Patellar Tendinopathy Alters the Distribution of Lower Extremity Net Joint Moments during Hopping

Souza, Richard B.; Arya, Shruti; Pollard, Christine D.; Salem, George J.; Kulig, Kornelia

doi:10.1123/jab.26.3.249

Cited by 30 publications

(26 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such was the case for patients with tendinopathy who were required to hop on the involved lower extremity. 40 Although some joint kinematics were altered, our participants generally exhibited kinematic invariance 42 (ie, relatively little change in kinematic variables) among the 3 experimental conditions (control, pain, and sham). In speculation, this may be related to the kinematic invariance that has been documented for able-bodied 43 and amputee participants.…”

Section: Discussionmentioning

confidence: 99%

A Novel Experimental Knee-Pain Model Affects Perceived Pain and Movement Biomechanics

Seeley

Park

King

et al. 2013

Journal of Athletic Training

View full text Add to dashboard Cite

Context: Knee injuries are prevalent, and the associated knee pain is linked to disability. The influence of knee pain on movement biomechanics, independent of other factors related to knee injuries, is difficult to study and unclear.Objective: (1) To evaluate a novel experimental knee-pain model and (2) better understand the independent effects of knee pain on walking and running biomechanics.Design: Crossover study. Setting: Biomechanics laboratory.Patients or Other Participants: Twelve able-bodied volunteers (age ¼ 23 6 3 years, height ¼ 1.73 6 0.09 m, mass ¼ 75 6 14 kg).Intervention(s): Participants walked and ran at 3 time intervals (preinfusion, infusion, and postinfusion) for 3 experimental conditions (control, sham, and pain). During the infusion time interval for the pain and sham conditions, hypertonic or isotonic saline, respectively, was continuously infused into the right infrapatellar fat pad for 22 minutes.Main Outcome Measure(s): We used repeated-measures analyses of variance to evaluate the effects of time and condition on (1) perceived knee pain and (2) key biomechanical characteristics (ground reaction forces, and joint kinematics and kinetics) of walking and running (P , .05).Results: The hypertonic saline infusion (1) increased perceived knee pain throughout the infusion and (2) reduced discrete characteristics of each component of the walking ground reaction force, walking peak plantar-flexion angle (range ¼ 628-678), walking peak plantar-flexion moment (range ¼ 95-104 NÁm), walking peak knee-extension moment (range ¼ 36-49 NÁm), walking peak hip-abduction moment (range ¼ 62-73 NÁm), walking peak support moment (range ¼ 178-207 NÁm), running peak plantar-flexion angle (range ¼ 388-778), and running peak hip-adduction angle (range ¼ 5-218).Conclusions: This novel experimental knee pain model consistently increased perceived pain during various human movements and produced altered running and walking biomechanics that may cause abnormal knee joint-loading patterns.

show abstract

Section: Discussionmentioning

confidence: 99%

A Novel Experimental Knee-Pain Model Affects Perceived Pain and Movement Biomechanics

Seeley

Park

King

et al. 2013

Journal of Athletic Training

View full text Add to dashboard Cite

show abstract

“…In early OA, the tissue increases in water content and the collagen becomes disorganized, both of which result in an elevated T 2 relaxation time. Acute loading of cartilage has a direct influence on both T 1ρ and T 2 relaxation times in healthy and OA subjects (Souza et al, 2010a), and experimental varus loading has been shown to significantly reduce medial compartment T 2 times in porcine knees. (Shiomi et al, 2010) However, very few studies have investigated the influence of loading behaviors on these imaging parameters, and no studies to date have evaluated the relationship of knee kinetics during dynamic tasks with advanced quantitative MRI relaxation time mapping of cartilage.…”

Section: Introductionmentioning

confidence: 99%

Relationship between knee kinetics during jumping tasks and knee articular cartilage MRI T1rho and T2 relaxation times

