Marked asymmetry in vertical force (but not contact times) during running in ACL reconstructed athletes &lt;9 months post-surgery despite meeting functional criteria for return to sport.

Thomson, Athol; Einarsson, Einar; Hansen, Clint; Bleakley, Chris; Whiteley, Rodney

doi:10.1016/j.jsams.2018.02.009

Cited by 24 publications

(40 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the present study we only examined nine healthy runners, which may limit the generalization of our results to a broader (i.e., previously injured) population, even though we found moderate-to-large effect sizes in general. Marked asymmetry in vertical force (but not contact times) during running in ACL reconstructed soccer players exist <9 months post-surgery, with these asymmetries also appeared to slightly increase with increasing speed, despite meeting functional criteria for return to sport (Thomson et al, 2018). Using a larger sample, it might be useful to examine if measures of asymmetries are evident more superiorly in rear-foot (as most marathon runners during the 2017 IAAF World Championships; Hanley et al, 2019) compared to forefoot or mid-foot strikers.…”

Section: Limitations and Additional Considerationsmentioning

confidence: 92%

“…The SA is a dimensionless measure of asymmetry that does not suffer from artificial inflation, unlike the symmetry index that requires a reference value (Exell et al, 2012a), and is therefore a robust measure of asymmetry that can be used across kinematic and kinetic variables (Carpes et al, 2010). Marked asymmetry in maximal plantar force (measured using an in-shoe pressure system), but not contact times, slightly increases with increasing treadmill velocity between 12 and 16 km.h −1 for athletes < 9 months post anterior cruciate ligament reconstruction despite having completed functional return to sport criteria (Thomson et al, 2018). Whether the right and left legs typically apply equal ground forces (as measured directly) from a wider range of constant, slow-to-fast running velocities in apparently healthy runners remains unclear.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Running Velocity Does Not Influence Lower Limb Mechanical Asymmetry

Girard

Morin

Ryu

et al. 2019

Front. Sports Act. Living

View full text Add to dashboard Cite

We examined the effect of running velocity upon magnitude and range of asymmetry in the main kinetics and kinematics of treadmill running at constant, submaximal velocities. Nine well-trained, uninjured distance runners ran, in a random order, at seven running velocities (10, 12.5, 15, 17.5, 20, 22.5, and 25 km.h −1) for 60 s (separated by > 90 s of rest) on an instrumented treadmill (ADAL3D-WR, Medical Development, France). Continuous measurement (1,000 Hz) of spatio-temporal, horizontal force production, and spring-mass characteristics was performed and data over 10 consecutive steps (5 right and 5 leg foot contacts after ∼50 s of running) were used for subsequent comparisons. Group mean and the range of asymmetry scores were assessed from the "symmetry angle" (SA) formulae where a score of 0%/100% indicates perfect symmetry/asymmetry. Mean SA scores for spatio-temporal variables were lower than 2%: contact time (0.6 ± 0.1%; range: 0.4-0.7%), aerial time (1.7 ± 0.2%; range: 1.3-2.1%) as well as step length and step frequency (0.7 ± 0.2%; range: 0.5-0.9%). Mean loading rate (5.3 ± 1.1%; range: 4.1-6.9%) and spring mass model [peak vertical force: 3.2 ± 1.6% (range: 2.9-3.4%); maximal downward vertical displacement: 11.2 ± 6.0% (range: 9.2-14.0%); leg compression: 3.6 ± 1.9% (range: 2.9-5.6%); vertical stiffness: 8.8 ± 1.9% (range: 7.1-11.6%); leg stiffness: 1.6 ± 0.6% (range: 1.2-2.9%)] presented larger mean SA values. Mean SA scores ranged 1-4% for duration of braking (1.3 ± 0.3%; range: 0.9-2.0%) and push-off (1.6 ± 0.9%; range: 1.2-2.4%) phases, peak braking (2.4 ± 1.1%; range: 1.6-3.6%), and push-off (1.7 ± 0.9%; range: 1.2-2.2%) forces as well as braking (3.7 ± 2.0%; range: 2.8-5.8%) and push-off (2.1 ± 0.8%; range: 1.3-2.6%) impulses. However, with the exception of braking impulse (P = 0.005), there was no influence of running velocity on asymmetry scores for any of the mechanical variables studied (0.118

show abstract

Section: Limitations and Additional Considerationsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Running Velocity Does Not Influence Lower Limb Mechanical Asymmetry

