scholarly journals The Indirect Role of Gluteus Medius Muscle in Knee Joint Stability during Unilateral Vertical Jump and Landing on Unstable Surface in Young Trained Males

2021 ◽  
Vol 11 (16) ◽  
pp. 7421
Author(s):  
Balázs Sebesi ◽  
Ádám Fésüs ◽  
Mátyás Varga ◽  
Tamás Atlasz ◽  
Kitty Vadász ◽  
...  
Keyword(s):  
Knee Joint ◽  
Vastus Lateralis ◽  
Cruciate Ligament ◽  
Vertical Jump ◽  
Gluteus Medius ◽  
Biceps Femoris ◽  
Jump Performance ◽  
Unstable Surface ◽  
Flexion Extension ◽  
Hip Abduction

(1) In the present investigation, we tested the hypothesis that unilateral countermovement jump performance is associated with knee joint stabilization ability during unilateral landing on unstable surface. (2) Twenty-five male sport students were tested for dynamometric knee extension and flexion, and hip abduction isometric strength. Myolectric activity of vastus lateralis and medialis, gluteus medius, and biceps femoris muscles were measured during unilateral countermovement vertical jump performed on a force plate, and during unilateral landing on unstable surface. (3) Vertical jump impulse negatively correlated with biceps femoris activation at landing. Participants with greater hip abduction force performed greater vertical jump impulse, and activated the biceps femoris less when landing on unstable surface. Furthermore, participants with smaller knee flexion/extension torque ratio increased biceps femoris/vastus medialis activation ratio at landing. (4) We conclude that hip abduction strength is an important contributor to unilateral vertical jump performance. Because biceps femoris is considered the synergist of the anterior cruciate ligament, we also propose that hip abductors are primary frontal plane protectors of the knee joint by reducing knee valgus and stress, allowing for smaller biceps femoris co-activation (secondary protection) at landing on unstable surface.

scholarly journals Neuromuscular Changes After Aerobic Exercise in People with Anterior Cruciate Ligament– Reconstructed Knees

2011 ◽  
Vol 46 (5) ◽  
pp. 476-483 ◽  
Author(s):  
Elizabeth C. Dalton ◽  
Kate R. Pfile ◽  
Gerald R. Weniger ◽  
Christopher D. Ingersoll ◽  
Daniel Herman ◽  
...  
Keyword(s):  
Aerobic Exercise ◽  
Muscle Activation ◽  
Dynamic Balance ◽  
Cruciate Ligament ◽  
Vertical Jump ◽  
Gluteus Medius ◽  
Gluteus Medius Muscle ◽  
Vertical Jump Height ◽  
Hip Abduction ◽  
Anterior Cruciate

Context: Anterior cruciate ligament (ACL) reconstructions are common, especially in young, active people. The lower extremity neuromuscular adaptations seen after aerobic exercise provide information about how previously injured patients perform and highlight deficits and, hence, areas for focused treatment. Little information is available about neuromuscular performance after aerobic exercise in people with ACL reconstructions. Objective: To compare dynamic balance, gluteus medius muscle activation, vertical jump height, and hip muscle strength after aerobic exercise in people with ACL-reconstructed knees. Design: Case-control study. Setting: Research laboratory. Patients or Other Participants: Of 34 recreationally active volunteers, 17 had a unilateral primary ACL reconstruction at least 2 years earlier and 17 were matched controls. Intervention(s): All participants performed 20 minutes of aerobic exercise on a treadmill. Main Outcome Measure(s): We recorded dynamic, single-legged balance electromyographic gluteus medius muscle activation, single-legged vertical jump height, and maximum isometric strength for hip abduction, extension, and external rotation preexercise and postexercise. Results: Participants with ACL reconstructions exhibited shorter reach distances during dynamic balance tasks, indicating poorer dynamic balance, and less gluteus medius muscle electromyographic activation. Reductions in hip abduction and extension strength after exercise were noted in all participants; however, those with ACL reconstructions displayed greater hip extensor strength loss after aerobic exercise than did the control group. Conclusions: Neuromuscular changes after aerobic exercise exist in both patients with ACL reconstructions and controls. The former group may experience greater deficits in hip extensor strength after aerobic exercise. Reduced reach distances in people with ACL reconstructions may represent a protective mechanism against excessive tibiofemoral rotation during dynamic balance. Clinicians should identify weaknesses in the resting state and after aerobic exercise in recreationally active patients and those with ACL reconstructions.

