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 < .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 < .05). Finally, average lunge VL RMS EMG decreased as roller-massage time increased (P < .05). Conclusions: Roller massage was painful and induced muscle activity, but it increased knee-joint ROM and neuromuscular efficiency during a lunge.

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 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.

scholarly journals Effectiveness of a long-term Tecar Therapy treatment on Knee Pain: building T.T.E.S.S.K., an evaluating scale A systematic review and meta-analysis

2022 ◽  
Author(s):  
Marco Sorrentino ◽  
Davide Ferrari
Keyword(s):  
Knee Joint ◽  
Rating Scale ◽  
Musculoskeletal Diseases ◽  
Meta Analysis ◽  
Invasive Procedure ◽  
Biceps Femoris ◽  
Pain Scale ◽  
The Body ◽  
Cochrane Library

Abstract Background T.E.C.a.R (Transfer of Energy Capacitive and Resistive) Therapy (TT) is a form of endogenous thermotherapy based on radio waves 1 . It is a non-invasive procedure, that makes use of a machine able to stimulate heat inside the body to repair the inflammatory processes. Although being well known in the physiotherapy and massage therapy ambient for its benefic effects, which are still not very explored especially physiological and biochemical ones; TT is commonly used by therapists for musculoskeletal diseases. Anyhow, TT is often used as a palliative remedy for musculoskeletal disease, or linked with an ibuprofen or antidolorific medical therapy, and not as a main cure. Current literature still lacks objective ways to evaluate TT treatment. This study aims to create an evaluating Scale for the knee joint lesions treated with TT, for athletes or sports enthusiasts. Methods PubMed, Embase, and Cochrane Library databases were screened to perform an extensive review. PRISMA guidelines were applied, and the risk of bias was assessed, as was the methodological quality of the included studies. 25 articles were reviewed. 178 patients (total amount of clinic cases in PubMed, Embase and Cochrane Library articles combined) have decreased their pain after a long-term TT treatment (> 3 or 5 sessions). Results Knee joint is often affected by non-sportive or sportive musculoskeletal lesions. ((At this point, not only the TT articles were reviewed, but also all the articles (122) that included these key aspects)). Six items were selected to evaluate the efficacy of TT on the impaired joint: Range of Motion (ROM), %MVIC of quadriceps, biceps femoris and gastrocnemius, Cincinnati Rating Scale System (CRSS), NRS Pain Scale, Muscle Fiber Orientation (MFO) and %Trigger Points. Conclusions Our study allows to build a new treatment methodology with TT. It guarantees the therapist to structure a long-lasting follow-up, which is not limited to the simple use of the machine. Applying this methodology, the patient receives a treatment that is not limited, but built on his own needs thanks to the distribution of the summing scores, strictly dependent on the type of clinical case that the therapist finds. Thanks to the six items we inserted in T.T.E.S.S.K. (“Tecar Therapy Evaluation Score System of the Knee”), every aspect of a musculotendinous pathology is recognized, and might be treated with TT by therapists.

The Effect of Foam Rolling Versus IASTM on Knee Range of Motion, Fascial Displacement, and Patient Satisfaction

2020 ◽  
pp. 1-8
Author(s):  
Michelle A. Sandrey ◽  
Cody Lancellotti ◽  
Cory Hester
Keyword(s):  
Patient Satisfaction ◽  
Soft Tissue ◽  
Range Of Motion ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Knee Extension ◽  
Iliotibial Band ◽  
Controlled Clinical Trial ◽  
Foam Rolling ◽  
Myofascial Release

Context: Soft tissue restrictions have been linked to poor flexibility and decreased range of motion (ROM). To decrease the soft tissue restrictions and ultimately increase ROM/flexibility, myofascial release techniques, such as foam rolling (FR) and instrument-assisted soft tissue mobilization (IASTM), have been used. However, the benefit regarding which technique is more beneficial remains unknown. Objective: To examine the effects of myofascial release techniques (FR vs the instrumented portion of IASTM) on knee joint ROM, rectus femoris (RF) and biceps femoris (BF) fascial displacement, and patient satisfaction. Design: Randomized controlled clinical trial. Setting: Mid-Atlantic University. Participants: Twenty moderately active participants (age 21.1 [2.0] y) with variable levels of soft tissue restriction in the quadriceps and hamstrings started and completed the study. Participants were randomly assigned to 2 groups, FR or IASTM. Interventions: All participants completed the same warm-up prior to the intervention. The FR group followed the proper FR protocol for gluteals/iliotibial band, quadriceps, and hamstrings/adductors, and the participants were monitored while the protocol was completed. The IASTM group received treatment on the gluteals/iliotibial band followed by the quadriceps, adductors, and hamstrings. Participants in both groups attended intervention sessions twice per week for 3 weeks. Prior to the start, knee ROM measurements were taken, along with fascial displacement measured via ultrasound. Upon completion of the study, posttest measurements were completed. A patient satisfaction survey was also administered at this time. Main Outcome Measures: Pretest to posttest knee ROM measurements, RF and BF fascial displacement, and patient satisfaction. Results: Both groups improved pretest to posttest for knee-extension ROM, with a slight trend toward increased knee-extension ROM for the FR group. Both groups improved pretest to posttest for BF and RF fascial displacement, in favor of the IASTM group for BF fascial displacement. Both groups were equally satisfied. Conclusions: As both groups improved pretest to posttest, either treatment could be used.