Souza¹,

Fang²,

Luke³

et al. 2012

Clinical Biomechanics

Self Cite

View full text Add to dashboard Cite

Background Articular cartilage of young healthy individuals is dynamic and responsive to loading behaviors. The purpose of this study was to evaluate the relationship of cartilage T1ρ and T2 relaxation times with loading kinetics during jumping tasks in healthy young individuals. Methods Fourteen healthy subjects underwent: 1) motion analysis while performing a unilateral hopping task and bilateral drop jumping task; and 2) quantitative imaging using a 3 Tesla MRI for T1ρ and T2 relaxation time analysis. Three dimensional net joint moments and angular impulse was calculated using standard inverse dynamics equations. Average T1ρ and T2 relaxation times and medial-lateral ratios for each were calculated. Multiple regression was used to identify predictors of cartilage relaxation times. Findings Average knee flexion moment during hopping was observed to best predict overall T1ρ (R2=.185) and T2 (R2=.154) values. Peak knee adduction moment during a drop jump was the best predictor of the T1ρ medial-lateral ratio (R2=.220). The T2 medial-lateral ratio was best predicted by average internal rotation moment during the drop jump (R2=.174). Interpretation These data suggest that loads across the knee may affect the biochemistry of the cartilage. In young healthy individuals, higher flexion moments were associated with decreased T1ρ and T2 values, suggesting a potentially beneficial effect. The medial-to-lateral ratio of T1ρ and T2 times appears to be related to the frontal and transverse plane joint mechanics. These data offer promising findings of potentially modifiable parameters associated with cartilage composition.

show abstract

“…In some movements, including the volleyball approach jump takeoff, howevtions to the sagittal plane net joint support moment. 25 Despite what might seem an effective short-term adaptation, these compensatory patterns may in time lead to unforeseen and potentially deleterious effects to health or performance. Hopping is, however, a comparatively constrained movement pattern.…”

Section: Knee Joint Kinetics and Kinematicsmentioning

confidence: 99%

Knee Extensor Dynamics in the Volleyball Approach Jump: The Influence of Patellar Tendinopathy

Sorenson¹,

Arya²,

Souza³

et al. 2010

Journal of Orthopaedic & Sports Physical Therapy

Self Cite

View full text Add to dashboard Cite

Study Design Controlled laboratory study using a cross-sectional design. Objectives To evaluate knee joint dynamics in elite volleyball players with and without a history of patellar tendinopathy, focusing on mechanical energy absorption and generation. We hypothesized that tendinopathy would be associated with reduced net joint work and net joint power. Background Patellar tendinopathy is a common, debilitating injury affecting competitive volleyball players. Methods Thirteen elite male players with and without a history of patellar tendinopathy (mean ± SD age, 27 ± 7 years) performed maximum-effort volleyball approach jumps. Sagittal plane knee joint kinematics, kinetics, and energetics were quantified in the lead limb, using data obtained from a force platform and an 8-camera motion analysis system. Vertical ground reaction forces and pelvis vertical velocity at takeoff were examined. Independent sample t tests were used to evaluate group differences (α = .05). Results The tendinopathy group, compared to controls, demonstrated significant reductions (approximately 30%) in net joint work and net joint power during the eccentric phase of the jump, with no differences in the concentric phase. Positive-to-negative net joint work and net joint power ratios were significantly higher in the tendinopathy group, which had a net joint work ratio of 1.00 (95% CI: 0.77, 1.24) versus 0.76 (95% CI: 0.64, 0.88) for controls, and a net joint power ratio of 1.62 (95% CI: 1.15, 2.10) versus 1.00 (95% CI: 0.80, 1.21) for controls. There were no significant differences in net joint moment, angular velocity, or range of motion. Peak vertical ground reaction forces were lower for the tendinopathy group, while average vertical ground reaction forces and pelvis vertical velocity were similar. Conclusions Patellar tendinopathy is associated with differences in sagittal plane mechanical energy absorption at the knee during maximum-effort volleyball approach jumps. Net joint work and net joint power may help define underlying mechanisms, adaptive effects, or rehabilitative strategies for individuals with patellar tendinopathy. J Orthop Sports Phys Ther 2010;40(9):568–576. doi:10.2519/jospt.2010.3313

show abstract

Patellar Tendinopathy Alters the Distribution of Lower Extremity Net Joint Moments during Hopping

Cited by 30 publications

References 20 publications

A Novel Experimental Knee-Pain Model Affects Perceived Pain and Movement Biomechanics

A Novel Experimental Knee-Pain Model Affects Perceived Pain and Movement Biomechanics

Relationship between knee kinetics during jumping tasks and knee articular cartilage MRI T1rho and T2 relaxation times

Knee Extensor Dynamics in the Volleyball Approach Jump: The Influence of Patellar Tendinopathy

Contact Info

Product

Resources

About