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https://www.readbyqxmd.com/read/29146284/supervised-learning-techniques-and-their-ability-to-classify-a-change-of-direction-task-strategy-using-kinematic-and-kinetic-features
#1
Chris Richter, Enda King, Eanna Falvey, Andrew Franklyn-Miller
This study examines the ability of commonly used supervised learning techniques to classify the execution of a maximum effort change of direction task into predefined movement pattern as well as the influence of fuzzy executions and the impact of selected features (e.g. peak knee flexion) towards classification accuracy. The experiment utilized kinematic and kinetic data from 323 male subjects with chronic athletic groin pain. All subjects undertook a biomechanical assessment and had been divided previously into 3 different movement strategies in an earlier paper...
October 31, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29129134/divided-attention-during-cutting-influences-lower-extremity-mechanics-in-female-athletes
#2
Thomas Gus Almonroeder, Thomas Kernozek, Stephen Cobb, Brooke Slavens, Jinsung Wang, Wendy Huddleston
Anterior cruciate ligament (ACL) injuries in basketball appear to be more common when players are in possession of the ball. The greater risk of ACL injury when in possession of the ball may result from the athlete's inability to fully attend to their movement. However, it is also possible that having to carry/manipulate the ball restricts the athlete's ability to utilise their upper extremities for stability during a manoeuvre. The purpose of this study was to explore how possession of a basketball and divided attention influence lower extremity mechanics during cutting and landing...
November 13, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/29128876/internal-femoral-component-malrotation-in-tka-significantly-alters-tibiofemoral-kinematics
#3
Thomas J Heyse, Bilal F El-Zayat, Ronny De Corte, Yan Chevalier, Susanne Fuchs-Winkelmann, Luc Labey
PURPOSE: Femoral component malrotation in total knee arthroplasty (TKA) is clinically proven to cause dissatisfaction and impaired function. This study is an attempt to characterize the tibiofemoral kinematics following femoral malrotation in posterior stabilized (PS) TKA. It was hypothesized that internal malrotation would introduce the most pronounced changes. METHODS: Six fresh-frozen cadaver specimens were mounted in a kinematic rig. Three motion patterns were applied with the native knee and following PS TKA (passive motion, open chain extension, and squatting) while infrared cameras recorded the trajectories of markers attached to femur and tibia...
November 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29123654/a-prospective-cohort-study-on-comparison-of-early-outcome-of-classical-ponseti-and-modified-ponseti-post-tenotomy-in-clubfoot-management
#4
Joseph Olorunsogo Mejabi, Oluwadare Esan, Olayinka Oladiran Adegbehingbe, Joseph Effiong Asuquo, Akinyele Lawrence Akinyoola
Introduction: Ponseti method has become the main treatment modality for the management of clubfoot producing good long-term results. However, variation in cast application post tenotomy has not been evaluated. Methods: A prospective cohort study involving 40 patients with 67 clubfeet were randomized into two groups: 32 above knee cast (AKC) and 35 below knee cast (BKC) after percutaneous tenotomy. All had foot abduction brace after post tenotomy cast. The median age was 21 weeks (range: 1-104 weeks) and 1...
December 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/29105312/acute-effect-of-a-resistance-exercise-session-on-markers-of-cartilage-breakdown-and-inflammation-in-women-with-rheumatoid-arthritis
#5
Ana Carolina Pereira Nunes Pinto, Jamil Natour, Charlles Heldan de Moura Castro, Marina Eloi, Império Lombardi Junior
AIM: To assess the acute effect of resistance exercise (RE) on circulating biomarkers of cartilage breakdown and inflammation in women with rheumatoid arthritis (RA). METHODS: Thirty-four volunteers (17 with and 17 without RA), participated in a 25 min RE session (knee extension, knee flexion, hip abduction and hip adduction) with one set of 12 repetitions at 50% of one repetition maximum (1RM) and one set of eight repetitions at 75% of 1RM. Blood samples were collected 30 and 5 min before, immediately after and 1, 2 and 24 h after the session...
