scholarly journals Combining advanced computational and imaging techniques as a quantitative tool to estimate patellofemoral joint stress during downhill gait: A feasibility study

2021 ◽  
Vol 84 ◽  
pp. 31-37
Author(s):  
Jonathan A. Gustafson ◽  
John J. Elias ◽  
G. Kelley Fitzgerald ◽  
Scott Tashman ◽  
Richard E. Debski ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Patellofemoral Joint ◽  
Imaging Techniques ◽  
Joint Stress ◽  
Quantitative Tool

Elevated Knee Joint Kinetics and Reduced Ankle Kinetics Are Present During Jogging and Hopping After Achilles Tendon Ruptures

2017 ◽  
Vol 45 (5) ◽  
pp. 1124-1133 ◽  
Author(s):  
Richard W. Willy ◽  
Annelie Brorsson ◽  
Hayley C. Powell ◽  
John D. Willson ◽  
Roy Tranberg ◽  
...  
Keyword(s):  
Knee Joint ◽  
Lower Extremity ◽  
Achilles Tendon ◽  
Patellofemoral Joint ◽  
Tendon Rupture ◽  
Achilles Tendon Rupture ◽  
Joint Power ◽  
Joint Stress ◽  
Joint Kinetics ◽  
Joint Loads

Background: Deficits in plantarflexor function are common after an Achilles tendon rupture. These deficits may result in an altered distribution of joint loads during lower extremity tasks. Hypothesis: We hypothesized that, regardless of treatment, the Achilles tendon–ruptured limb would exhibit deficits in ankle kinematics and joint power while exhibiting elevated knee joint power and patellofemoral joint loads during walking, jogging, and hopping. We further hypothesized that this loading pattern would be most evident during jogging and hopping. Study Design: Controlled laboratory study. Methods: Thirty-four participants (17 participants treated surgically, 17 treated nonsurgically) were tested at a mean 6.1 ± 2.0 years after an Achilles tendon rupture. Lower extremity kinematics and kinetics were assessed while participants completed walking, jogging, and single-legged hopping trials. Patellofemoral joint stress was calculated via a musculoskeletal model. Data were analyzed via mixed-model repeated analyses of variance (α = .05) and the limb symmetry index (LSI). Results: No differences ( P ≥ .05) were found between the surgical and nonsurgical groups. In both groups, large side-to-side deficits in the plantarflexion angle at toeoff (LSI: 53.5%-73.9%) were noted during walking, jogging, and hopping in the involved limb. Side-to-side deficits in the angular velocity were only present during jogging (LSI: 93.5%) and hopping (LSI: 92.5%). This pattern was accompanied by large deficits in eccentric (LSI: 80.8%-94.7%) and concentric (LSI: 82.2%-84.7%) ankle joint powers in the involved limb during all tasks. Interestingly, only jogging and hopping demonstrated greater knee joint loads when compared with the uninvolved limb. Concentric knee power was greater during jogging (LSI: 117.2%) and hopping (LSI: 115.9%) compared with the uninvolved limb. Similarly, peak patellofemoral joint stress was greater in the involved limb during jogging (LSI: 107.5%) and hopping (LSI: 107.1%), while only hopping had a greater loading rate of patellofemoral joint stress (LSI: 110.9%). Conclusion: Considerable side-to-side deficits in plantarflexor function were observed during walking, jogging, and hopping in patients after an Achilles tendon rupture. As a possible compensation, increased knee joint loads were present but only during jogging and hopping. Clinical Relevance: These data suggest that after an Achilles tendon rupture, patients may be susceptible to greater mechanical loading of the knee during sporting tasks, regardless of surgical or nonsurgical treatment.

Effects of step length on patellofemoral joint stress in female runners with and without patellofemoral pain

2014 ◽  
Vol 29 (3) ◽  
pp. 243-247 ◽  
Author(s):  
John D. Willson ◽  
Ryan Sharpee ◽  
Stacey A. Meardon ◽  
Thomas W. Kernozek
Keyword(s):  
Patellofemoral Joint ◽  
Step Length ◽  
Patellofemoral Pain ◽  
Joint Stress

scholarly journals Patellofemoral Joint Loads during Running Immediately Changed by Shoes with Different Minimalist Indices: A Cross-sectional Study

2019 ◽  
Vol 9 (19) ◽  
pp. 4176 ◽  
Author(s):  
Chenhao Yang ◽  
Songlin Xiao ◽  
Yang Yang ◽  
Xini Zhang ◽  
Junqing Wang ◽  
...  
Keyword(s):  
Contact Force ◽  
Contact Area ◽  
Patellofemoral Joint ◽  
Reaction Force ◽  
Knee Extension ◽  
Quadriceps Strength ◽  
Cross Sectional ◽  
Joint Stress ◽  
Peak Knee ◽  
The Impact

Purpose: Given the high incidence of patellofemoral pain syndrome (PFPS) in runners, this study aimed to investigate the immediate effect of shoes with different minimalist indices (MI) on the mechanical loads of the patellofemoral joint. Methods: Fifteen healthy male rearfoot strike runners were recruited to complete overground running trials at 3.33 m/s (±5%) in two running shoe conditions (MI = 26% versus MI = 86%). The amount of ten Vicon infrared cameras (100 Hz) and two Kistler force plates (1000 Hz) were used to collect kinematic and ground reaction force (GRF) data simultaneously. Quadriceps strength, patellofemoral contact force, patellofemoral contact area, and patellofemoral contact stress were calculated. Results: No significant differences were observed in the impact force and the second peak of the vertical GRF between the two shoe conditions. Compared to wearing low-MI shoes, wearing high-MI shoes showed that the maximum flexion angle of the knee, the contact area of patellofemoral joint and the peak knee extension moment reduced significantly (p < 0.01), and the peak patellofemoral contact force and stress decreased significantly (p < 0.05). Conclusion: These findings suggest that wearing high-MI shoes significantly decreases the patellofemoral contact force and patellofemoral joint stress by reducing the moment of knee extension, thus effectively reducing the load of the patellofemoral joint during the stance phase of running and potentially lowering the risk of PFPS.

Methods to assess patellofemoral joint stress: A systematic review

2018 ◽  
Vol 61 ◽  
pp. 188-196 ◽  
Author(s):  
Guilherme S. Nunes ◽  
Rodrigo Scattone Silva ◽  
Ana Flávia dos Santos ◽  
Ricardo A.S. Fernandes ◽  
Fábio Viadanna Serrão ◽  
...  
Keyword(s):  
Systematic Review ◽  
Patellofemoral Joint ◽  
Joint Stress

Comparison of two methods of determining patellofemoral joint stress during dynamic activities

2015 ◽  
Vol 42 (2) ◽  
pp. 218-222 ◽  
Author(s):  
Thomas W. Kernozek ◽  
C. Nathan Vannatta ◽  
Antonie J. van den Bogert
Keyword(s):  
Patellofemoral Joint ◽  
Joint Stress

Patellofemoral joint stress measured across three different running techniques

2019 ◽  
Vol 68 ◽  
pp. 37-43 ◽  
Author(s):  
Ana Flavia dos Santos ◽  
Theresa Helissa Nakagawa ◽  
Fábio Viadanna Serrão ◽  
Reed Ferber
Keyword(s):  
Patellofemoral Joint ◽  
Joint Stress
Sign in / Sign up

Export Citation Format

Share Document