Electromyography Activation of the Lower-Limb Muscles Adopting a Physioball and Elastic Band to Stabilize the Knee Joint During Multiple Sets With Submaximal Loads

2017 ◽  
Vol 26 (5) ◽  
pp. 406-414 ◽  
Author(s):  
Gabriel Andrade Paz ◽  
Jason DeFreitas ◽  
Marianna de Freitas Maia ◽  
Jurandir Silva ◽  
Vicente Lima ◽  
...  
Keyword(s):  
Knee Joint ◽  
Study Design ◽  
Vastus Lateralis ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Crossover Design ◽  
Elastic Band ◽  
Lower Extremity Injuries ◽  
Control Protocol ◽  
Lower Limb Muscles

Study Design:Crossover design.Context:Excessive valgus and varus force which affected the knee joint during dynamic tasks has been often associated to lower extremity injuries. Strategies to increase the resistance against these asymmetries (eg, the use of a physioball between the knees or elastic bands around the knees) are often applied in rehabilitation and conditioning programs.Objective:The purpose of this study was to investigate the effect of performing leg press (LP) 45° using a physioball and elastic band over multiple sets with submaximal loads on electromyographic (EMG) amplitude and fatigue indices.Methods:18 trained females volunteered (age: 24.4 ± 2.1 y; height: 168.1 ± 4 cm; body mass: 65.1 ± 4.4 kg) participated in this study. The 10 repetition maximum (RM) loads were determined for the LP. Then, 3 experimental protocols were followed in a randomized crossover design over 3 nonconsecutive days: control protocol—the participants performed 4 LP sets; physioball between knees—4 LP sets were performed with the physioball between the knees; elastic band—4 LP sets were performed with the elastic band involving the knees. Ten repetitions were performed during each set with 70% of 10-RM loads; EMG spectral indices (CRMS and Cf5) was collected from the biceps femoris (BF), vastus lateralis (VL), vastus medialis obliquus (VMO), and rectus femoris (RF) muscles.Results:Higher levels of CRMS and Cf5 were noted for RF, VL, and VM muscles using the physioball and elastic band when compared with control protocol, respectively. CRMS index of BF muscle was significantly higher using physioball and elastic band protocol versus control condition, respectively.Conclusion:Therefore, both physioball and elastic band can be adopted during LP with the goal to reduce excessive varus and valgus forces, respectively, even performing consecutive sets with submaximal loads. Furthermore, this may be an interesting alternative to increasing quadriceps activation and improving the knee joint stabilization.

A Comparison of Gluteus Maximus, Biceps Femoris, and Vastus Lateralis Electromyography Amplitude in the Parallel, Full, and Front Squat Variations in Resistance-Trained Females

2016 ◽  
Vol 32 (1) ◽  
pp. 16-22 ◽  
Author(s):  
Bret Contreras ◽  
Andrew D. Vigotsky ◽  
Brad J. Schoenfeld ◽  
Chris Beardsley ◽  
John Cronin
Keyword(s):  
Range Of Motion ◽  
Body Mass ◽  
Training Stimulus ◽  
Vastus Lateralis ◽  
Full Range ◽  
Gluteus Maximus ◽  
Biceps Femoris ◽  
Repetition Maximum ◽  
Training Adaptations ◽  
Back Squat

Front, full, and parallel squats are some of the most popular squat variations. The purpose of this investigation was to compare mean and peak electromyography (EMG) amplitude of the upper gluteus maximus, lower gluteus maximus, biceps femoris, and vastus lateralis of front, full, and parallel squats. Thirteen healthy women (age = 28.9 ± 5.1 y; height = 164 ± 6.3 cm; body mass = 58.2 ± 6.4 kg) performed 10 repetitions of their estimated 10-repetition maximum of each respective variation. There were no statistical (P = .05) differences between full, front, and parallel squats in any of the tested muscles. Given these findings, it can be concluded that the front, full, or parallel squat can be performed for similar EMG amplitudes. However, given the results of previous research, it is recommended that individuals use a full range of motion when squatting, assuming full range can be safely achieved, to promote more favorable training adaptations. Furthermore, despite requiring lighter loads, the front squat may provide a similar training stimulus to the back squat.

