of daily life. However, until the present moment, no studies have linked the isometric strength training with acetylcholinesterase (AChE) activity changes. Objective: We evaluated the effects of IST on the muscular AChE activity and strength. Materials and Methods: Wistar rats (n =20) were divided into 2 groups: Control group (Ctr) (sedentary) and trained group (Tr) (submitted to 8 weeks of Isometric strength training). The muscle strength and the acetylcholinesterase activity were evaluated in the solear (SOL) and Extensor Digitorum Longus (EDL) muscles. Results: The body weight of the trained animals was 7.39 % lower than in Ctr rats (p < 0.01) and the EDL weight was 25 % higher (p < 0.05) compared to Ctr. Further, an increase of 30.36 % in strength was observed in the fourth week (p < 0.006) and 26.41 % in eighth week (p < 0.003) of training. In addition, we found an increase of 46.64% in AChE activity in the SOL. In contrast, a reduction of 55.36% in AChE activity in the EDL was observed. Conclusion: Our findings indicate that biochemical, zoometric and functional changes can be evoked by IST with low overload. Keywords: Isometric Strength Training, Solear, Extensor Digitorum Longus and Enzyme.

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Section: Introductionmentioning

confidence: 99%

Isometric training promotes changes in acetylcholinesterase and muscle strength

Rodrigues da Conceição,

Laureano-Melo,

Da Silva Almeida

et al. 2024

Retos

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“…La musculatura de miembro inferior es una de las más estudiadas debido a la cantidad de lesiones que se producen a este nivel, varios autores han realizado estudios de imagen para poder determinar los ejercicios que más gasto y demanda energética producen, y dentro de sus investigaciones mencionan a los músculos de los isquiotibiales (Rojas-Quinchavil et al, 2021). Chang et al, 2020, enfatizan en sus análisis, la identificación del complejo muscular de los isquiotibiales, como un punto importante en la valoración del deportista, debido a que representan entre el 12% y el 26% de todas las lesiones sufridas durante las actividades deportivas; otros estudios encuentran que los miembros inferiores son los más lesionados con un 54,2% de riesgo de lesión y específicamente el 23,7% en musculatura isquiotibial (Penichet-Tomás et al, 2019).…”

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Análisis del protocolo de curl nórdico de isquiotibiales en la flexibilidad de los deportistas (Analysis of the Nordic curl protocol in the flexibility of athletes)

Paredes-Gómez

Moya²

2023

Retos

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Los ejercicios nórdicos son considerados estándar de oro e indicados para el aumento de la fuerza excéntrica y la prevención de lesiones, sin embargo, su aplicación debe estar enfocada a diversas disciplinas deportivas, por lo que el objetivo de este estudio fue analizar los efectos del entrenamiento sobre la flexibilidad. de deportistas de fútbol, baloncesto, atletismo, ciclismo, taekwondo y escalada deportiva. Para ello, se analizaron 60 deportistas que cumplieron con los criterios de inclusión, con una edad de 19±1,8, divididos entre el grupo control (31) y el grupo experimental (29); mismos que fueron evaluados en forma inicial y final con el test de Sit and Reach. Se aplicó un entrenamiento que incluía los ejercicios nórdicos durante 7 semanas en el grupo experimental y el grupo control continuó con su entrenamiento establecido, posteriormente fueron evaluados pasado el tiempo mencionado.Los resultados obtenidos muestran la utilidad de este entrenamiento para aumentar la flexibilidad, ya que se evidenció un aumento significativo (P=<0,05) en el grupo experimental entre la evaluación inicial y final, a diferencia del grupo control (P=>0,05), sin embargo , en escalada y atletismo se obtuvieron diferencias significativas (P=<0,05) tras el entrenamiento con ejercicios nórdicos. A partir de estos datos se pudo evidenciar que el entrenamiento permite un aumento de la flexibilidad en los practicantes, por lo que se recomienda incluirlos en entrenamientos y tratamientos deportivos donde la finalidad sea aumentar esta capacidad física, especialmente en deportes como el atletismo y escalada donde hay demandas de amplitud de movimiento para llevar a cabo el gesto deportivo. Palabras clave: Flexibilidad, Isquiotibiales, Nórdico, Curl Nórdico. Abstract. Nordic exercises are considered gold standard and indicated for increasing eccentric strength and injury prevention, however, their application should be focused on various sports disciplines, so the objective of this study was to analyze the effects of training on flexibility. of soccer, basketball, athletics, cycling, taekwondo and sport climbing athletes. For this purpose, 60 athletes who met the inclusion criteria were analyzed, with an age of 19±1.8, divided between the control group (31) and the experimental group (29); same that were evaluated in initial and final form with the test of Sit and Reach. A training that included the Nordic exercises was applied for 7 weeks in the experimental group and the control group continued with their established training, later they were evaluated after the mentioned time. The results obtained show the usefulness of this training to increase flexibility, since a significant increase (P=<0.05) was evi-denced in the experimental group between the initial and final evaluation, unlike the control group ( P=>0.05), however, in climbing and athletics, significant differences (P=<0.05) were obtained after training with Nordic exercises. From these data, it was possible to show that the training allows an increase in flexibility in the trainees, so it is recommended to include them in sports training and treatments where the purpose is to increase this physical capacity, especially in sports such as athletics and climbing where there are demands for range of motion to carry out the sporting gesture. Keywords: Flexibility, Hamstrings, Nordic, Nordic Curl.

