Functional Differences Among Hamstring Muscles in Hip Extension and Knee Flexion Exercises

2015 ◽  
pp. 279-288
Author(s):  
Osamu Yanagisawa
Keyword(s):  
Knee Flexion ◽  
Functional Differences ◽  
Hamstring Muscles ◽  
Hip Extension

Activation of the gluteus maximus and hamstring muscles during prone hip extension with knee flexion in three hip abduction positions

2013 ◽  
Vol 18 (4) ◽  
pp. 303-307 ◽  
Author(s):  
Sun-Young Kang ◽  
Hye-Seon Jeon ◽  
Ohyun Kwon ◽  
Heon-seock Cynn ◽  
Boram Choi
Keyword(s):  
Knee Flexion ◽  
Gluteus Maximus ◽  
Hamstring Muscles ◽  
Hip Abduction ◽  
Hip Extension

Effects of hip rotation on the electromyographic activity of the medial and lateral hamstrings and muscle force

2021 ◽  
pp. 1-7
Author(s):  
Wootaek Lim
Keyword(s):  
Prone Position ◽  
Supine Position ◽  
Knee Flexion ◽  
External Rotation ◽  
Emg Activity ◽  
Electromyographic Activity ◽  
Hamstring Muscles ◽  
Extension Force ◽  
Hip Rotation ◽  
Hip Extension

BACKGROUND: In clinical practice, knee flexion at the prone position for manual muscle testing of hamstrings and hip extension at the supine position for stretching of hamstring muscles are typically proposed. OBJECTIVE: Although different positions have been proposed for different purposes in hamstrings, the understanding of the changing the functional role of hamstrings with position changes is poorly understood. METHODS: The electromyographic (EMG) activity and hip extension force were compared among different postures; hip neutral, internal, and external rotation. EMG and force were measured in prone position during knee flexion and those were additionally measured in supine position during hip extension. In supine position, additional measurements were made in hip neutral, internal and external rotation. RESULTS: Hamstrings showed high EMG activity during knee flexion. Knee flexion force in prone position was significantly decreased at hip extension force in supine position. In supine position, EMG activity was significantly higher in semitendinosus (ST) than biceps femoris (BF) during internal rotation. CONCLUSIONS: It should be noted that bi-articular muscles may have different functional dependencies on the corresponding muscles for each joint. In addition, because the altered alignment of the hamstring muscles that was affected by hip rotation had a significant effect on muscle activity, and hip rotation may be helpful for selective training of medial or lateral hamstrings.

scholarly journals Hamstring Torque, Velocity and Power Elastic Band Measurements during Hip Extension and Knee Flexion

2021 ◽  
Vol 11 (22) ◽  
pp. 10509
Author(s):  
Dario Santos ◽  
Fernando Massa ◽  
Jorge Dominguez ◽  
Isabel Morales ◽  
Juan Del Castillo ◽  
...  
Keyword(s):  
Knee Flexion ◽  
Peak Torque ◽  
Dynamic Monitoring ◽  
Normative Values ◽  
Elastic Band ◽  
Open Chain ◽  
Elastic Resistance ◽  
Hamstring Muscles ◽  
The Difference ◽  
Hip Extension

The quantitative dynamic monitoring of the performance of hamstring muscles during rehabilitation and training cannot currently be undertaken using elastic resistance bands. Hip extension with a fully extended knee involves hamstring agonists, while knee flexion involves only the hamstring. The purpose of this study is to provide normative values of torque, velocity and power involving hamstring muscles opposing elastic bands. Twenty amateur athletes aged 25.7 ± 4.9, were studied during two motor tasks—hip extension and knee flexion, both isometric & dynamic—with an elastic resistance band and DINABANG portable instrument. We compared the peak isometric torque in hip extension with agonists (2.93 Nm/kg) and without them (1.21 Nm/kg): the difference is significant. The peak angular limb velocity—starting at 50% of the maximum torque—is smaller in hip extension with agonists (215.96°/s) than in a knee flexion without them (452.56°/s). The combination of peak torque and peak velocity estimates power and there is no difference (p = 0.051) with and without agonists: 452.56°Nm/s.kg without agonists and 542.13°Nm/s.kg with them. This study opens the possibility of monitoring torque–velocity–power profiles for hamstring exercise in open chain.

scholarly journals Muscle Recruitment Pattern of The Hamstring Muscles in Hip Extension and Knee Flexion Exercises

2020 ◽  
Vol 72 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Osamu Yanagisawa ◽  
Atsuki Fukutani
Keyword(s):  
Knee Flexion ◽  
Biceps Femoris ◽  
Peak Torque ◽  
Total Work ◽  
Recruitment Pattern ◽  
Concentric Contractions ◽  
Hamstring Muscles ◽  
Long Head ◽  
S Peak ◽  
Hip Extension

