A Simple Method for Measuring Lower Limb Stiffness in Hopping

2018 ◽  
pp. 121-138
Author(s):  
Teddy Caderby ◽  
Georges Dalleau
Keyword(s):  
Lower Limb ◽  
Simple Method ◽  
Limb Stiffness ◽  
Lower Limb Stiffness

Modulation of Stretch-Shortening-Cycle Behavior With Eccentric Loading of Triceps Surae: A Possible Therapeutic Mechanism

2017 ◽  
Vol 26 (2) ◽  
pp. 151-158 ◽  
Author(s):  
James R. Debenham ◽  
William I. Gibson ◽  
Mervyn J. Travers ◽  
Amity C. Campbell ◽  
Garry T. Allison
Keyword(s):  
Outcome Measures ◽  
Lower Limb ◽  
Motor Performance ◽  
Plantar Flexion ◽  
Triceps Surae ◽  
Temporal Muscle ◽  
Ankle Kinematics ◽  
Limb Stiffness ◽  
Stretch Shortening Cycle ◽  
Lower Limb Stiffness

Context:Eccentric exercises are increasingly being used to treat lower-limb musculoskeletal conditions such as Achilles tendinopathy. Despite widespread clinical application and documented efficacy, mechanisms underpinning clinical benefit remain unclear. Positive adaptations in motor performance are a potential mechanism.Objective:To investigate how an eccentric loading intervention influences measures of stretch-shortening-cycle (SSC) behavior during a hopping task.Design:Within-subjects repeated-measures observational study.Setting:University motion-analysis laboratory.Participants:Healthy adults.Interventions:A single intervention of 5 sets of 10 eccentric plantar-flexion contractions at 6 repetitions maximum using a commercial seated calf-raise machine.Main Outcome Measures:Lower-limb stiffness, sagittal-plane ankle kinematics, and temporal muscle activity of the agonist (soleus) and antagonist (tibialis anterior) muscles, measured during submaximal hopping on a custom-built sledge-jump system.Results:Eccentric loading altered ankle kinematics during submaximal hopping; peak angle shifted to a less dorsiflexed position by 2.9° and ankle angle precontact shifted by 4.4° (P < .001). Lower-limb stiffness increased from 5.9 to 6.8 N/m (P < .001), while surface EMG measures of soleus occurred 14–44% earlier (P < .001) after the loading intervention.Conclusions:These findings suggest that eccentric loading alters SSC behavior in a manner reflective of improved motor performance. Decreased ankle excursion, increased lower-limb stiffness, and alterations in motor control may represent a positive adaptive response to eccentric loading. These findings support the theory that mechanisms underpinning eccentric loading for tendinopathy may in part be due to improved “buffering” of the tendon by the neuromuscular system.

Lower Limb Stiffness

2012 ◽  
Vol 34 (6) ◽  
pp. 94-101 ◽  
Author(s):  
John J. McMahon ◽  
Paul Comfort ◽  
Stephen Pearson
Keyword(s):  
Lower Limb ◽  
Limb Stiffness ◽  
Lower Limb Stiffness

Lower Limb Stiffness

2012 ◽  
Vol 34 (5) ◽  
pp. 70-73 ◽  
Author(s):  
John James McMahon ◽  
Paul Comfort ◽  
Stephen Pearson
Keyword(s):  
Lower Limb ◽  
Limb Stiffness ◽  
Lower Limb Stiffness

Age Effect on Jumping Techniques and Lower Limb Stiffness During Vertical Jump

2004 ◽  
Vol 12 (3) ◽  
pp. 209-219 ◽  
Author(s):  
LI-I WANG ◽  
DER-CHIA LIN ◽  
CHENFU HUANG
Keyword(s):  
Lower Limb ◽  
Vertical Jump ◽  
Age Effect ◽  
Limb Stiffness ◽  
Lower Limb Stiffness

scholarly journals Relationship between Connective Tissue Morphology and Lower-Limb Stiffness in Endurance Runners. A Prospective Study

2021 ◽  
Vol 18 (16) ◽  
pp. 8453
Author(s):  
Alberto Rubio-Peirotén ◽  
Felipe García-Pinillos ◽  
Diego Jaén-Carrillo ◽  
Antonio Cartón-Llorente ◽  
Ferrán Abat ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Lower Limb ◽  
Time Trial ◽  
Influential Factors ◽  
Cross Sectional ◽  
Positive Correlation ◽  
Tissue Morphology ◽  
Limb Stiffness ◽  
The Relationship ◽  
Lower Limb Stiffness

Background: The lower limb behaves like a spring compressing and decompressing during running, where lower-limb stiffness is one of the most influential factors. This prospective observational study is aimed at examining the relationship between the connective tissue morphology and lower-limb stiffness and investigating whether the barefoot/shod condition influences on such relationship. Methods: 14 male amateur runners (10-km time trial <50′) were included. Data were recorded over one session, where participants ran 2 trials (i.e., barefoot and shod conditions) of 3 minutes at 12 km/h, where running spatiotemporal parameters and vertical (Kvert) and leg stiffness (Kleg) were obtained. Prior to testing trials, thickness and cross-sectional area (CSA) were recorded for Achilles (AT) and patellar tendons (PT) and plantar fascia (PF) with ultrasound. Results: Under barefoot condition, a positive correlation was found between Kleg and AT-thickness and CSA and PF-thickness; and between Kvert and AT-thickness and PF thickness. Under shod condition, a positive correlation was found between Kleg and PT-CSA and PT-thickness, and between Kvert and PT-CSA and PT-thickness. Conclusions: The results reveal a specificity of the relationship between the lower-limb stiffness and the morphology of the connective tissue. Greater tendon shows higher lower-limb stiffness when that tendon is specially demanded by the function.

Lower-limb stiffness mediates speed but not turning angle during unplanned side-step cutting

2020 ◽  
pp. 110132
Author(s):  
Bernard X.W. Liew ◽  
Laura Sullivan ◽  
Susan Morris ◽  
Kevin Netto
Keyword(s):  
Lower Limb ◽  
Turning Angle ◽  
Limb Stiffness ◽  
Lower Limb Stiffness

scholarly journals The effects of plyometric jump training on lower limb stiffness in healthy individuals: A meta-analytical comparison

2021 ◽  
Author(s):  
Jason Moran ◽  
Bernard Liew ◽  
Rodrigo Ramirez-Campillo ◽  
Urs Granacher ◽  
Yassine Negra ◽  
...  
Keyword(s):  
Lower Limb ◽  
Healthy Individuals ◽  
Analytical Comparison ◽  
Jump Training ◽  
Limb Stiffness ◽  
Lower Limb Stiffness

scholarly journals Development of lower limb stiffness and its contribution to maximum vertical jumping power during adolescence

2009 ◽  
Vol 212 (22) ◽  
pp. 3737-3742 ◽  
Author(s):  
T. Korff ◽  
S. L. Horne ◽  
S. J. Cullen ◽  
A. J. Blazevich
Keyword(s):  
Lower Limb ◽  
Limb Stiffness ◽  
Vertical Jumping ◽  
Lower Limb Stiffness
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