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https://www.readbyqxmd.com/read/28731978/differences-in-spatiotemporal-parameters-between-trained-runners-and-untrained-participants
#1
Josué Gómez-Molina, Ana Ogueta-Alday, Christopher Stickley, Jesús Cámara, Jon Cabrejas-Ugartondo, Juan García-López
Gómez-Molina, J, Ogueta-Alday, A, Stickley, C, Tobalina, JC, Cabrejas-Ugartondo, J, and García-López, J. Differences in spatiotemporal parameters between trained runners and untrained participants. J Strength Cond Res 31(8): 2169-2175, 2017-The aim of this study was to compare the spatiotemporal parameters of trained runners and untrained participants with the same foot strike pattern (rearfoot) during running at controlled speeds. Twenty-one participants were classified in 2 groups according to their training experience: Trained (n = 10, amateur runners with long distance training experience) and Untrained (n = 11, healthy untrained participants)...
August 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28730921/kinematic-repeatability-of-a-multi-segment-foot-model-for-dance
#2
Sarah L Carter, Nahoko Sato, Luke S Hopper
The purpose of this study was to determine the intra and inter-assessor repeatability of a modified Rizzoli Foot Model for analysing the foot kinematics of ballet dancers. Six university-level ballet dancers performed the movements; parallel stance, turnout plié, turnout stance, turnout rise and flex-point-flex. The three-dimensional (3D) position of individual reflective markers and marker triads was used to model the movement of the dancers' tibia, entire foot, hindfoot, midfoot, forefoot and hallux. Intra and inter-assessor reliability demonstrated excellent (ICC ≥ 0...
July 21, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28720138/plantar-plate-pathology-is-associated-with-erosive-disease-in-the-painful-forefoot-of-patients-with-rheumatoid-arthritis
#3
Heidi J Siddle, Richard J Hodgson, Elizabeth M A Hensor, Andrew J Grainger, Anthony C Redmond, Richard J Wakefield, Philip S Helliwell
BACKGROUND: Disease-related foot pathology is recognised to have a significant impact on mobility and functional capacity in the majority of patients with rheumatoid arthritis (RA). The forefoot is widely affected and the metatarsophalangeal (MTP) joints are the most common site of symptoms. The plantar plates are the fibrocartilaginous distal attachments of the plantar fascia inserting into the five proximal phalanges. Together with the transverse metatarsal ligament they prevent splaying of the forefoot and subluxation of the MTP joints...
July 18, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28713254/short-term-effects-of-thoracic-spine-manipulation-on-the-biomechanical-organisation-of-gait-initiation-a-randomized-pilot-study
#4
Sébastien Ditcharles, Eric Yiou, Arnaud Delafontaine, Alain Hamaoui
Speed performance during gait initiation is known to be dependent on the capacity of the central nervous system to generate efficient anticipatory postural adjustments (APA). According to the posturo-kinetic capacity (PKC) concept, any factor enhancing postural chain mobility and especially spine mobility, may facilitate the development of APA and thus speed performance. "Spinal Manipulative Therapy High-Velocity, Low-Amplitude" (SMT-HVLA) is a healing technique applied to the spine which is routinely used by healthcare practitioners to improve spine mobility...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28705486/the-influence-of-adipose-tissue-location-on-postural-control
#5
Joanna Cieślińska-Świder, Mariusz Paweł Furmanek, Janusz Wiesław Błaszczyk
A growing body of evidence suggests, that excessive body weight is inseparably connected with postural instability. In none of previous studies, body weight distribution has been considered as a factor, which may affect results of a static posturography. The purpose of the present study is to quantify some center of foot pressure (COP) characteristics in 40 obese women with android type of obesity (waist-to-hip ratio - WHR≥0.85, BMI: 37.5±5.4) and 40 obese women with gynoid type of obesity (WHR<0.85, BMI: 36...
June 27, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28698539/croatian-rotatory-oblique-three-dimensional-osteotomy-croto-a-modified-wilson-s-osteotomy-for-adult-hallux-valgus-intended-to-prevent-dorsal-displacement-of-the-distal-fragment-and-to-reduce-shortening-of-the-first-metatarsal-bone
#6
Robert Kolundžić, Mladen Mađarević, Vladimir Trkulja, Tomislav Crnković, Igor Šmigovec, Daniel Matek
Aim To evaluate biomechanical and clinical outcomes of a newly developed modification of the Wilson's osteotomy for hallux valgus: a three-dimensional subcaptial correction of the metatarsal head position with a simultaneous lateral and plantar shift with derotation intended to reduce displacement of the distal fragment and shortening of the first metatarsal bone. Methods Thirty four feet (28 female patients) underwent the new procedure and were evaluated before and 12 to 84 months (median=25.5) after the surgery...