Girard

Morin

Ryu

et al. 2019

Front. Sports Act. Living

View full text Add to dashboard Cite

show abstract

“…Las tasas de RPD extremidad reconstruida en comparación con la extremidad no afectada, difiriendo sólo mínimamente en algunas pruebas con los jugadores sanos 19 . Además, Thomson et al 18 apuntan que existe una descarga de peso relativamente grande de la extremidad operada a pesar de haberse completado el RPD.…”

Section: Resultsunclassified

“…A la hora del RPD tras la reconstrucción, no todos los participantes lo pueden hacer al mismo nivel previo a la lesión. En el estudio de Howard et al15 sólo el 75% vuelve a la misma categoría mientras que en otros cuatro estudios sí consiguen completar el RPD en el mismo nivel10,14,16,17 .En relación al rendimiento, sólo lo analizan tres estudios[17][18][19] . Se indica que no hay diferencias significativas entre el nivel anterior y posterior a la lesión17 , ni tampoco hubo deficiencias en la…”

unclassified

La vuelta al fútbol tras la reconstrucción del ligamento cruzado anterior

Leirós-Martínez¹,

Núñez²,

Carrera³

2019

Rev And Med Dep

View full text Add to dashboard Cite

Objetivo: analizar las publicaciones recientes que se centran en la vuelta a la práctica futbolística tras la reconstrucción del ligamento cruzado anterior. Método: se revisaron artículos originales inglés, español y portugués publicados en los últimos cinco años en las bases de datos Pubmed, Medline, Scopus, Cinhal y Sport Discus. Resultados: se encontraron 49 artículos y tras la aplicación de criterios de inclusión y exclusión se procedieron a analizar 14 artículos. De estos, 8 tenían una muestra de futbolistas masculinos, 5 con femeninas y uno con ambos sexos. Conclusión: Los artículos seleccionados ponen de relieve que existen ciertos factores que pueden marcar el regreso a la práctica futbolística tras la reconstrucción del ligamento cruzado anterior como el nivel de profesionalización, el dolor, la falta de confianza, el sexo o el tipo de injerto.

show abstract

“…Soccer players might also benefit from the Pedar-X system. In a study [101], the maximum plantar force (Fmax) and contact time (CT) of the injured and uninjured limbs, both for those with less and respectively more than nine months of recovery after surgery (arbitrarily classified into these two groups), evaluated during moderate to fast speed running, were compared in soccer players who underwent ACLR (anterior cruciate ligament reconstruction) when passing the criteria that enabled them to return to sport (RTS). Both groups of soccer players after ACLR and healthy subjects ran at three different velocities on a treadmill.…”

Section: Pedar In Sports Applicationsmentioning

confidence: 99%

Smart Socks and In-Shoe Systems: State-of-the-Art for Two Popular Technologies for Foot Motion Analysis, Sports, and Medical Applications

Drăgulinescu

Zinca

Bucur

et al. 2020

Sensors

View full text Add to dashboard Cite

The present paper reviews, for the first time, to the best of our knowledge, the most recent advances in research concerning two popular devices used for foot motion analysis and health monitoring: smart socks and in-shoe systems. The first one is representative of textile-based systems, whereas the second one is one of the most used pressure sensitive insole (PSI) systems that is used as an alternative to smart socks. The proposed methods are reviewed for smart sock use in special medical applications, for gait and foot pressure analysis. The Pedar system is also shown, together with studies of validation and repeatability for Pedar and other in-shoe systems. Then, the applications of Pedar are presented, mainly in medicine and sports. Our purpose was to offer the researchers in this field a useful means to overview and select relevant information. Moreover, our review can be a starting point for new, relevant research towards improving the design and functionality of the systems, as well as extending the research towards other areas of applications using sensors in smart textiles and in-shoe systems.

show abstract

Marked asymmetry in vertical force (but not contact times) during running in ACL reconstructed athletes <9 months post-surgery despite meeting functional criteria for return to sport.

Cited by 24 publications

References 16 publications

Running Velocity Does Not Influence Lower Limb Mechanical Asymmetry

Running Velocity Does Not Influence Lower Limb Mechanical Asymmetry

La vuelta al fútbol tras la reconstrucción del ligamento cruzado anterior

Smart Socks and In-Shoe Systems: State-of-the-Art for Two Popular Technologies for Foot Motion Analysis, Sports, and Medical Applications

Contact Info

Product

Resources

About