Effects of Experimental Anterior Knee Pain on Muscle Activation During Landing and Jumping Performed at Various Intensities

Park, Jihong; Denning, W. Matt; Pitt, Jordan D; Francom, Devin; Hopkins, J. Ty; Seeley, Matthew K.

doi:10.1123/jsr.2015-0119

Cited by 20 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similarly, we found no correlation between knee isokinetic muscle strength and knee subscore of the HJHS. This result could be astonishing as the scope of application of this clinical subscore explores strength (Using the Daniels & Worthingham's scale) and muscle atrophy, but also knee pain, range of motion and swelling that may have an impact on quadriceps and hamstring strength 31,41 . However, a statistical trend was shown between knee subscore of the HJHS and quadriceps strength ( P = 0.07).…”

Section: Discussionmentioning

confidence: 88%

Isokinetic knee strength deficit in patients with moderate haemophilia

Maugars

Trossaërt²,

Rannou

et al. 2021

Haemophilia

View full text Add to dashboard Cite

Introduction: Knee joint bleedings are responsible for quadriceps atrophy and strength deficit in patients with severe haemophilia. Little is known about patients with moderate haemophilia (PWMH). Aim:To evaluate isokinetic quadriceps and hamstrings strength in PWMH and to assess correlation with radiological and clinical parameter.Methods: 18 PWMH aged 37.1 ± 11.4 and 18 healthy age-, weight-and heightmatched controls performed a knee isokinetic test at 180°/s to assess quadriceps and hamstrings strength. In the PWMH group, knee Pettersson's score was pursued and Haemophilia Joint Health Score 2.1 (HJHS) was performed to determine unaffected knees (knee HJHS = 0) and affected ones (knee HJHS >0).Results: Affected knees had a decrease of quadriceps strength compared to controls, 1.26 ± 0.47 vs 1.64 ± 0.27 Nm/kg and a decrease of hamstring strength, 0.60 ± 0.29 vs 1.03 ± 0.21 Nm/kg, (P < 0.001). Unaffected knees also had a decrease of quadriceps strength compared to controls, 1.36 ± 0.31 vs 1.64 ± 0.27 Nm/kg and a decrease of hamstring strength, 0.69 ± 0.18 vs 1.03 ± 0.21 Nm/kg, (P < 0.001). The conventional hamstring-to-quadriceps ratio was significantly decreased in affected knees compared to controls, 0.46 ± 0.15 vs 0.64 ± 0.13 (P < 0.001) but also in unaffected knees, 0.53 ± 0.16 vs 0.64 ± 0.13 (P = 0.02).No correlation was found between strength and HJHS or Pettersson's score. Conclusion:PWMH have a significant knee strength deficit, both on the quadriceps and the hamstrings, which is responsible for an important muscle imbalance.

show abstract

Section: Discussionmentioning

confidence: 88%

Isokinetic knee strength deficit in patients with moderate haemophilia

Maugars

Trossaërt²,

Rannou

et al. 2021

Haemophilia

View full text Add to dashboard Cite

show abstract

“…Patients with Parkinson's disease present with tremor, stiffness and lack of coordination in agonist and antagonist muscles . These factors may result in recruitment of a greater number of muscle fibres to perform a movement, which leads to alterations in muscular activity …”

Section: Discussionmentioning

confidence: 99%

“…26 These factors may result in recruitment of a greater number of muscle fibres to perform a movement, which leads to alterations in muscular activity. 27 Among the body functions, most affected by Parkinson's disease is the amplitude of the motion of body joints. 28 Under the conditions of lateral excursion to right and left, Parkinson's group showed significantly higher electromyographic data in all the muscles than the control group.…”

Section: Muscles (Mean Both Sides)mentioning

confidence: 99%

Effects of Parkinson's disease on molar bite force, electromyographic activity and muscle thickness of the masseter, temporal and sternocleidomastoid muscles: A case‐control study