November 3, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/29096985/dual-task-and-anticipation-impact-lower-limb-biomechanics-during-a-single-leg-cut-with-body-borne-load
#6
Kayla D Seymore, Sarah E Cameron, Jonathan T Kaplan, John W Ramsay, Tyler N Brown
This study quantified how a dual cognitive task impacts lower limb biomechanics during anticipated and unanticipated single-leg cuts with body borne load. Twenty-four males performed anticipated and unanticipated cuts with and without a dual cognitive task with three load conditions: no load (∼6 kg), medium load (15% of BW), and heavy load (30% of BW). Lower limb biomechanics were submitted to a repeated measures linear mixed model to test the main and interaction effects of load, anticipation, and dual task...
October 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29077638/gait-kinematics-in-individuals-with-acute-and-chronic-patellofemoral-pain
#7
Aaron Fox, Reed Ferber, Natalie Saunders, Sean Osis, Jason Bonacci
PURPOSE: This study aimed to identify the discriminating kinematic gait characteristics between individuals with acute and chronic patellofemoral pain (PFP), and healthy controls. METHODS: Ninety-eight runners with PFP (39 male, 59 female) and 98 healthy control runners (38 male, 60 female) ran on a treadmill at a self-selected speed while three-dimensional lower limb kinematic data were collected. Runners with PFP were split into acute (n = 25) and chronic (n = 73) sub-groups based on whether they had been experiencing pain for less or greater than three months, respectively...
October 26, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29070966/psychometric-properties-of-a-clinical-strength-assessment-protocol-in-people-with-multiple-sclerosis
#8
Mark M Mañago, Jeffrey R Hebert, Margaret Schenkman
BACKGROUND: Strength training in people with multiple sclerosis (MS) is an important component of rehabilitation, but it can be challenging for clinicians to quantify strength accurately and reliably. This study investigated the psychometric properties of a clinical strength assessment protocol using handheld dynamometry and other objective, quantifiable tests for the lower extremities and trunk in people with MS. METHODS: This study determined discriminant validity between 25 participants with MS and 25 controls and between participants with MS who had higher versus lower disability; test-retest reliability across 7 to 10 days; and response stability...
September 2017: International Journal of MS Care
https://www.readbyqxmd.com/read/29067818/kinetics-of-the-lower-limb-during-two-typical-tai-chi-movements-in-the-elderly
#9
Jing Xian Li, Nok-Yeung Law
Tai Chi (TC) is a recommended exercise for elderly people; however, its loading on the joints of the lower limbs is unknown. This study examined the 3D kinetics of the lower limbs during two typical TC movements and walking in the elderly. Fifteen experienced TC practitioners participated. Ground reaction forces, joint moments and time-to-peak joint moment generation were analysed. Compared with walking, both TC movements generated significantly (1) smaller peak ground reaction forces in all directions, except the anterior; (2) larger hip extension, adduction and internal rotational moments, knee adduction/abduction and internal rotation moments and eversion/inversion and external/internal moments of ankle-foot; and (3) longer peak moment generation time for hip extension, adduction and internal rotation, knee extension and ankle dorsiflexion and inversion...
October 25, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/29065078/biomechanical-differences-of-multidirectional-jump-landings-among-female-basketball-and-soccer-players
#10
Jeffrey B Taylor, Kevin R Ford, Randy J Schmitz, Scott E Ross, Terry A Ackerman, Sandra J Shultz
Taylor, JB, Ford, KR, Schmitz, RJ, Ross, SE, Ackerman, TA, and Shultz, SJ. Biomechanical differences of multidirectional jump landings among female basketball and soccer players. J Strength Cond Res 31(11): 3034-3045, 2017-Anterior cruciate ligament (ACL) injury prevention programs are less successful in basketball than soccer and may be due to distinct movement strategies that these athletes develop from sport-specific training. The purpose of this study was to identify biomechanical differences between female basketball and soccer players during multidirectional jump landings...
