A New Lower Leg Prosthesis with Simulation Device for the Achilles Tendon

2008 ◽  
pp. 160-160-7 ◽  
Author(s):  
W Menke ◽  
F Bodem ◽  
J Casel ◽  
R Volkert
Keyword(s):  
Achilles Tendon ◽  
Lower Leg ◽  
Leg Prosthesis

Prediction of Ground Profile for Lower-Leg Prosthesis Control Using a Visual-Inertial System

2018 ◽  
Author(s):  
G. A. Ribeiro ◽  
M. Rastgaar
Keyword(s):  
Lower Leg ◽  
Inertial System ◽  
Computational Power ◽  
Human Ankle ◽  
Prosthesis Control ◽  
Ground Profile ◽  
Robotic Prosthesis ◽  
Leg Prosthesis

The field of control of powered lower-leg prostheses has advanced due to the improvements in sensors and computational power. Much effort has been done to improve the capabilities of prostheses, such as mimicking the stiffness, weight, and mobility of a human ankle-foot [1] and autonomously commanding the robotic prosthesis for gait [2].

scholarly journals Lower leg muscle–tendon unit characteristics are related to marathon running performance

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Bálint Kovács ◽  
István Kóbor ◽  
Zsolt Gyimes ◽  
Örs Sebestyén ◽  
József Tihanyi
Keyword(s):  
Achilles Tendon ◽  
Lower Leg ◽  
Cross Sectional Area ◽  
Marathon Running ◽  
Sectional Area ◽  
Flexor Muscle ◽  
Cross Sectional ◽  
Running Performance ◽  
Leg Muscle ◽  
Marathon Performance

Abstract The human ankle joint and plantar flexor muscle–tendon unit play an important role in endurance running. It has been assumed that muscle and tendon interactions and their biomechanical behaviours depend on their morphological and architectural characteristics. We aimed to study how plantar flexor muscle characteristics influence marathon running performance and to determine whether there is any difference in the role of the soleus and gastrocnemii. The right lower leg of ten male distance runners was scanned with magnetic resonance imagining. The cross-sectional areas of the Achilles tendon, soleus, and lateral and medial gastrocnemius were measured, and the muscle volumes were calculated. Additional ultrasound scanning was used to estimate the fascicle length of each muscle to calculate the physiological cross-sectional area. Correlations were found between marathon running performance and soleus volume (r = 0.55, p = 0.048), soleus cross-sectional area (r = 0.57, p = 0.04), soleus physiological cross-sectional area (PCSA-IAAF r = 0.77, p < 0.01, CI± 0.28 to 0.94), Achilles tendon thickness (r = 0.65, p < 0.01), and soleus muscle-to-tendon ratio (r = 0.68, p = 0.03). None of the gastrocnemius characteristics were associated with marathon performance. We concluded that a larger soleus muscle with a thicker Achilles tendon is associated with better marathon performance. Based on these results, it can be concluded the morphological characteristics of the lower leg muscle–tendon unit correlate with running performance.

scholarly journals Epidemiology of injuries among U18, U19, U21 and senior elite netball players

2020 ◽  
Vol 32 (1) ◽  
pp. 1-6
Author(s):  
Colleen Sinclair ◽  
Frederik Coetzee ◽  
Robert Schall
Keyword(s):  
South Africa ◽  
Achilles Tendon ◽  
Abrupt Change ◽  
Body Part ◽  
Lower Leg ◽  
Overuse Injuries ◽  
Match Play ◽  
Substantial Body ◽  
Change Of Direction ◽  
Acute Injuries

Background: Despite a substantial body of literature on injuries among elite netball players in South Africa, no study reports on the timing and type of injuries and the reason for injuries. Objective: To determine the epidemiology of injuries in U18, U19, U21 and senior netball players in the Free State (FS), South Africa, over two consecutive netball seasons (2017/2018). Methods: An injury questionnaire was used to collect data on 96 eligible players. Results: A total of 48 injuries were reported. The profile of injuries revealed that 58% (n=28) of the injuries occurred during matches, 29% (n=14) during practice and 13% (n=6) during preseason training. Acute injuries accounted for 54% (n=26) of the total, while 46% (n=22) were overuse injuries. A third of all the injuries were re-injuries. The centre (C) position had the highest incidence of injuries in players (n=14; 29%). The ankle was the most frequently injured body part (n=18; 36%), followed by the lower leg and Achilles tendon (n=6; 13%) thus largely the ligaments and muscles. The overall incidence rate of injuries during match play was 33.9 injuries per 1 000 hours of match play. Conclusion: Preventative strategies should consist of ankle and lower leg strengthening and neuromuscular balance techniques. The focus should be on correct landing techniques, results of abrupt change of direction movements and short bursts of speed.

Lower Leg Anatomical Correlates to Performance and Metabolism from Flywheel-based Exercise

2020 ◽  
Vol 5 (1) ◽  
pp. 41-51
Author(s):  
Rachel A. Perry ◽  
Jake L. Martin ◽  
Samantha D. Vickers ◽  
Greta M. Cesarz ◽  
Ling Bai ◽  
...  
Keyword(s):  
Achilles Tendon ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Lower Leg ◽  
Triceps Surae ◽  
Net Energy ◽  
Joint Movement ◽  
Leg Length ◽  
Cross Sectional ◽  
Limited Degree

AbstractLower leg exercises are impacted by the anatomy of the triceps surae-Achilles tendon complex. Such exercises may utilize series elastic energy (SEE), temporarily stored within the Achilles tendon, to augment forces exerted by the triceps surae. While SEE's contribution to bipedal jumping and walking have been assessed, other lower leg exercises yet to receive similar scrutiny include seated calf presses done on flywheel-based hardware. Current subjects did two identical calf press workouts on a flywheel ergometer. The following three variables were obtained from workouts–the total work (TW) performed, net energy costs, and peak blood lactate concentration ([BLa−]). With multivariate regression, four variables correlated with each criterion measures’ variance–lower leg length (LLL) and cross-sectional area (CSA), as well as the lengths of the triceps surae (ML) and Achilles tendon (ATL). Our predictor variables correlated to significant amounts of TW and net energy cost, but not [BLa−] variance. Univariate matrices showed CSA was the best overall predictor for our criterion measures, while ML and ATL were generally weaker correlates. ATL did not have as great an impact as with other lower leg exercises; likely because the slow rate of ankle joint movement greatly limited SEE activity. The limited degree of foot support for ergometer repetitions was also a factor that likely weakened ATL's impact as a correlate. More research on anatomy's impact on this novel form of exercise is warranted.

The potential of 3-D woven composites exemplified in a composite component for a lower-leg prosthesis

1996 ◽  
Vol 27 (4) ◽  
pp. 271-277 ◽  
Author(s):  
L. Limmer ◽  
G. Weissenbach ◽  
D. Brown ◽  
R. McIlhagger ◽  
E. Wallace
Keyword(s):  
Lower Leg ◽  
Woven Composites ◽  
Composite Component ◽  
Leg Prosthesis
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