August 1, 2017: Medicinski Glasnik
https://www.readbyqxmd.com/read/28689820/reverse-total-shoulder-glenoid-baseplate-stability-with-superior-glenoid-bone-loss
#7
Elise J Martin, Thomas R Duquin, Mark T Ehrensberger
BACKGROUND: Superior wear of the glenoid bone is common in patients with rotator cuff arthropathy. This can become a treatment challenge for patients who require shoulder arthroplasty. In reverse shoulder arthroplasty (RSA), glenoid bone loss may affect the stability of baseplate fixation. The primary purpose of this biomechanical laboratory study was to assess the initial fixation stability of RSA glenosphere baseplates in the presence of variable amounts of superior glenoid bone loss...
July 6, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28687150/virtually-optimized-insoles-for-offloading-the-diabetic-foot-a-randomized-crossover-study
#8
S Telfer, J Woodburn, A Collier, P R Cavanagh
Integration of objective biomechanical measures of foot function into the design process for insoles has been shown to provide enhanced plantar tissue protection for individuals at-risk of plantar ulceration. The use of virtual simulations utilizing numerical modeling techniques offers a potential approach to further optimize these devices. In a patient population at-risk of foot ulceration, we aimed to compare the pressure offloading performance of insoles that were optimized via numerical simulation techniques against shape-based devices...
June 24, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28649018/rear-foot-kinematics-when-wearing-lateral-wedge-insoles-and-foot-alignment-influence-the-effect-of-knee-adduction-moment-for-medial-knee-osteoarthritis
#9
Tomonori Sawada, Kenji Tanimoto, Kazuki Tokuda, Yoshitaka Iwamoto, Yuta Ogata, Masaya Anan, Makoto Takahashi, Nobuhiro Kito, Koichi Shinkoda
Lateral wedge insoles (LWIs) are prescribed for patients with medial knee osteoarthritis to reduce the external knee adduction moment (KAM). However, the biomechanical effects of LWIs are limited in some patients. The purpose of this study was to investigate whether the biomechanical effects of LWIs depend on individual foot alignment and to examine the relationship between change in KAM and changes in foot and ankle biomechanics when wearing LWIs. Twenty-one patients participated in this study. They were categorized into normal or abnormal foot groups based on the foot posture index (FPI)...
June 15, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28646745/automatic-postural-responses-are-generated-according-to-feet-orientation-and-perturbation-magnitude
#10
Nametala Maia Azzi, Daniel Boari Coelho, Luis Augusto Teixeira
This investigation aimed to assess the effect of feet orientation angle in upright stance on automatic postural responses (APRs) to mechanical perturbations of different magnitudes. Perturbation was produced by releasing suddenly a load attached to the participant's trunk, leading to forward body sway. We evaluated APRs to loads corresponding to 5% (low) and 10% (high) of the participant's body weight, comparing the following feet orientations: parallel, preferred (M=10.46°), 15° and 30° for each foot regarding the body midline...
June 21, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28644193/heel-raised-foot-posture-do-not-affect-trunk-and-lower-extremity-biomechanics-during-a-barbell-back-squat-in-recreational-weightlifters
#11
Szu-Ping Lee, Carrie Gillis, Javier J Ibarra, Derek Oldroyd, Ryan Zane
It is claimed that weightlifting shoes with a raised heel may lead to a more upright trunk posture, and thus reduce the risk of back injuries during a barbell back squat. These proclaimed biomechanical effects have not been thoroughly investigated. The purpose of this study was to compare trunk and lower extremity biomechanics during barbell back squats in 3 foot postures.14 recreational weightlifters (7 male and 7 female) between the ages of 18-50 performed barbell back squats in 3 conditions (barefoot on a flat surface, barefoot on a heel-raised platform, and wearing heel-raised weightlifting shoes) at 80% of their 1-RM...
June 19, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28641058/acute-kinematics-changes-in-marathon-runners-using-different-footwear
#12
Tania Socorro Amorim Soares, Camila Fonseca de Oliveira, Federico Pizzuto, Rui Manuel Garganta, João Paulo Vila-Boas, Mario Casimiro da Anunciação Paiva
The effects of running with or without shoes on injury prevention have been extensively studied, and several investigations have assessed biomechanical differences between them. However, findings are not consensual and further insights on biomechanical load associated with differently shod or barefoot conditions may be needed. This study aimed to observe if habitually shod marathon runners show acute alterations when running barefoot or with minimalist shoes, and to determine whether the running kinematical adaptations of wearing minimalist shoes were similar to barefoot running...
June 22, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28639519/knee-joint-kinetics-in-response-to-multiple-three-dimensional-printed-customised-foot-orthoses-for-the-treatment-of-medial-compartment-knee-osteoarthritis
#13
Richard Allan, James Woodburn, Scott Telfer, Mandy Abbott, Martijn Pm Steultjens
The knee adduction moment is consistently used as a surrogate measure of medial compartment loading. Foot orthoses are designed to reduce knee adduction moment via lateral wedging. The 'dose' of wedging required to optimally unload the affected compartment is unknown and variable between individuals. This study explores a personalised approach via three-dimensional printed foot orthotics to assess the biomechanical response when two design variables are altered: orthotic length and lateral wedging. Foot orthoses were created for 10 individuals with symptomatic medial knee osteoarthritis and 10 controls...