scholarly journals The Gluteus Medius Vs. Thigh Muscles Strength Ratio and Their Relation to Electromyography Amplitude During a Farmer’s Walk Exercise

2015 ◽  
Vol 45 (1) ◽  
pp. 157-165 ◽  
Author(s):  
Petr Stastny ◽  
Michal Lehnert ◽  
Amr Zaatar ◽  
Zdenek Svoboda ◽  
Zuzana Xaverova ◽  
...  
Keyword(s):  
Vastus Lateralis ◽  
Knee Injuries ◽  
Gluteus Medius ◽  
Biceps Femoris ◽  
Moderate Intensity ◽  
Strength Ratio ◽  
Moderate Amount ◽  
Muscle Involvement ◽  
Maximum Voluntary Isometric Contraction ◽  
Flexion Extension

Abstract The strength ratio between hamstrings and quadriceps (H/Q) is associated with knee injuries as well as hip abductor muscle (HAB) weakness. Sixteen resistance trained men (age, 32.5 ± 4.2 years) performed 5 s maximal isometric contractions at 75° of knee flexion/extension and 15° of hip abduction on a dynamometer. After this isometric test they performed a Farmer´s walk exercise to find out if the muscle strength ratio predicted the electromyography amplitude expressed as a percentage of maximum voluntary isometric contraction (%MVIC). The carried load represented a moderate intensity of 75% of the exercise six repetitions maximum (6RM). Electromyography data from the vastus medialis (VM), vastus lateralis (VL), biceps femoris (BF) and gluteus medius (Gmed) on each leg were collected during the procedure. The groups selected were participants with H/Q ≥ 0.5, HQ < 0.5, HAB/H ≥ 1, HAB/H < 1, HAB/Q ≥ 0.5 and HAB/Q < 0.5. One way ANOVA showed that Gmed activity was significantly greater in the group with HAB/H < 1 (42 ± 14 %MVIC) as compared to HAB/H ≥ 1 (26 ± 10 %MVIC) and HAB/Q < 0.5 (47 ± 19 %MVIC) compared to HAB/Q ≥ 0.5 (26 ± 12 %MVIC). The individuals with HAB/H < 1 were found to have greater activation of their Gmed during the Farmer’s walk exercise. Individuals with HAB/Q < 0.5 had greater activation of the Gmed. Gmed strength ratios predict the muscle involvement when a moderate amount of the external load is used. The Farmer’s walk is recommended as an exercise which can strengthen the gluteus medius, especially for individuals with a HAB/H ratio < 1 and HAB/Q < 0.5.

scholarly journals EFFECTS OF TRADITIONAL STRENGTH TRAINING AND OLYMPIC WEIGHTLIFTING IN HANDBALL PLAYERS

2019 ◽  
Vol 25 (3) ◽  
pp. 230-234
Author(s):  
Bárbara Slovak ◽  
Leandro Carvalho ◽  
Fernando Rodrigues ◽  
Paulo Costa Amaral ◽  
Deborah Duarte Palma ◽  
...  
Keyword(s):  
Strength Training ◽  
Vastus Lateralis ◽  
Vertical Jump ◽  
Gluteus Maximus ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Level Of Evidence ◽  
Jump Performance ◽  
Plyometric Exercise ◽  
Regular Training

ABSTRACT Introduction Olympic weightlifting has been adopted as an alternative to plyometric exercise. However, the effects of these exercises in young handball athletes is not known. Objective To compare the effect of Olympic weightlifting training with traditional strength training on jumping, squatting and acceleration performance in young handball athletes. Ten female handball athletes were evaluated. After six weeks of regular training, the athletes underwent eight weeks of training specifically designed for the survey, with equivalence of the total volume of training and differences in the means used. The evaluations were performed after six weeks of regular training (Baseline), after four weeks of traditional strength training and after four weeks of Olympic weightlifting. Vertical Jumps with and without movement of the arms, acceleration of 10 m, 20 m and 30 m, and 1RM in squatting were quantified. Results Increases (p<0.05) were observed in accelerations and squatting in the Olympic weightlifting and in squatting in the traditional strength training. Differences in coordination, time to activation of the gastrocnemius, vastus lateralis, rectus femoris, biceps femoris and gluteus maximus, peak force and power and rate of force development between the jumps and exercises used in the training are hypotheses to be considered for the different responses adaptations found in the jumps. Conclusion The Olympic weightlifting training resulted in an increase in accelerations and strength, but not in vertical jump performance in young handball athletes. Level of Evidence I; Prognostic Studies - Investigation of the Effect of a Patient Characteristic on Disease Outcome.