AbstractWe aimed to compare dynamic exercise performance between hip extension exercises with different knee angles and between knee flexion exercises with different hip angles, and to investigate the recruitment pattern of the hamstrings in each exercise. Seven men performed 4 isokinetic exercises (3 maximal concentric contractions at 30°/s (peak torque) and 30 maximal concentric contractions at 180°/s (total work)): hip extension with the knee fully extended (HEke) and with the knee flexed at 90° (HEkf) and knee flexion with the hip fully extended (KFhe) and with the hip flexed at 90° (KFhf). The recruitment pattern of the hamstrings was evaluated in each exercise using magnetic resonance imaging (T2 calculation). The HEke condition showed significantly greater peak torque than the HEkf condition (p < 0.05). The KFhf condition had significantly greater peak torque and total work values than the KFhe condition (p < 0.05). Although the biceps femoris long head, semitendinosus, and semimembranosus had significantly increased post-exercise T2 values in the HEke (p < 0.05), KFhe, and KFhf conditions (p < 0.01), the T2 increase values were significantly greater under the KFhf than the HEke condition (p < 0.05). The semitendinosus showed a significantly greater T2 increase value than other muscles under both KFhe and KFhf conditions (p < 0.05). Performance of hip extension and knee flexion exercises increases when the hamstring muscles are in a lengthened condition. The hamstring muscles (particularly the semitendinosus) are more involved in knee flexion than in hip extension.

scholarly journals Diferencias cinemáticas del golpeo de fútbol entre futbolistas expertos y sujetos inexpertos (Soccer kick kinematic differences between experienced and non-experienced soccer players)

Retos ◽  
2015 ◽  
pp. 63-66
Author(s):  
Alejandro Muñoz López ◽  
José Antonio González Jurado
Keyword(s):  
Knee Flexion ◽  
Maximum Power ◽  
Soccer Players ◽  
Second Phase ◽  
Film System ◽  
Phase Duration ◽  
Soccer Kick ◽  
The Impact ◽  
Hip Extension

Objetivo: Examinar las diferencias cinemáticas del golpeo con empeine entre futbolistas expertos y sujetos inexpertos. Sujetos: Se analizaron 17 hombres de 17 a 21 años. Metodología: Se utilizó un sistema de fotogrametría 3D con cuatro cámaras. Los sujetos ejecutaron golpeos con el empeine a máxima potencia. Se analizó la Velocidad del Pie en el Impacto, la Máxima Extensión de Cadera, la Máxima Flexión de Rodilla y la Duración de las Fases del gesto. Resultados: Se hallaron diferencias significativas en la Velocidad del Pie de la pierna no hábil en el momento del impacto (m/s) (Expertos: 14,5±.52, Inexpertos: 12.5±.5; p<.001) y Máxima Extensión de Cadera (grados) (Expertos: 39.2±1.3, Inexpertos: 34.28±3.2; p<.001). También hubo diferencias significativas en la Duración de la Fase 2 en ambas piernas (p<.05). Conclusiones: El golpeo con el empeine total en fútbol presenta diferencias significativas entre grupos de diferente nivel tan solo en la pierna no dominante. Palabra clave: golpeo, fútbol, biomecánica, empeine.Abstract: T; Purpose: to examine kinematic differences of instep soccer kick between experienced and non-experienced soccer players. Subjects: 17 men between 17 and 21 years old. Methodology: a 3D film system with 4 cameras was used. Maximum power instep kicks were executed. It was analyzed feet velocity in the impact, maximum hip extension, maximum knee flexion and kick phases duration. Results: were found significant differences in feet velocity with non-dominant leg in the impact moment (m/s) (Experienced: 14.5±.52, Non-experienced: 12.5±.5; p<.001) and maximum hip extension (degrees) (Experienced: 39.2 ± 1.3, Non-experienced: 34.28±3.2; p<.001). Also were significant differences in the second phase duration in both legs (p<.05). Conclusions: Maximum instep soccer kick show significant differences between groups of different level only in non-dominant leg.Key words: kick, soccer, biomechanics, instep.