June 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28634682/searching-for-the-sweet-spot-the-foot-rotation-and-parallel-engagement-of-ankle-ligaments-in-maximizing-injury-tolerance
#14
Bingbing Nie, Jason L Forman, Alexander R Mait, John-Paul Donlon, Matthew B Panzer, Richard W Kent
Ligament sprains, defined as tearing of bands of fibrous tissues within ligaments, account for a majority of injuries to the foot and ankle complex in field-based sports. External rotation of the foot is considered the primary injury mechanism of syndesmotic ankle sprains with concomitant flexion and inversion/eversion associated with particular patterns of ligament trauma. However, the influence of the magnitude and direction of loading vectors to the ankle on the in situ stress state of the ligaments has not been quantified in the literature...
June 20, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28633785/the-lisfranc-amputation-a-more-reliable-level-of-amputation-with-proper-intraoperative-tendon-balancing
#15
Christopher J Greene, Christopher Bibbo
Traditional transmetatarsal amputations are a reliable level of amputation. However, amputations at the Lisfranc level have met with limited success owing to improper biomechanics resulting from tendon imbalance, ultimately leading to foot deformity positions and an unstable soft tissue envelope with ensuing skin breakdown, infection, and below-the-knee amputation. We describe proper tendon rebalancing that results in improved biomechanics and a more reliable and stable amputation at the more proximal Lisfranc level...
July 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28633164/ann-prediction-of-ligament-stiffnesses-for-the-enhanced-predictive-ability-of-a-patient-specific-computational-foot-ankle-model
#16
Ruchi Chande, Jennifer S Wayne
Computational models of diarthrodial joints serve to inform the biomechanical function of these structures, and as such, must be supplied appropriate inputs for performance that is representative of actual joint function. Inputs for these models are sourced from both imaging modalities as well as literature. The latter is often the source of mechanical properties for soft tissues, like ligament stiffnesses; however, such data is not always available for all soft tissues nor is it known for patient specific work...
June 20, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28632061/the-effect-of-unilateral-arm-swing-motion-on-lower-extremity-running-mechanics-associated-with-injury-risk
#17
Cristine Agresta, Christian R Ward, W Geoffrey Wright, Carole A Tucker
Many field sports involve equipment that restricts one or both arms from moving while running. Arm swing during running has been examined from a biomechanical and physiologic perspective but not from an injury perspective. Moreover, only bilateral arm swing suppression has been studied with respect to running. The purpose of this study was to determine the influence of running with one arm restrained on lower extremity mechanics associated with running or sport-related injury. Fifteen healthy participants ran at a self-selected speed with typical arm swing, with one arm restrained and with both arms restrained...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28617260/pes-planus-and-pes-cavus-in-southern-italy-a-5-years-study
#18
Gianmarco Troiano, Nicola Nante, Guglielmo Lucio Citarelli
INTRODUCTION: Baropodometrical digital techniques map the pressures exerted on the foot plant during both static and dynamic loadings. The study of the distribution of such pressures makes it possible to evaluate the postural and locomotory biomechanics together with its pathological variations. METHODS: From January 2011 to August 2016 we conducted a cross sectional study in order to diagnose flatfoot and hollowfoot through the baropodometric analysis, and collecting additional information such as gender and the age...
April 2017: Annali Dell'Istituto Superiore di Sanità
https://www.readbyqxmd.com/read/28594508/lateral-ankle-instability-and-peroneal-tendon-pathology
#19
Michael Isiah Sandlin, Cyrus E Taghavi, Timothy P Charlton, Richard D Ferkel
Surgeons should understand the anatomic, vascular, biomechanical, and predisposing factors related to lateral ankle instability and peroneal tendon injuries, including peroneal tendinitis and tenosynovitis, peroneal tendon tears and ruptures, as well as peroneal tendon subluxation and dislocation. Surgeons should understand the treatment options and recommendations for patients who have lateral ankle instability and peroneal tendon injuries from the perspective of a sports medicine foot and ankle specialist...
February 15, 2017: Instructional Course Lectures
https://www.readbyqxmd.com/read/28594488/fractures-of-the-calcaneus
#20
Mark R Adams, John W Munz, Kenneth L Koury
Calcaneal fractures are potentially devastating injuries. To effectively manage calcaneal fractures, surgeons must understand the anatomy of the calcaneus as well as the surgical techniques necessary to restore normal biomechanics of the foot. Surgeons also must understand calcaneal fracture patterns and classifications; initial management techniques, surgical indications and rationale, temporizing management techniques, surgical approaches, definitive management techniques, and postoperative management for calcaneal fractures; as well as outcomes and common complications of calcaneal fractures...
February 15, 2017: Instructional Course Lectures
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