scholarly journals 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

Retos ◽  
2020 ◽  
pp. 697-704
Author(s):  
Gabriel Rojas-Quinchavil ◽  
Pablo Venegas-Jeldrez ◽  
Oscar Valencia ◽  
Rodrigo Guzmán-Venegas ◽  
Oscar Florencio Araneda ◽  
...  
Keyword(s):  
Vastus Lateralis ◽  
Muscular Activity ◽  
Gluteus Medius ◽  
Biceps Femoris ◽  
Fascia Lata ◽  
Soccer Players ◽  
Healthy Male ◽  
Professional Soccer ◽  
Hip Abduction ◽  
Tensor Fasciae Latae

  The purpose of the present investigation was twofold 1) To compare the hip and thigh muscular activity of professional soccer players when performing the isometric squat with and without controlled hip contraction; 2) To determine the muscular relationships that take place during these methods of execution of the exercise. Methods: 11 healthy male professional soccer players, randomly performed three modalities of isometric squat at a 60° knee flexion: conventional squat (SQ), squat with hip abduction contraction (SQ-ABD) and squat with hip adduction contraction (SQ-ADD), controlled at 70% of 1 maximum repetition. The activity of the gluteus medius (GM), tensor fasciae latae (TFL), vastus medialis (VM), vastus lateralis (VL), semitendinosus (ST) and biceps femoris (BF) was obtained through surface electromyography. Hip (GM/TFL), quadriceps (VM/VL) hamstrings (ST/BF), and hamstrings/quadriceps (H/Q) ratios were analyzed. Results: GM increases in SQ-ABD and SQ-ADD compared to SQ (p<.01). The TFL, VL, SM and BF muscles have significantly higher activity in SQ-ADD compared to SQ (p<.05). The VL, VM and BF muscles significantly increase their activity in SQ-ADD compared to SQ-ABD (p <0.05). GM/TFL, VM/VL and ST/BF do not show significant differences between the three isometric squat methods. The H/Q ratio was higher in SQ-ABD and SQ-ADD compared to SQ (p<.01). Conclusion: The squat with hip adduction contraction in a controlled manner increases the muscular activity of the hip and thigh. Performing this combined maneuver can have benefits in sports training and rehabilitation because it increases the H/Q ratio of soccer players.  Resumen. El propósito de la presente investigación fue doble: 1) Comparar la actividad muscular de la cadera y el muslo de los futbolistas profesionales cuando realizan sentadillas isométricas con y sin contracción controlada de la cadera; 2) Determinar las relaciones musculares que tienen lugar durante estas modalidades de ejecución del ejercicio. Metodología: 11 jugadores de fútbol profesionales sanos, realizaron al azar tres modalidades de sentadilla isométrica con una flexión de rodilla de 60 °: sentadilla convencional (SQ), sentadilla con contracción de abducción de cadera (SQ-ABD) y sentadilla con contracción de aducción de cadera (SQ-ADD), controladas al 70% de 1 repetición máxima. La actividad del glúteo medio (GM), el tensor de la fascia lata (TFL), el vasto medial (VM), el vasto lateral (VL), el semitendinoso (ST) y el bíceps femoral (BF) se obtuvo mediante electromiografía de superficie. Se analizaron las relaciones de los músculos de la cadera (GM/TFL), cuádriceps (VM / VL), isquiotibiales (ST/BF) e isquiotibiales/cuádriceps (H/Q). Resultados: GM aumenta en SQ-ABD y SQ-ADD en comparación con SQ (p<.01). Los músculos TFL, VL, SM y BF tienen una actividad significativamente mayor en SQ-ADD en comparación con SQ (p<.05). Los músculos VL, VM y BF aumentan significativamente su actividad en SQ-ADD en comparación con SQ-ABD (p <.05). GM/TFL, VM/VL y ST/BF no muestran diferencias significativas entre los tres métodos de sentadilla isométrica. La relación H/Q fue mayor en SQ-ABD y SQ-ADD en comparación con SQ (p<.01). Conclusión: La sentadilla con contracción de aducción de cadera de manera controlada aumenta la actividad muscular de la cadera y el muslo. La realización de esta maniobra combinada puede tener beneficios en el entrenamiento deportivo y la rehabilitación porque aumenta la relación H / Q de los jugadores de fútbol.

scholarly journals The Effects of External Loads and Muscle Forces on the Knee Joint Ligaments during Walking: A Musculoskeletal Model Study

