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https://www.readbyqxmd.com/read/29031665/stress-distribution-of-metatarsals-during-forefoot-strike-versus-rearfoot-strike-a-finite-element-study
#1
Shudong Li, Yan Zhang, Yaodong Gu, James Ren
Due to the limitations of experimental approaches, comparison of the internal deformation and stresses of the human man foot between forefoot and rearfoot landing is not fully established. The objective of this work is to develop an effective FE modelling approach to comparatively study the stresses and energy in the foot during forefoot strike (FS) and rearfoot strike (RS). The stress level and rate of stress increase in the Metatarsals are established and the injury risk between these two landing styles is evaluated and discussed...
September 25, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28900572/return-to-running-following-a-knee-disarticulation-amputation-a-case-report
#2
Angela R Diebal-Lee, Robert S Kuenzi, Christopher A Rábago
BACKGROUND AND PURPOSE: The evolution of running-specific prostheses has empowered athletes with lower extremity amputations to run farther and faster than previously thought possible; but running with proper mechanics is still paramount to an injury-free, active lifestyle. The purpose of this case report was to describe the successful alteration of intact limb mechanics from a Rearfoot Striking (RFS) to a Non-Rearfoot Striking (NRFS) pattern in an individual with a knee disarticulation amputation, the associated reduction in Average Vertical Loading Rate (AVLR), and the improvement in functional performance following the intervention...
August 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28900568/can-runners-perceive-changes-in-heel-cushioning-as-the-shoe-ages-with-increased-mileage
#3
Mark W Cornwall, Thomas G McPoil
BACKGROUND: For those runners who utilize footwear and have a rearfoot strike pattern, the durability of the midsole heel region has been shown to deteriorate as shoe mileage increases. PURPOSE: The purpose of this study was threefold: 1) to determine if the runner can self-report changes in heel cushioning properties of the midsole after an extended period of distance running, 2) to determine if force and plantar pressures measured in the heel region of the midsole using a capacitance sensor insole change after running 640 km, and 3) to determine if a durometer could be used clinically to objectively measure changes in the hardness of the material in the heel region of the midsole...
August 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28853317/shoe-drop-reduction-influences-the-lower-limb-biomechanics-of-children-tennis-players-during-an-open-stance-forehand-a-longitudinal-study
#4
Alexis Herbaut, Emilie Simoneau-Buessinger, Franck Barbier, Christophe Gillet, Maxime Roux, Nils GuéGuen, Pascale Chavet
Compared to traditional tennis shoes, using 0-drop shoes was shown to induce an immediate switch from rear- to forefoot strike pattern to perform an open stance tennis forehand for 30% of children tennis players. The purpose of the study was to examine the long-term effects of a gradual reduction in the shoe drop on the biomechanics of children tennis players performing open stance forehands. Thirty children tennis players participated in 2 laboratory biomechanical test sessions (intermediate: +4 months and final: +8 months) after an inclusion visit where they were randomly assigned to control (CON) or experimental (EXP) group...
August 30, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28822329/changes-in-gluteal-muscle-forces-with-alteration-of-footstrike-pattern-during-running
#5
Charles Nathan Vannatta, Thomas W Kernozek, Naghmeh Gheidi
Gait retraining is a common form of treatment for running related injuries. Proximal factors at the hip have been postulated as having a role in the development of running related injuries. How altering footstrike affects hip muscles forces and kinematics has not been described. Thus, we aimed to quantify differences in hip muscle forces and hip kinematics that may occur when healthy runners are instructed to alter their foot strike pattern from their habitual rear-foot strike to a forefoot strike. This may gain insight on the potential etiology and treatment methods of running related lower extremity injury...
October 2017: Gait & Posture
https://www.readbyqxmd.com/read/28812039/three-dimensional-biomechanical-analysis-of-rearfoot-and-forefoot-running
#6
Sebastian Knorz, Felix Kluge, Kolja Gelse, Stefan Schulz-Drost, Thilo Hotfiel, Matthias Lochmann, Björn Eskofier, Sebastian Krinner
BACKGROUND: In the running community, a forefoot strike (FFS) pattern is increasingly preferred compared with a rearfoot strike (RFS) pattern. However, it has not been fully understood which strike pattern may better reduce adverse joint forces within the different joints of the lower extremity. PURPOSE: To analyze the 3-dimensional (3D) stress pattern in the ankle, knee, and hip joint in runners with either a FFS or RFS pattern. STUDY DESIGN: Descriptive laboratory study...
July 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28806710/foot-strike-pattern-in-children-during-shod-unshod-running
#7
Pedro Ángel Latorre Román, Fernando Redondo Balboa, Felipe García Pinillos
The purpose of this study was to determine the foot strike patterns (FSPs) and neutral support (no INV/EVE and no foot rotation) in children, as well as to determine the influence of shod/unshod conditions and sex. A total of 713 children, aged 6 to 16 years, participated in this study (Age=10.28±2.71years, body mass index [BMI]=19.70±3.91kg/m(2), 302 girls and 411 boys). A sagittal and frontal-plane video (240Hz) was recorded using a high-speed camcorder, to record the following variables: rearfoot strike (RFS), midfoot strike (MFS), forefoot strike (FFS), inversion/eversion (INV/EVE) and foot rotation on initial contact...
