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https://www.readbyqxmd.com/read/27888786/the-assessment-of-three-dimensional-foot-pronation-using-a-principal-component-analysis-method-in-the-stance-phase-of-running
#1
Mohammad Rabiei, Mansour Eslami, Afshin Fayyaz Movaghar
Foot pronation has not been quantified dynamically in three planes of movement in an in-vivo study. The aims of this study were to determine foot pronation through using Principal Component Analysis (PCA) method and to compare it among barefoot, shod and shod with 6° lateral wedge during the stance phase of running. In this method, three-dimension of foot movements were measured and each of these components represents a percentage of foot pronation. These components were derived based on eigenvalues and vectors of covariance matrix of primary variables...
September 20, 2016: Foot
https://www.readbyqxmd.com/read/27865154/a-narrow-bimalleolar-width-is-a-risk-factor-for-ankle-inversion-injury-in-male-military-recruits-a-prospective-study
#2
Hannah Rice, Michael Nunns, Carol House, Joanne Fallowfield, Adrian Allsopp, Sharon Dixon
BACKGROUND: Ankle inversion injuries are one of the most common and burdensome injuries in athletic populations. Research that prospectively identifies characteristics associated with this injury is lacking. This prospective study compared baseline anthropometric and biomechanical gait characteristics of military recruits who sustained an ankle inversion injury during training, with those who remained injury-free. METHODS: Bilateral plantar pressure and three-dimensional lower limb kinematics were recorded in 1065 male, injury-free military recruits, during barefoot running...
November 10, 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/27810691/tibial-rotation-in-running-does-rearfoot-adduction-matter
#3
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...
October 25, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27803620/a-comparison-of-stride-length-and-lower-extremity-kinematics-during-barefoot-and-shod-running-in-well-trained-distance-runners
#4
Peter Francis, James Ledingham, Sarah Clarke, D J Collins, Philip Jakeman
Stride length, hip, knee and ankle angles were compared during barefoot and shod running on a treadmill at two speeds. Nine well-trained (1500m time: 3min:59.80s ± 14.7 s) male (22 ±3 years; 73 ±9 kg; 1.79 ±0.4 m) middle distance (800 m - 5,000 m) runners performed 2 minutes of running at 3.05 m·s(-1) and 4.72 m·s(-1) on an treadmill. This approach allowed continuous measurement of lower extremity kinematic data and calculation of stride length. Statistical analysis using a 2X2 factorial ANOVA revealed speed to have a main effect on stride length and hip angle and footwear to have a main effect on hip angle...
September 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27801744/long-term-effects-of-habitual-barefoot-running-and-walking-a-systematic-review
#5
Karsten Hollander, Christoph Heidt, Babette van der Zwaard, Klaus-Michael Braumann, Astrid Zech
INTRODUCTION: Barefoot locomotion is widely believed to be beneficial for motor development and biomechanics but are implied to be responsible for foot pathologies and running-related injuries. While most of available studies focused on acute effects of barefoot running and walking little is known regarding the effects of long-term barefoot vs. shod locomotion. The purpose of this study was to systematically review the literature to evaluate current evidence of habitual barefoot (HB) vs...
October 31, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27770687/the-effects-of-squatting-footwear-on-three-dimensional-lower-limb-and-spine-kinetics
#6
Daniel J Southwell, Shane A Petersen, Tyson A C Beach, Ryan B Graham
Altering footwear worn during performance of the barbell back squat has been shown to change motion patterns, but it is not completely understood how this affects biomechanical loading demands. The primary objective was to compare lower back and extremity net joint moments in 24 experienced weightlifters (12M, 12F) who performed 80% one-repetition maximum back squats under three different footwear conditions (barefoot, running shoes, weightlifting shoes). Results showed that there was a significant main effect of footwear condition on the knee extension moment (p=0...
December 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/27744106/high-compared-to-low-arched-athletes-exhibit-smaller-knee-abduction-moments-in-walking-and-running
#7
Douglas W Powell, Samantha Andrews, Cris Stickley, D S Blaise Williams
: High- (HA) and low-arched athletes (LA) experience distinct injury patterns. These injuries are the result of the interaction of structure and biomechanics. A suggested mechanism of patellofemoral pain pertains to frontal plane knee moments which may be exaggerated in LA athletes. We hypothesize that LA athletes will exhibit greater peak knee abduction moments than high-arched athletes. METHODS: Twenty healthy female recreational athletes (10HA and 10LA) performed five over-ground barefoot walking and five barefoot running trials at a self-selected velocity while three-dimensional kinematics and ground reaction forces were recorded...