2021 ◽  
Vol 11 (5) ◽  
pp. 2356
Author(s):  
Carlo Albino Frigo ◽  
Lucia Donno
Keyword(s):  
Knee Joint ◽  
Cruciate Ligament ◽  
Musculoskeletal Model ◽  
Optimization Approach ◽  
Muscle Forces ◽  
Collateral Ligaments ◽  
Flexion Extension ◽  
Lateral Collateral Ligaments ◽  
Gastrocnemius Muscles ◽  
External Loads

A musculoskeletal model was developed to analyze the tensions of the knee joint ligaments during walking and to understand how they change with changes in the muscle forces. The model included the femur, tibia, patella and all components of cruciate and collateral ligaments, quadriceps, hamstrings and gastrocnemius muscles. Inputs to the model were the muscle forces, estimated by a static optimization approach, the external loads (ground reaction forces and moments) and the knee flexion/extension movement corresponding to natural walking. The remaining rotational and translational movements were obtained as a result of the dynamic equilibrium of forces. The validation of the model was done by comparing our results with literature data. Several simulations were carried out by sequentially removing the forces of the different muscle groups. Deactivation of the quadriceps produced a decrease of tension in the anterior cruciate ligament (ACL) and an increase in the posterior cruciate ligament (PCL). By removing the hamstrings, the tension of ACL increased at the late swing phase, while the PCL force dropped to zero. Specific effects were observed also at the medial and lateral collateral ligaments. The removal of gastrocnemius muscles produced an increase of tension only on PCL and lateral collateral ligaments. These results demonstrate how musculoskeletal models can contribute to knowledge about complex biomechanical systems as the knee joint.

Reciprocal Coactivation Patterns of the Lateral and Medial Quadriceps and Hamstrings during Low- and Moderate-Speed Isokinetic Movement

1998 ◽  
Vol 7 (3) ◽  
pp. 182-196 ◽  
Author(s):  
Ronald V. Croce ◽  
John P. Miller ◽  
Robert Confessore ◽  
James C. Vailas
Keyword(s):  
Knee Joint ◽  
Female Athletes ◽  
Vastus Lateralis ◽  
Biceps Femoris ◽  
Median Frequency ◽  
Vastus Medialis ◽  
Mean Square ◽  
Joint Movement ◽  
Surface Electrodes ◽  
Emg Patterns

The purpose of this study was to examine coactivation patterns of the lateral and medial quadriceps and the lateral and medial hamstrings during low- and moderate-speed isokinetic movements. Twelve female athletes performed isokinetic knee assessments at 60 and 180°/s. Root mean square electromyographic (rmsEMG) activity and the median frequency of the EMG (mfEMG) were determined by placing bipolar surface electrodes on the vastus lateralis (VL), vastus medialis (VM), biceps femoris (BF), and medial hamstrings (MH). Results of rmsEMG indicated that the VM showed almost twice the coactivation of the VL (p< .05), and that the BF showed almost four times the coactivation of the MH (p <.05). Finally, differences were noted in the mfEMG (p< .05), with the VM displaying different recruitment patterns at 180°/s as an agonist compared to that as an antagonist. Results indicated that when acting as antagonists, the VM and BE display the greatest EMG patterns during isokinetic knee joint movement.

scholarly journals Roller-Massager Application to the Quadriceps and Knee-Joint Range of Motion and Neuromuscular Efficiency During a Lunge

2015 ◽  
Vol 50 (2) ◽  
pp. 133-140 ◽  
Author(s):  
David J. Bradbury-Squires ◽  
Jennifer C. Noftall ◽  
Kathleen M. Sullivan ◽  
David G. Behm ◽  
Kevin E. Power ◽  
...  
Keyword(s):  
Knee Joint ◽  
Range Of Motion ◽  
Vastus Lateralis ◽  
Muscle Relaxation ◽  
Biceps Femoris ◽  
Pain Scale ◽  
Controlled Clinical Trial ◽  
Experimental Conditions ◽  
Maximal Voluntary Isometric Contraction ◽  
Muscular Performance

