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https://www.readbyqxmd.com/read/28157573/foot-segmental-mobility-during-subphases-of-running-comparative-study-between-two-striking-patterns
#1
Helen Peters, Kevin Deschamps, Giovanni Arnoldo Matricali, Filip Staes
OBJECTIVES: The literature lacks comparative data regarding foot segmental mobility in rearfoot (RFS) and midfoot striking (MFS) patterns. The aim of the study is to quantify the foot segmental mobility during distinct subphases of stance in presence of both striking patterns. METHODS: Twelve participants were instructed to run barefoot at a constant speed of 3.3m/s on a 10-m walkway, while adopting a RFS and a MFS pattern. Multi-segment foot mobility during the impact phase, the absorption phase and the generation phase was subsequently calculated and compared between both conditions...
January 16, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28149661/biomechanical-podiatric-evaluation-in-an-italian-cohort-of-patients-with-systemic-sclerosis-a-pilot-study
#2
Susanna Maddali Bongi, Giovanni Ravenni, Benedetta Ciampi, Angela Del Rosso, Khadija El Aoufy
OBJECTIVE: Foot problems are often present in Systemic Sclerosis (SSc) patients, however studies regarding podiatric problems related to SSc are lacking and there are no data evaluating the foot biomechanical changes. The aim of the present pilot study was to evaluate podiatric problems in an Italian cohort of SSc patients by assessing received podiatric services, foot pain and disability and biomechanical foot deformity. MATERIAL AND METHODS: 25 consecutive SSc patients were enrolled from the Division of Rheumatology, University of Florence...
December 2016: European Journal of Rheumatology
https://www.readbyqxmd.com/read/28129518/body-mass-and-weekly-training-distance-influence-the-pain-and-injuries-experienced-by-runners-using-minimalist-shoes
#3
Joel T Fuller, Dominic Thewlis, Jonathan D Buckley, Nicholas A T Brown, Joseph Hamill, Margarita D Tsiros
BACKGROUND: Minimalist shoes have been popularized as a safe alternative to conventional running shoes. However, a paucity of research is available investigating the longer-term safety of minimalist shoes. PURPOSE: To compare running-related pain and injury between minimalist and conventional shoes in trained runners and to investigate interactions between shoe type, body mass, and weekly training distance. STUDY DESIGN: Randomized clinical trial; Level of evidence, 2...
January 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28095359/gait-deviations-associated-with-plantar-heel-pain-a-systematic-review
#4
REVIEW
Adam Phillips, Shane McClinton
BACKGROUND: Plantar heel pain is a common foot disorder associated with significant pain and gait-related disability. The aim of this systematic review was to identify gait deviations associated with plantar heel pain. METHODS: A systematic review of articles with quantitative gait variables in individuals with plantar heel pain was conducted using the CINAHL, MEDLINE, Scopus, and Embase databases. Methodological quality was assessed using the modified Downs and Black criteria and used along with the number of studies per gait variable to determine level of evidence...
December 24, 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/28063387/effects-of-chronic-ankle-instability-on-kinetics-kinematics-and-muscle-activity-during-walking-and-running-a-systematic-review
#5
REVIEW
Gabriel Moisan, Martin Descarreaux, Vincent Cantin
The aim of this study is to systematically review and appraise studies assessing the effects of chronic ankle instability (CAI) on kinetics, kinematics and muscle activity during walking and running. The primary search was conducted in PubMed, Embase, CINAHL, AMED and SPORTDiscus. Only studies that compared participants with CAI with healthy participants and assessed kinetics, kinematics or muscle activity during walking or running were included. The risk of bias assessment was conducted using a modified version of the Quality Index checklist...
December 29, 2016: Gait & Posture
https://www.readbyqxmd.com/read/28033051/plantar-pressure-during-gait-in-pregnant-women
#6
Jeanne Bertuit, Clara Leyh, Marcel Rooze, Véronique Feipel
BACKGROUND: During pregnancy, physical and hormonal modifications occur. Morphologic alterations of the feet are found. These observations can induce alterations in plantar pressure. This study sought to investigate plantar pressures during gait in the last 4 months of pregnancy and in the postpartum period. A comparison with nulliparous women was conducted to investigate plantar pressure modifications during pregnancy. METHODS: Fifty-eight women in the last 4 months of pregnancy, nine postpartum women, and 23 healthy nonpregnant women (control group) performed gait trials on an electronic walkway at preferred speeds...
November 2016: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/27992250/impact-of-a-long-run-on-injury-related-biomechanics-with-relation-to-weekly-mileage-in-trained-male-runners
#7
Max R Paquette, Daniel A Melcher
The purposes of this study were to compare selected biomechanical variables before and after a long run, and to assess the relationship between weekly running volume and changes in lower limb biomechanics after the run. Twelve trained habitual rearfoot strike male runners ran overground before and after a treadmill long run while kinematic and kinetic data were recorded. Repeated measures analysis of variance and Cohen's d effect sizes were used to compare kinematic and kinetic variables before and after the run...