November 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29060894/the-external-force-associated-with-callus-formation-under-the-first-metatarsal-head-is-reduced-by-wearing-rocker-sole-shoes
#11
Ayumi Amemiya, Rena Okonogi, Hiroki Yamakawa, Kaori Susumu, Tatsuya Jitsuishi, Hisayoshi Sugawara, Yuji L Tanaka, Masatoshi Komiyama, Taketoshi Mori
INTRODUCTION: Callus is one of the main causes of diabetic foot ulcers. Therefore, preventing callus formation is very important. In a previous study, it was clarified that callus formation under the first metatarsal head (MTH) is associated with high shear stress time integral/pressure time integral (SPR-i). another study, it was clarified that rocker sole shoes are effective in reducing peak pressure under the first MTH. Therefore, we hypothesized that rocker sole shoes reduce SPR-i under the first MTH...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29037822/how-does-level-and-type-of-experience-affect-measurement-of-joint-range-of-motion
#12
Russell R Russo, Matthew B Burn, Sabir K Ismaily, Brayden J Gerrie, Shuyang Han, Jerry Alexander, Christopher Lenherr, Philip C Noble, Joshua D Harris, Patrick C McCulloch
OBJECTIVES: Comparison of range of motion measurements by 3 types of investigators with different levels and types of training using three different measurement techniques. The study hypothesis was that the accuracy and precision of range of motion measurements would vary based on (1) the level and type of experience of the investigator and (2) the measurement technique used. DESIGN/SETTING: Descriptive laboratory study. PARTICIPANTS: Ten fresh frozen cadavers (20 upper and 20 lower extremities)...
October 13, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/29035979/effect-of-a-commercially-available-footwear-insole-on-biomechanical-variables-associated-with-common-running-injuries
#13
Ryan T Lewinson, Darren J Stefanyshyn
OBJECTIVE: To determine whether Dr. Scholl's Active Series (DSAS) footwear insoles alter biomechanical variables associated with running injuries. DESIGN: Randomized, controlled experiment. SETTING: Sport medicine and biomechanics gait analysis laboratory. PARTICIPANTS: Fifteen healthy adults. INTERVENTIONS: The control condition was the participant's own athletic footwear. The experimental condition was the participant's own athletic footwear plus a DSAS insole...
October 10, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29023365/soft-smart-garments-for-lower-limb-joint-position-analysis
#14
Massimo Totaro, Tommaso Poliero, Alessio Mondini, Chiara Lucarotti, Giovanni Cairoli, Jesùs Ortiz, Lucia Beccai
Revealing human movement requires lightweight, flexible systems capable of detecting mechanical parameters (like strain and pressure) while being worn comfortably by the user, and not interfering with his/her activity. In this work we address such multifaceted challenge with the development of smart garments for lower limb motion detection, like a textile kneepad and anklet in which soft sensors and readout electronics are embedded for retrieving movement of the specific joint. Stretchable capacitive sensors with a three-electrode configuration are built combining conductive textiles and elastomeric layers, and distributed around knee and ankle...
October 12, 2017: Sensors
https://www.readbyqxmd.com/read/28992771/reliability-and-validity-of-hip-stability-isometric-test-hipsit-a-new-method-to-assess-hip-posterolateral-muscle-strength
#15
Gabriel Peixoto Leão Almeida, Helena Larissa das Neves Rodrigues, Bruno Wesley de Freitas, Pedro Olavo de Paula Lima
Study Design Cross-sectional study. Background The Hip Stability Isometric Test (HipSIT) evaluates the strength of the hip posterolateral stabilizers in a position that favors greater activation of the gluteus maximus and gluteus medius and lower activation of the tensor fascia lata. Objectives To check the validity and reliability of the HipSIT and to evaluate the HipSIT in women with patellofemoral pain (PFP). Methods The HipSIT was evaluated with a hand-held dynamometer. During testing the participants were side-lying, with the legs positioned at 45° of hip flexion and 90° of knee flexion...