Context: Roller massagers are used as a recovery and rehabilitative tool to initiate muscle relaxation and improve range of motion (ROM) and muscular performance. However, research demonstrating such effects is lacking. Objective: To determine the effects of applying a roller massager for 20 and 60 seconds on knee-joint ROM and dynamic muscular performance. Design: Randomized controlled clinical trial. Setting: University laboratory. Patients or Other Participants: Ten recreationally active men (age = 26.6 ± 5.2 years, height = 175.3 ± 4.3 cm, mass = 84.4 ± 8.8 kg). Intervention(s): Participants performed 3 randomized experimental conditions separated by 24 to 48 hours. In condition 1 (5 repetitions of 20 seconds) and condition 2 (5 repetitions of 60 seconds), they applied a roller massager to the quadriceps muscles. Condition 3 served as a control condition in which participants sat quietly. Main Outcome Measure(s): Visual analog pain scale, electromyography (EMG) of the vastus lateralis (VL) and biceps femoris during roller massage and lunge, and knee-joint ROM. Results: We found no differences in pain between the 20-second and 60-second roller-massager conditions. During 60 seconds of roller massage, pain was 13.5% (5.7 ± 0.70) and 20.6% (6.2 ± 0.70) greater at 40 seconds and 60 seconds, respectively, than at 20 seconds (P &lt; .05). During roller massage, VL and biceps femoris root mean square (RMS) EMG was 8% and 7%, respectively, of RMS EMG recorded during maximal voluntary isometric contraction. Knee-joint ROM was 10% and 16% greater in the 20-second and 60-second roller-massager conditions, respectively, than the control condition (P &lt; .05). Finally, average lunge VL RMS EMG decreased as roller-massage time increased (P &lt; .05). Conclusions: Roller massage was painful and induced muscle activity, but it increased knee-joint ROM and neuromuscular efficiency during a lunge.

Pelvic Limb Kinematics and Surface Electromyography of the Vastus Lateralis, Biceps Femoris, and Gluteus Medius Muscle in Dogs with Hip Osteoarthritis

2011 ◽  
Vol 41 (1) ◽  
pp. 54-62 ◽  
Author(s):  
Barbara Bockstahler ◽  
Cordula Kräutler ◽  
Peter Holler ◽  
Alexander Kotschwar ◽  
Angela Vobornik ◽  
...  
Keyword(s):  
Surface Electromyography ◽  
Vastus Lateralis ◽  
Hip Osteoarthritis ◽  
Gluteus Medius ◽  
Biceps Femoris ◽  
Gluteus Medius Muscle ◽  
Limb Kinematics ◽  
Pelvic Limb

scholarly journals Static Loading of the Knee Joint Results in Modified Single Leg Landing Biomechanics

2019 ◽  
Author(s):  
Michael W. Olson
Keyword(s):  
Knee Joint ◽  
Static Loading ◽  
Vastus Lateralis ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Rate Of Force Development ◽  
External Loading ◽  
Force Development ◽  
Before And After ◽  
Angular Velocities

ABSTRACTBackgroundExternal loading of the ligamentous tissues induces mechanical creep, which modifies neuromuscular response to perturbations. It is not well understood how ligamentous creep affects athletic performance and contributes to modifications of knee biomechanics during functional tasks.Hypothesis/PurposeThe purpose of this study was to examine the mechanical and neuromuscular responses to single leg drop landing perturbations before and after passive loading of the knee joint.Study DesignDescriptive laboratory studyMethodsMale (n=7) and female (n=14) participants’ (21.3 ± 2.1 yrs, 1.69 ± 0.09 m, 69.3 ± 13.0 kg) right hip, knee, and ankle kinematics were assessed during drop landings performed from a 30 cm height onto a force platform before and after a 10 min creep protocol. Electromyography (EMG) signals were recorded from rectus femoris (RF), vastus lateralis (VL), vastus medialis (VM), semimembranosus (SM), and biceps femoris (BF) muscles. The creep protocol involved fixing the knee joint at 35° during static loading with perpendicular loads of either 200 N (males) or 150 N (females). Maximum, minimum, range of motion (ROM), and angular velocities were assessed for the hip, knee, and ankle joints, while normalized average EMG (NAEMG), average vertical ground reaction forces (aVGRF), and rate of force development (RFD) were assessed at landing. Rate of force development (RFD) was calculated during the landings using ANOVAs. Alpha was set at 0.05.ResultsMaximum hip flexion velocity decreased (p < 0.01). Minimum knee flexion velocity increased (p < 0.02). Minimum knee ad/abduction velocity decreased (p < 0.001). Ankle ROM decreased (p < 0.001). aVGRF decreased (p < 0.02). RFD had a non-significant trend (p = 0.076). NAEMG was significant between muscle groups (p < 0.02).ConclusionDistinct changes in velocity parameters are attributed to the altered mechanical behavior of the knee joint tissues and may contribute to changes in the loading of the leg during landing.

Sign in / Sign up

Export Citation Format

Share Document