New Strategies for Controlling Pelvic Transverse Rotation and Selective Activation of Hip Muscles during Prone Hip Extension with Knee Flexion

2021 ◽  
Vol 1 (2) ◽  
pp. 34-41
Author(s):  
Won-Jeong Jeong ◽  
Min-Joo Ko ◽  
Nam-goo Kang ◽  
Eun-Joo Jung ◽  
Jung-Ho Son ◽  
...  
Keyword(s):  
Knee Flexion ◽  
Selective Activation ◽  
Hip Muscles ◽  
Transverse Rotation ◽  
Hip Extension ◽  
New Strategies

Muscle- and Region-Specific Associations Between Muscle Size and Muscular Strength During Hip Extension and Knee Flexion in the Hamstrings

2021 ◽  
pp. 1-6
Author(s):  
Raki Kawama ◽  
Masamichi Okudaira ◽  
Hirohiko Maemura ◽  
Satoru Tanigawa
Keyword(s):  
Knee Flexion ◽  
Muscular Strength ◽  
Sports Injuries ◽  
Biceps Femoris ◽  
Muscle Size ◽  
Cross Sectional ◽  
Long Head ◽  
Hip Extension ◽  
Flexion Strength ◽  
Biceps Femoris Long Head

Context: Strength deficits of the hamstrings following sports injuries decrease athletic performance and increase the risk of injury recurrence. Previous studies have shown a high correlation between the muscular strength during hip-extension and knee-flexion and total muscle size of the hamstrings. However, it remains unclear which region of the individual hamstring muscles is closely associated with muscular strength. Objective: To investigate the relationship between the size of each region of the individual hamstring muscles and muscular strength during hip extension and knee flexion. Design: Within-subject repeated measures. Setting: University laboratory. Participants: Twenty healthy young male volunteers who regularly engaged in sports activities. Outcome Measures: Anatomical cross-sectional areas were acquired from the proximal, middle, and distal regions of the biceps femoris long head, biceps femoris short head, semitendinosus, and semimembranosus. Hip-extension and knee-flexion strength were measured during maximal voluntary isometric and concentric contractions (angular velocities of 60°/s and 180°/s). Results: The anatomical cross-sectional area of the distal regions in biceps femoris long head (r = .525–.642) and semitendinosus (r = .567) were significantly correlated with hip-extension strength under all conditions and only at an angular velocity of 180°/s, respectively. Meanwhile, anatomical cross-sectional areas of the distal regions in biceps femoris short head (r = .587–.684) and semimembranosus (r = .569–.576) were closely associated with knee-flexion strength under all conditions. Conclusion: These results suggest that muscle size in the distal regions of biceps femoris long head and semitendinosus greatly contributes to the production of hip-extension strength, whereas that of biceps femoris short head and semimembranosus significantly contributes to the generation of knee-flexion strength. These findings could be useful for designing training and rehabilitation programs to efficiently improve strength deficits following sports injuries such as strain injury and anterior cruciate ligament tears.

Effects of human stature and muscle strength on the standing strategies: A computational biomechanical study

2020 ◽  
Vol 234 (7) ◽  
pp. 674-685
Author(s):  
Mohammed N Ashtiani ◽  
Mahmood-Reza Azghani ◽  
Mohamad Parnianpour ◽  
Kinda Khalaf
Keyword(s):  
Muscle Strength ◽  
Knee Flexion ◽  
Inverse Dynamics ◽  
Biomechanical Model ◽  
Biomechanical Study ◽  
The Body ◽  
Whole Body ◽  
Tall Stature ◽  
Personal Factors ◽  
Hamstring Muscles

It has been hypothesized that the muscular efforts exerted during standing may be altered by changes in personal factors, such as the body stature and muscular strength. The goal of this work was to assess the contribution of leg muscles using a biomechanical model in different physical conditions and various initial postures. An optimized inverse dynamics model was employed to find the maximum muscular effort in 23,040 postures. The simulation results showed that mid-range knee flexion could help the healthy and strong individuals maintain balance, but those with weaker muscle strength required more knee flexion. Individuals of weak muscular constitution as well as those with tall stature are at the highest risk of imbalance/falling. The number of imbalanced postures due to deficits in the calf and hamstring muscles was reduced by 7.5 times by strengthening the whole body musculature. The calf and the hamstring muscles play a key role in balance regardless of stature.

Electromyography Activity of the Hamstring Muscles during Knee Flexion

2004 ◽  
Vol 36 (Supplement) ◽  
pp. S342???S343
Author(s):  
Akie Nishino ◽  
Yukiko Makihara ◽  
Fuminari Kaneko ◽  
Toru Fukubayashi
Keyword(s):  
Knee Flexion ◽  
Hamstring Muscles

Functional Differences Of The Knee Flexor Muscles During Eccentric Knee Flexion

2005 ◽  
Vol 37 (Supplement) ◽  
pp. S441
Author(s):  
Takashi Ono ◽  
Akie Nishino ◽  
Noriyuki Tawara ◽  
Yuichi Hirano ◽  
Toru Okuwaki ◽  
...  
Keyword(s):  
Knee Flexion ◽  
Knee Flexor ◽  
Functional Differences ◽  
Flexor Muscles
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