December 2016: Human Movement Science
https://www.readbyqxmd.com/read/27626955/are-muscle-activation-patterns-altered-during-shod-and-barefoot-running-with-a-forefoot-footfall-pattern
#8
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/27607302/a-new-footwear-technology-to-promote-non-heelstrike-landing-and-enhance-running-performance-fact-or-fad
#9
Janet H Zhang, Aislinn J C McPhail, Winko W An, Waqar M Naqvi, Daniel L H Chan, Ivan P H Au, Alvin T W Luk, Tony L Chen, Roy T H Cheung
This study sought to compare the kinetics and kinematics data in a group of habitual shod runners when running in traditional running shoes and newly designed minimalist shoes with lug platform. This novel footwear design claims to simulate barefoot running and reduce energy loss during impact. We compared footstrike angle (FSA), vertical average (VALR) and instantaneous (VILR) loading rates, energy loss and initial vertical stiffness between two shoe conditions. Runners demonstrated a decreased FSA while running in minimalist shoes with lug platform than traditional shoes (P = 0...
September 8, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27594919/the-effects-of-being-habitually-barefoot-on-foot-mechanics-and-motor-performance-in-children-and-adolescents-aged-6-18-years-study-protocol-for-a-multicenter-cross-sectional-study-barefoot-life-project
#10
Karsten Hollander, Babette C van der Zwaard, Johanna Elsabe de Villiers, Klaus-Michael Braumann, Ranel Venter, Astrid Zech
BACKGROUND: Barefoot locomotion has evoked an increasing scientific interest with a controversial debate about benefits and limitations of barefoot and simulated barefoot walking and running. While most current knowledge comes from cross sectional laboratory studies, the evolutionary perspective suggests the importance of investigating the long-term effects. Observing habitually barefoot populations could fill the current gap of missing high quality longitudinal studies. Therefore, the study described in this design paper aims to investigate the effects of being habitually barefoot on foot mechanics and motor performance of children and adolescents...
2016: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/27362583/primary-mechanical-factors-contributing-to-foot-eversion-moment-during-the-stance-phase-of-running
#11
Norio Tsujimoto, Hiroyuki Nunome, Yasuo Ikegami
Rearfoot external eversion moments due to ground reaction forces (GRF) during running have been suggested to contribute to overuse running injuries. This study aimed to identify primary factors inducing these rearfoot external eversion moments. Fourteen healthy men ran barefoot across a force plate embedded in the middle of 30-m runway with 3.30 ± 0.17 m · s(-1). Total rearfoot external eversion/inversion moments (Mtot) were broken down into the component Mxy due to medio-lateral GRF (Fxy) and the component Mz due to vertical GRF (Fz)...
June 30, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27362213/electromyographical-analysis-of-one-mile-run-in-barefoot-minimalist-zero-drop-and-standard-running-shoes-3847-board-286-june-4-8-00-am-9-30-am
#12
Michael Bohne
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27361839/the-acute-effect-of-exposure-to-barefoot-running-on-vo2peak-fatigue-and-time-to-exhaustion-in-recreational-runners-3270-board-335-june-3-3-30-pm-5-00-pm
#13
Matthew Miltenberger, Anton Pecha, Robert Dowden, Tyler Keshel, Shawn Munford, Emily Sauers
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27346636/initiating-running-barefoot-effects-on-muscle-activation-and-impact-accelerations-in-habitually-rearfoot-shod-runners
#14
Angel Gabriel Lucas-Cuevas, José Ignacio Priego Quesada, José Vicente Giménez, Inma Aparicio, Irene Jimenez-Perez, Pedro Pérez-Soriano
Runners tend to shift from a rearfoot to a forefoot strike pattern when running barefoot. However, it is unclear how the first attempts at running barefoot affect habitually rearfoot shod runners. Due to the inconsistency of their recently adopted barefoot technique, a number of new barefoot-related running injuries are emerging among novice barefoot runners. The aim of this study was therefore to analyse the influence of three running conditions (natural barefoot [BF], barefoot with a forced rearfoot strike [BRS], and shod [SH]) on muscle activity and impact accelerations in habitually rearfoot shod runners...