December 19, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27935426/joint-stiffness-and-running-economy-during-imposed-forefoot-strike-before-and-after-a-long-run-in-rearfoot-strike-runners
#8
Daniel A Melcher, Max R Paquette, Brian K Schilling, Richard J Bloomer
Research has focused on the effects of acute strike pattern modifications on lower extremity joint stiffness and running economy (RE). Strike pattern modifications on running biomechanics have mostly been studied while runners complete short running bouts. This study examined the effects of an imposed forefoot strike (FFS) on RE and ankle and knee joint stiffness before and after a long run in habitual rearfoot strike (RFS) runners. Joint kinetics and RE were collected before and after a long run. Sagittal joint kinetics were computed from kinematic and ground reaction force data that were collected during over-ground running trials in 13 male runners...
December 9, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27904801/midfoot-and-forefoot-involvement-in-lateral-ankle-sprains-and-chronic-ankle-instability-part-1-anatomy-and-biomechanics
#9
John J Fraser, Mark A Feger, Jay Hertel
: The modern human foot is the culmination of more than five million years of evolution. The ankle-foot complex absorbs forces during loading, accommodates uneven surfaces, and acts as a lever for efficient propulsion. The ankle-foot complex has six independent functional segments that should be understood for proper assessment and treatment of foot and ankle injuries: the shank, rearfoot, midfoot, lateral forefoot, and the medial forefoot. The compliance of the individual segments of the foot is dependent on velocity, task, and active and passive coupling mechanisms within each of the foot segments...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27863793/plantar-pressure-asymmetry-and-risk-of-stress-injuries-in-the-foot-of-young-soccer-players
#10
Renato R Azevedo, Emmanuel S da Rocha, Pedro S Franco, Felipe P Carpes
BACKGROUND: Asymmetries in the magnitude of plantar pressure are considered a risk factor for stress fracture of the fifth metatarsal in soccer athletes. OBJECTIVE: To investigate the presence of plantar pressure asymmetries among young soccer athletes. DESIGN: Observational. SETTING: Laboratory. PARTICIPANTS: Thirty young adolescents divided into a soccer player group (n = 15) or a matched control group (n = 15)...
October 24, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/27849289/external-rotation-elastic-bands-at-the-lower-limb-decrease-rearfoot-eversion-during-walking-a-preliminary-proof-of-concept
#11
Thales R Souza, Vanessa L Araújo, Paula L Silva, Viviane O C Carvalhais, Renan A Resende, Sérgio T Fonseca
Background: Reducing rearfoot eversion is a commonly desired effect in clinical practice to prevent or treat musculoskeletal dysfunction. Interventions that pull the lower limb into external rotation may reduce rearfoot eversion. Objective: This study investigated whether the use of external rotation elastic bands, of different levels of stiffness, will decrease rearfoot eversion during walking. We hypothesized that the use of elastic bands would decrease rearfoot eversion and that the greater the band stiffness, the greater the eversion reduction...
November 7, 2016: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/27834504/redistribution-of-mechanical-work-at-the-knee-and-ankle-joints-during-fast-running-in-minimalist-shoes
#12
Joel T Fuller, Jonathan D Buckley, Margarita D Tsiros, Nicholas A T Brown, Dominic Thewlis
CONTEXT: Minimalist shoes have been suggested as a way to alter running biomechanics to improve running performance and reduce injuries. However, to date, researchers have only considered the effect of minimalist shoes at slow running speeds. OBJECTIVE: To determine if runners change foot-strike pattern and alter the distribution of mechanical work at the knee and ankle joints when running at a fast speed in minimalist shoes compared with conventional running shoes...
October 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27821354/variability-of-segment-coordination-using-a-vector-coding-technique-reliability-analysis-for-treadmill-walking-and-running
#13
Jocelyn F Hafer, Katherine A Boyer
Coordination variability (CV) quantifies the variety of movement patterns an individual uses during a task and may provide a measure of the flexibility of that individual's motor system. While there is growing popularity of segment CV as a marker of motor system health or adaptability, it is not known how many strides of data are needed to reliably calculate CV. This study aimed to determine the number of strides needed to reliably calculate CV in treadmill walking and running, and to compare CV between walking and running in a healthy population...
January 2017: Gait & Posture
https://www.readbyqxmd.com/read/27810691/tibial-rotation-in-running-does-rearfoot-adduction-matter
#14
Katina Mira Fischer, Steffen Willwacher, Joseph Hamill, Gert-Peter Brüggemann
OBJECTIVE: To quantify the magnitude of global rearfoot motion, in particular, rearfoot adduction and to investigate its relationship to tibial rotation. DESIGN: One hundred and four participants ran barefoot on an Ethylene Vinyl Acetate (EVA) foam. Global range of motion values for the shank, rearfoot and medial metatarsal segment as well as foot motion within the transverse plane were determined using an optoelectric motion capture system. Relationships between parameters were assessed using partial correlation analysis...