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 Muscle Activation Differs between Three Different Knee Joint-Angle Positions during a Maximal Isometric Back Squat Exercise

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Paulo Henrique Marchetti ◽  
Josinaldo Jarbas da Silva ◽  
Brad Jon Schoenfeld ◽  
Priscyla Silva Monteiro Nardi ◽  
Silvio Luis Pecoraro ◽  
...  
Keyword(s):  
Knee Joint ◽  
Muscle Activation ◽  
Specific Activity ◽  
Vastus Lateralis ◽  
Gluteus Maximus ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Joint Angles ◽  
Back Squat ◽  
Squat Exercise

The purpose of this study was to compare muscle activation of the lower limb muscles when performing a maximal isometric back squat exercise over three different positions. Fifteen young, healthy, resistance-trained men performed an isometric back squat at three knee joint angles (20°, 90°, and 140°) in a randomized, counterbalanced fashion. Surface electromyography was used to measure muscle activation of the vastus lateralis (VL), vastus medialis (VM), rectus femoris (RF), biceps femoris (BF), semitendinosus (ST), and gluteus maximus (GM). In general, muscle activity was the highest at 90° for the three quadriceps muscles, yet differences in muscle activation between knee angles were muscle specific. Activity of the GM was significantly greater at 20° and 90° compared to 140°. The BF and ST displayed similar activation at all joint angles. In conclusion, knee position alters muscles activation of the quadriceps and gluteus maximus muscles. An isometric back squat at 90° generates the highest overall muscle activation, yet an isometric back squat at 140° generates the lowest overall muscle activation of the VL and GM only.

scholarly journals Comparison of Muscle Activity During 200 m Indoor Curve and Straight Sprinting in Elite Female Sprinters

2021 ◽  
Vol 80 (1) ◽  
pp. 309-316
Author(s):  
Przemysław Pietraszewski ◽  
Artur Gołaś ◽  
Michał Krzysztofik
Keyword(s):  
Vastus Lateralis ◽  
Gluteus Maximus ◽  
Biceps Femoris ◽  
Lower Limbs ◽  
Experimental Conditions ◽  
Gastrocnemius Medialis ◽  
Lower Limb Muscles ◽  
Subject Design ◽  
Leg Muscle ◽  
The Right

Abstract The purpose of this study was to assess whether peak surface electromyography (sEMG) amplitude of selected lower limb muscles differed during a) curve and straight sprinting, b) sprinting in inside and outside lanes between lower limbs. Eleven well-trained female sprinters (personal best: 24.1 ± 1.1 s) were included in a randomized within-subject design study, in which participants underwent two experimental conditions: all-out 200 m indoor sprints in the innermost and outermost lane. Peak sEMG amplitude was recorded bilaterally from gastrocnemius medialis, biceps femoris, gluteus maximus, tibialis anterior, and vastus lateralis muscles. Left gastrocnemius medialis peak sEMG amplitude was significantly higher than for the right leg muscle during curve (p = 0.011) and straight sprinting (p < 0.001) when sprinting in the inside lane, and also significantly higher when sprinting in the inside vs. outside lane for both curve and straight sprinting (p = 0.037 and p = 0.027, respectively). Moreover, left biceps femoris peak sEMG amplitude was significantly higher during straight sprinting in the inside vs. outside lane (p = 0.006). Furthermore, right and left vastus lateralis peak sEMG amplitude was significantly higher during curve sprinting in the inside lane (p = 0.001 and p = 0.004, respectively) and for the left leg muscle peak sEMG amplitude was significantly higher during curve compared to straight sprinting in the outside lane (p = 0.024). Results indicate that curve sprinting creates greater demands mainly for the gastrocnemius medialis of the inner than the outer leg, but the degree of these requirements seems to depend on the radius of the curve, thus significant changes were noted during sprinting in the inside lane, but not in the outside lane.

Effect of Vibration on Forward Split Flexibility and Pain Perception in Young Male Gymnasts

2008 ◽  
Vol 3 (4) ◽  
pp. 469-481 ◽  
Author(s):  
William A. Sands ◽  
Jeni R. McNeal ◽  
Michael H. Stone ◽  
G. Gregory Haff ◽  
Ann M. Kinser
Keyword(s):  
Range Of Motion ◽  
Pain Threshold ◽  
Pain Perception ◽  
Vastus Lateralis ◽  
Young Male ◽  
Biceps Femoris ◽  
Vastus Lateralis Muscle ◽  
Biceps Femoris Muscle ◽  
The Difference ◽  
Continue Investigation

Serious stretching in many sports involves discomfort and is often an early ceiling on improvements.Purpose:To continue investigation of the use of vibration to enhance acute range of motion while assessing the influence of vibration and stretching on pressure-to-pain threshold perception.Methods:Ten young male gymnasts were assessed for split range of motion. One side split was randomly assigned as the experimental condition, and the other side split was assigned as the control. Both side splits were performed on a vibration device; the experimental condition had the device turned on and the control condition was performed with the device turned off. In addition, the athletes were assessed for pressure-to-pain transition using an algometer on the biceps femoris (stretched muscle) and vastus lateralis (nonstretched muscle) bilaterally.Results:Pre-post difference scores between the vibrated split (most improved) and the nonvibrated split were statistically different (P = .001, 95% confidence interval of the difference 2.3 to 5.8 cm). Following the stretching protocol, the force values for the pressure-to-pain threshold comparing the vibrated and nonvibrated biceps femoris muscle were not statistically different. The nonstretched vastus lateralis muscle also showed no statistical difference in pressure-to-pain threshold between the vibration and nonvibration conditions.Conclusion:This study showed that vibration improved split range of motion over stretching alone, but did not show a difference in pressure-to-pain perception in either the stretched or nonstretched muscles.

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