October 2017: Gait & Posture
https://www.readbyqxmd.com/read/28731978/differences-in-spatiotemporal-parameters-between-trained-runners-and-untrained-participants
#8
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/28728130/superficial-plantar-cutaneous-sensation-does-not-trigger-barefoot-running-adaptations
#9
M A Thompson, K M Hoffman
It has long been proposed that the gait alterations associated with barefoot running are mediated by alterations in sensory feedback, yet there has been no data to support this claim. Thus, the purpose of this study was to examine the role of superficial plantar cutaneous feedback in barefoot and shod running. METHODS: 10 healthy active subjects (6 male, 4 female); mass: 65.2+9.7kg; age: 27+7.1years participated in this study. 10 over-ground running trials were completed in each of the following conditions: barefoot (BF), shod (SHOD), anesthetized barefoot (ANEST BF) and anesthetized shod (ANEST SHOD)...
September 2017: Gait & Posture
https://www.readbyqxmd.com/read/28632060/the-collision-forces-and-lower-extremity-inter-joint-coordination-during-running
#10
Li-I Wang, Chin-Yi Gu, I-Lin Wang, Sheng-Wun Siao, Szu-Ting Chen
The purpose of this study was to compare the lower extremity inter-joint coordination of different collision forces runners during running braking phase. A dynamical system approach was used to analyse the inter-joint coordination parameters. Data were collected with six infra-red cameras and two force plates. According to the impact peak of the vertical ground reaction force, twenty habitually rearfoot-strike runners were categorised into three groups: high collision forces runners (HF group, n = 8), medium collision forces runners (MF group, n = 5), and low collision forces runners (LF group, n = 7)...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28610875/identification-and-risk-estimation-of-movement-strategies-during-cutting-maneuvers
#11
Sina David, Igor Komnik, Markus Peters, Johannes Funken, Wolfgang Potthast
OBJECTIVES: Approximately 70% of anterior cruciate ligament (ACL) injuries occur in non-contact situations during cutting and landing maneuvers. Parameters such as footstrike patterns and trunk orientation were found to influence ACL relevant knee loading, however, the relationship between the whole body movement and injury risk is debated. This study identifies whole body movement strategies that increase injury risk, and provides training recommendations to reduce this risk or enable a save return to sports after injury...
May 25, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28599003/measurement-agreement-between-a-newly-developed-sensing-insole-and-traditional-laboratory-based-method-for-footstrike-pattern-detection-in-runners
#12
Roy T H Cheung, Winko W An, Ivan P H Au, Janet H Zhang, Zoe Y S Chan, Alfred Man, Fannie O Y Lau, Melody K Y Lam, K K Lau, C Y Leung, N W Tsang, Louis K Y Sze, Gilbert W K Lam
This study introduced a novel but simple method to continuously measure footstrike patterns in runners using inexpensive force sensors. Two force sensing resistors were firmly affixed at the heel and second toe of both insoles to collect the time signal of foot contact. A total of 109 healthy young adults (42 males and 67 females) were recruited in this study. They ran on an instrumented treadmill at 0°, +10°, and -10° inclinations and attempted rearfoot, midfoot, and forefoot landings using real time visual biofeedback...
2017: PloS One
https://www.readbyqxmd.com/read/28481686/lower-extremity-joint-loads-in-habitual-rearfoot-and-mid-forefoot-strike-runners-with-normal-and-shortened-stride-lengths
#13
Elizabeth R Boyer, Timothy R Derrick
Our purpose was to compare joint loads between habitual rearfoot (hRF) and habitual mid/forefoot strikers (hFF), rearfoot (RFS) and mid/forefoot strike (FFS) patterns, and shorter stride lengths (SLs). Thirty-eight hRF and hFF ran at their normal SL, 5% and 10% shorter, as well as with the opposite foot strike. Three-dimensional ankle, knee, patellofemoral (PF) and hip contact forces were calculated. Nearly all contact forces decreased with a shorter SL (1.2-14.9% relative to preferred SL). In general, hRF had higher PF (hRF-RFS: 10...
May 8, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28460179/manipulation-of-foot-strike-and-footwear-increases-achilles-tendon-loading-during-running
#14
Hannah Rice, Mubarak Patel
BACKGROUND: The Achilles tendon is the most common site of tendon overuse injury in humans. Running with a forefoot strike pattern and in minimal shoes is a topic of recent interest, yet evidence is currently limited regarding the combined influence of foot strike and footwear on Achilles tendon loading. PURPOSE: To investigate the influence of both foot strike and footwear on Achilles tendon loading in habitual rearfoot strike runners. STUDY DESIGN: Controlled laboratory study...
August 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28417667/immediate-and-short-term-biomechanical-adaptation-of-habitual-barefoot-runners-who-start-shod-running
#15
Ivan P H Au, Fannie O Y Lau, Winko W An, Janet H Zhang, Tony L Chen, Roy T H Cheung
This study investigated the immediate and short-term effects of minimalist shoes (MS) and traditional running shoes (TRS) on vertical loading rates, foot strike pattern and lower limb kinematics in a group of habitual barefoot runners. Twelve habitual barefoot runners were randomly given a pair of MS or TRS and were asked to run with the prescribed shoes for 1 month. Outcome variables were obtained before, immediate after and 1 month after shoe prescription. Average and instantaneous vertical loading rates at the 1-month follow-up were significantly higher than that at the pre-shod session (P < 0...
April 18, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28157573/foot-segmental-mobility-during-subphases-of-running-comparative-study-between-two-striking-patterns
#16
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/27992250/impact-of-a-long-run-on-injury-related-biomechanics-with-relation-to-weekly-mileage-in-trained-male-runners
#17
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...
June 26, 2017: 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
#18
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 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27834504/redistribution-of-mechanical-work-at-the-knee-and-ankle-joints-during-fast-running-in-minimalist-shoes
#19
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/27747787/effect-of-forefoot-strike-on-lower-extremity-muscle-activity-and-knee-joint-angle-during-cutting-in-female-team-handball-players
#20
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
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