Verri

Silva

Fioco

et al. 2019

J of Oral Rehabilitation

View full text Add to dashboard Cite

Background Parkinson's disease is a neurological disorder that promotes motor changes in the body. Objective The aim of this study was to investigate the impairment of the stomatognathic function regarding molar bite force, electromyographic activity and thickness of the craniocervical muscles in patients with Parkinson's disease in comparison with those in asymptomatic controls. Methods Twenty‐four subjects were divided into two groups, a Parkinson's disease group (n = 12) and a control group (n = 12). The subjects were evaluated on the basis of molar bite force, electromyographic activity (rest, right and left laterality, protrusion, maximum voluntary contraction) and thickness (rest and maximum voluntary contraction) of the right and left temporal (anterior portion), masseter and sternocleidomastoid muscles. The results were submitted to a multivariate analysis of variance (MANOVA) to compare the means of the two independent groups, considering diagnosis of Parkinson's disease and craniocervical muscles as independent variables. For the post hoc comparisons, Bonferroni correction was used (P < 0.05). Results Parkinson's disease group presented lower mean values both sides for maximal molar bite force, significant increases in the electromyographic activities during mandibular tasks, lower mean thickness values of the masseter and sternocleidomastoid muscles, and higher mean thickness values of the temporalis muscles (anterior portion). Conclusion The results suggest that patients with Parkinson's disease may present functional changes of the stomatognathic system, related to bite force, electromyographic activity and thickness of the craniocervical muscles. The greater temporal muscle thickness in Parkinson's disease patients may compromise their daily life activities, especially with respect to chewing and nutrition.

show abstract

“…A previously described functional approach was used to compare the biomechanical variables of interest between the QD and QF groups throughout ground contact. 34 This approach resulted in a mean difference function for each biomechanical variable; that is, a function, over time, representing the mean between-group difference for each biomechanical variable at each percentile of ground contact with a corresponding confidence interval at each percentile of ground contact. 22,35 Whenever a confidence interval did not overlap 0, significant between-group differences were presumed to exist at that point in time (percentile).…”

Section: Discussionmentioning

confidence: 99%

Biomechanics Differ for Individuals With Similar Self-Reported Characteristics of Patellofemoral Pain During a High-Demand Multiplanar Movement Task

Seeley¹,

Son²,

Kim³

et al. 2021

Journal of Sport Rehabilitation

Self Cite

View full text Add to dashboard Cite

Context: Patellofemoral pain (PFP) is often categorized by researchers and clinicians using subjective self-reported PFP characteristics; however, this practice might mask important differences in movement biomechanics between PFP patients. Objective: To determine whether biomechanical differences exist during a high-demand multiplanar movement task for PFP patients with similar self-reported PFP characteristics but different quadriceps activation levels. Design: Cross-sectional design. Setting: Biomechanics laboratory. Participants: A total of 15 quadriceps deficient and 15 quadriceps functional (QF) PFP patients with similar self-reported PFP characteristics. Intervention: In total, 5 trials of a high-demand multiplanar land, cut, and jump movement task were performed. Main Outcome Measures: Biomechanics were compared at each percentile of the ground contact phase of the movement task (α = .05) between the quadriceps deficient and QF groups. Biomechanical variables included (1) whole-body center of mass, trunk, hip, knee, and ankle kinematics; (2) hip, knee, and ankle kinetics; and (3) ground reaction forces. Results: The QF patients exhibited increased ground reaction force, joint torque, and movement, relative to the quadriceps deficient patients. The QF patients exhibited: (1) up to 90, 60, and 35 N more vertical, posterior, and medial ground reaction force at various times of the ground contact phase; (2) up to 4° more knee flexion during ground contact and up to 4° more plantarflexion and hip extension during the latter parts of ground contact; and (3) up to 26, 21, and 48 N·m more plantarflexion, knee extension, and hip extension torque, respectively, at various times of ground contact. Conclusions: PFP patients with similar self-reported PFP characteristics exhibit different movement biomechanics, and these differences depend upon quadriceps activation levels. These differences are important because movement biomechanics affect injury risk and athletic performance. In addition, these biomechanical differences indicate that different therapeutic interventions may be needed for PFP patients with similar self-reported PFP characteristics.

show abstract

Effects of Experimental Anterior Knee Pain on Muscle Activation During Landing and Jumping Performed at Various Intensities

Cited by 20 publications

References 0 publications

Isokinetic knee strength deficit in patients with moderate haemophilia

Isokinetic knee strength deficit in patients with moderate haemophilia

Effects of Parkinson's disease on molar bite force, electromyographic activity and muscle thickness of the masseter, temporal and sternocleidomastoid muscles: A case‐control study

Biomechanics Differ for Individuals With Similar Self-Reported Characteristics of Patellofemoral Pain During a High-Demand Multiplanar Movement Task

Contact Info

Product

Resources

About