November 2016: European Journal of Sport Science
https://www.readbyqxmd.com/read/27307512/shoes-alter-the-spring-like-function-of-the-human-foot-during-running
#15
Luke A Kelly, Glen A Lichtwark, Dominic J Farris, Andrew Cresswell
The capacity to store and return energy in legs and feet that behave like springs is crucial to human running economy. Recent comparisons of shod and barefoot running have led to suggestions that modern running shoes may actually impede leg and foot-spring function by reducing the contributions from the leg and foot musculature. Here we examined the effect of running shoes on foot longitudinal arch (LA) motion and activation of the intrinsic foot muscles. Participants ran on a force-instrumented treadmill with and without running shoes...
June 2016: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/27274672/the-influence-of-a-bout-of-exertion-on-novice-barefoot-running-dynamics
#16
Rami Hashish, Sachithra D Samarawickrame, Lucinda Baker, George J Salem
Barefoot, forefoot strike (FFS) running has recently risen in popularity. Relative to shod, rear-foot strike (RFS) running, employing a FFS is associated with heightened triceps surae muscle activation and ankle mechanical demand. Novice to this pattern, it is plausible that habitually shod RFS runners exhibit fatigue to the triceps surae when acutely transitioning to barefoot running, thereby limiting their ability to attenuate impact. Therefore, the purpose was to determine how habitually shod RFS runners respond to an exertion bout of barefoot running, operationally defined as a barefoot run 20% of mean daily running distance...
June 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27241856/side-sloped-surfaces-substantially-affect-lower-limb-running-kinematics
#17
Mohsen Damavandi, Mansour Eslami, David J Pearsall
Running on side-sloped surfaces is a common obstacle in the environment; however, how and to what extent the lower extremity kinematics adapt is not well known. The purpose of this study was to determine the effects of side-sloped surfaces on three-dimensional kinematics of hip, knee, and ankle during stance phase of running. Ten healthy adult males ran barefoot along an inclinable runway in level (0°) and side-sloped (10° up-slope and down-slope inclinations, respectively) configurations. Right hip, knee, and ankle angles along with their time of occurrence were analysed using repeated measures MANOVA...
May 31, 2016: Sports Biomechanics
https://www.readbyqxmd.com/read/27166325/an-exploratory-study-investigating-the-effects-of-barefoot-running-on-working-memory
#18
Ross G Alloway, Tracy Packiam Alloway, Peter M Magyari, Shelley Floyd
The aim of the present study was to compare the potential cognitive benefits of running barefoot compared to shod. Young adults (N = 72, M age = 24.4 years, SD = 5.5) ran both barefoot and shod on a running track while stepping on targets (poker chips) and when not stepping on targets. The main finding was that participants performed better on a working memory test when running barefoot compared to shod, but only when they had to step on targets. These results supported the idea that additional attention is needed when running barefoot to avoid stepping on objects that could potentially injure the foot...
April 2016: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/27150199/investigating-biomechanical-function-of-toes-through-external-manipulation-integrating-analysis
#19
Qichang Mei, Justin Fernandez, Patria Hume, Yaodong Gu
PURPOSE: This study was aimed to investigate the function of toes while running through comparing bound toes by external- manipulation with natural separate toes by evaluating kinematics and plantar pressure analysis. METHODS: Seven habitually barefoot male runners participated in the running test under toes binding and non-binding conditions, and Vicon and Novel insole plantar pressure measurement were conducted synchronously to collect kinematics and foot loading...
2016: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/27131192/does-transition-shoe-promote-an-intermediate-biomechanical-condition-compared-to-running-in-conventional-shoe-and-in-reduced-protection-condition
#20
Ana Paula da Silva Azevedo, Bruno Mezêncio, Raísa Valvassori, Luis Mochizuki, Alberto Carlos Amadio, Júlio Cerca Serrão
This study evaluated if running in a "transition shoe" commercially available results in intermediate mechanical load upon lower extremities compared to conventional shoe and minimalist shoe/barefoot. Kinematic and kinetic parameters while running in different shoe conditions were compared. Fourteen runners (12 men, 2 women; age=28.4±7.3 years), inexperienced in minimalist shoes and barefoot running, ran on an instrumented treadmill within four experimental conditions (conventional shoe - CS, transition shoe - TrS, minimalist shoe - MS, and barefoot - BF)...
May 2016: Gait & Posture
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