January 2017: Gait & Posture
https://www.readbyqxmd.com/read/27747787/effect-of-forefoot-strike-on-lower-extremity-muscle-activity-and-knee-joint-angle-during-cutting-in-female-team-handball-players
#15
Naruto Yoshida, Shun Kunugi, Sonoko Mashimo, Yoshihiro Okuma, Akihiko Masunari, Shogo Miyazaki, Tatsuya Hisajima, Shumpei Miyakawa
BACKGROUND: The purpose of this study is to examine the effects of different strike forms, during cutting, on knee joint angle and lower limb muscle activity. METHODS: Surface electromyography was used to measure muscle activity in individuals performing cutting manoeuvres involving either rearfoot strikes (RFS) or forefoot strikes (FFS). Three-dimensional motion analysis was used to calculate changes in knee angles, during cutting, and to determine the relationship between muscle activity and knee joint angle...
December 2016: Sports Medicine—Open
https://www.readbyqxmd.com/read/27741056/differences-in-spatio-temporal-parameters-between-trained-runners-and-untrained-participants
#16
Josué Gómez-Molina, Ana Ogueta-Alday, Christopher Stickley, Jesus Camara Tobalina, Jon Cabrejas-Ugartondo, Juan García-López
The aim of this study was to compare the spatio-temporal 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 two groups according to their training experience: Trained (n=10, amateur runners with long distance training experience) and Untrained (n=11, healthy non-trained participants). Anthropometric variables were recorded, and the participants performed both a submaximal (between 9 and 15 km·h) and a graded exercise running test (from 6 km·h until exhaustion) on a treadmill...
October 6, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27684301/reliability-of-a-seven-segment-foot-model-with-medial-and-lateral-midfoot-and-forefoot-segments-during-walking-gait
#17
Stephen C Cobb, Mukta N Joshi, Robin L Pomeroy
In-vitro and invasive in-vivo studies have reported relatively independent motion in the medial and lateral forefoot segments during gait. However, most current surface-based models have not defined medial and lateral forefoot or midfoot segments. The purpose of the current study was to determine the reliability of a 7-segment foot model that includes medial and lateral midfoot and forefoot segments during walking gait. Three-dimensional positions of marker clusters located on the leg and 6 foot segments were tracked as 10 participants completed 5 walking trials...
December 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27630426/effects-of-increasing-physical-activity-on-foot-structure-and-ankle-muscle-strength-in-adults-with-obesity
#18
Xiaoguang Zhao, Takehiko Tsujimoto, Bokun Kim, Yasutomi Katayama, Kyousuke Wakaba, Zhennan Wang, Kiyoji Tanaka
[Purpose] The purpose of this study was to examine the effects of increasing physical activity on foot structure and ankle muscle strength in adults with obesity and to verify whether the rate of change in foot structure is related to that in ankle muscle strength. [Subjects and Methods] Twenty-seven adults with obesity completed a 12-week program in which the intensity of physical activity performed was gradually increased. Physical activity was monitored using a three-axis accelerometer. Foot structure was assessed using a three-dimensional foot scanner, while ankle muscle strength was measured using a dynamometry...
August 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27626955/are-muscle-activation-patterns-altered-during-shod-and-barefoot-running-with-a-forefoot-footfall-pattern
#19
Ulysses Fernandes Ervilha, Luis Mochizuki, Aylton Figueira, Joseph Hamill
This study aimed to investigate the activation of lower limb muscles during barefoot and shod running with forefoot or rearfoot footfall patterns. Nine habitually shod runners were asked to run straight for 20 m at self-selected speed. Ground reaction forces and thigh and shank muscle surface electromyographic (EMG) were recorded. EMG outcomes (EMG intensity [iEMG], latency between muscle activation and ground reaction force, latency between muscle pairs and co-activation index between muscle pairs) were compared across condition (shod and barefoot), running cycle epochs (pre-strike, strike, propulsion) and footfall (rearfoot and forefoot) by ANOVA...
September 14, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27624557/initial-foot-contact-and-related-kinematics-affect-impact-loading-rate-in-running
#20
Bastiaan Breine, Philippe Malcolm, Ine Van Caekenberghe, Pieter Fiers, Edward C Frederick, Dirk De Clercq
This study assessed kinematic differences between different foot strike patterns and their relationship with peak vertical instantaneous loading rate (VILR) of the ground reaction force (GRF). Fifty-two runners ran at 3.2 m · s(-1) while we recorded GRF and lower limb kinematics and determined foot strike pattern: Typical or Atypical rearfoot strike (RFS), midfoot strike (MFS) of forefoot strike (FFS). Typical RFS had longer contact times and a lower leg stiffness than Atypical RFS and MFS. Typical RFS showed a dorsiflexed ankle (7...
September 13, 2016: Journal of Sports Sciences
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