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“…Importantly, even though many studies have commonly used the ratios between agonist/antagonist muscle activity to describe the levels of co‐activation during dynamic tasks (e.g. gait, trunk and hip movements) (Aslan, Batur, & Meray, 2020; Rojas‐Quinchavil et al, 2021; Tretriluxana, Nanbancha, Sinsurin, Limroongreungrat, & Wang, 2021; Vanderstukken, Borms, Berckmans, Spanhove, & Cools, 2020), there are currently no studies evaluating co‐activation using the whole time series of a task by using SPM.…”

Section: Introductionmentioning

confidence: 99%

Temporal differences in the myoelectric activity of lower limb muscles during rearfoot and forefoot running: A statistical parametric mapping approach

Valencia

Weinstein

Salas

et al. 2022

European Journal of Sport Science

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Forefoot (FF) and rearfoot (RF) running techniques can induce different lower-limb muscle activation patterns. However, few studies have evaluated temporal changes in the electromyographic activity (EMG) of lower limb muscles during running. The aim of this study was to compare temporal changes in EMG amplitude between RF and FF running techniques. Eleven recreational runners ran on a treadmill at a self-selected speed, once using a RF strike pattern and once using a FF strike pattern (randomized order). The EMG of five lower limb muscles [rectus femoris (RFe), biceps femoris (BF), tibialis anterior (TA), medial and lateral gastrocnemius (MG and LG)] was evaluated, using bipolar electrodes. EMG data from the RF and FF running techniques was then processed and compared with statistical parametric mapping (SPM), dividing the analysis of the running cycle into stance and swing phases. The MG and LG muscles showed higher activation during FF running at the beginning of the stance phase and at the end of the swing phase. During the end of the swing phase, the TA muscle's EMG amplitude was higher, when the RF running technique was used. A higher level of co-activation between the gastrocnemius and TA muscles was observed in both stance and swing phases using RF. The myoelectric behaviour of the RFe and BF muscles was similar during both running techniques. The current findings highlight that the two running techniques predominately reflect adjustments of the shank and not the thigh muscles, in both phases of the running cycle. Highlights. Statistical parametric mapping (SPM) can reveal temporal differences in muscle activity between running techniques. . The medial and lateral gastrocnemius muscles were more active at specific time-instants of the initial stance and late swing phases during forefoot (FF) running compared to rearfoot (RF) running. . Higher activation was observed for the tibialis anterior muscle at the end of the swing phase during RF running . Contrary to the muscle activity differences observed in the leg muscles, the muscle activity of the thigh muscles was similar during RF and FF running.

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Hip and thigh muscular activity in professional soccer players during an isometric squat with and without controlled hip contraction (Actividad muscular de cadera y muslo en jugadores de fútbol profesionales durante una sentadilla isométrica con y sin co

Cited by 3 publications

References 73 publications

Isometric training promotes changes in acetylcholinesterase and muscle strength

Isometric training promotes changes in acetylcholinesterase and muscle strength

Análisis del protocolo de curl nórdico de isquiotibiales en la flexibilidad de los deportistas (Analysis of the Nordic curl protocol in the flexibility of athletes)

Temporal differences in the myoelectric activity of lower limb muscles during rearfoot and forefoot running: A statistical parametric mapping approach

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