October 9, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28978462/sex-specific-kinetic-and-kinematic-indicators-of-medial-tibiofemoral-force-during-walking-and-running
#16
Jean-Francois Esculier, Richard W Willy, Michael W Baggaley, Stacey A Meardon, John D Willson
BACKGROUND: Our aims were to (1) Evaluate sex-specific contributions of peak knee flexion moment (pKFM) and peak knee adduction moment (pKAM) in medial tibiofemoral joint (TFJ) force during walking and running; (2) identify kinematic variables to estimate peak medial TFJ force. METHODS: Eighty-seven runners participated (36 females, 51 males; age=23.0±3.8years (1 standard deviation)). Kinematics and kinetics data were collected during treadmill walking (1.3m/s) and running (3...
October 1, 2017: Knee
https://www.readbyqxmd.com/read/28963938/coupling-motion-between-rearfoot-and-hip-and-knee-joints-during-walking-and-single-leg-landing
#17
Yuta Koshino, Masanori Yamanaka, Yuya Ezawa, Takumi Okunuki, Tomoya Ishida, Mina Samukawa, Harukazu Tohyama
The objective of the current study was to investigate the kinematic relationships between the rearfoot and hip/knee joint during walking and single-leg landing. Kinematics of the rearfoot relative to the shank, knee and hip joints during walking and single-leg landing were analyzed in 22 healthy university students. Kinematic relationships between two types of angular data were assessed by zero-lag cross-correlation coefficients and coupling angles, and were compared between joints and between tasks. During walking, rearfoot eversion/inversion and external/internal rotation were strongly correlated with hip adduction/abduction (R=0...
September 22, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28950803/changes-in-gait-and-plantar-foot-loading-upon-using-vibrotactile-wearable-biofeedback-system-in-patients-with-stroke
#18
Christina Zong-Hao Ma, Yong-Ping Zheng, Winson Chiu-Chun Lee
BACKGROUND: Patients with stroke walk with excessive foot inversion at the affected side, which may disturb their balance and gait. OBJECTIVES: This study aimed to investigate the effects of instant biofeedback of plantar force at the medial and lateral forefoot regions on gait and plantar foot loading in patients with stroke. METHODS: A total of eight patients with hemiplegic stroke, who had flexible rearfoot varus deformity at the affected side, participated in this study...
September 27, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/28946996/motion-rehab-ave-3d-a-vr-based-exergame-for-post-stroke-rehabilitation
#19
Mateus Trombetta, Patrícia Paula Bazzanello Henrique, Manoela Rogofski Brum, Eliane Lucia Colussi, Ana Carolina Bertoletti De Marchi, Rafael Rieder
BACKGROUND AND OBJECTIVE: Recent researches about games for post-stroke rehabilitation have been increasing, focusing in upper limb, lower limb and balance situations, and showing good experiences and results. With this in mind, this paper presents Motion Rehab AVE 3D, a serious game for post-stroke rehabilitation of patients with mild stroke. The aim is offer a new technology in order to assist the traditional therapy and motivate the patient to execute his/her rehabilitation program, under health professional supervision...
November 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28944715/balance-training-enhances-motor-coordination-during-a-perturbed-side-step-cutting-task
#20
Anderson Souza Oliveira, Priscila de Brito Silva, Morten Enemark Lund, Dario Farina, Uwe Gustav Kersting
Study Design Controlled laboratory study. Background Balance training (BTR) may improve motor coordination, however little is known about the changes in motor coordination during unexpected perturbations to postural control following BTR. Objectives To study the effects of BTR on motor coordination and knee mechanics during perturbed side-step cutting maneuvers in healthy adults. Methods Twenty-six healthy men were randomly assigned to a training group (TG) or control (CG). Before BTR, subjects performed unperturbed, 90° side-step cutting maneuvers and one unexpected perturbed cut (10-cm translation of a moveable platform)...
September 23, 2017: Journal of Orthopaedic and Sports Physical Therapy
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