keyword
MENU ▼
Read by QxMD icon Read
search

Rearfoot

keyword
https://www.readbyqxmd.com/read/27904801/midfoot-and-forefoot-involvement-in-lateral-ankle-sprains-and-chronic-ankle-instability-part-1-anatomy-and-biomechanics
#1
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
#2
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
#3
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
#4
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...
November 11, 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
#5
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...
November 2, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27810691/tibial-rotation-in-running-does-rearfoot-adduction-matter
#6
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/27747787/effect-of-forefoot-strike-on-lower-extremity-muscle-activity-and-knee-joint-angle-during-cutting-in-female-team-handball-players
#7
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
#8
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
#9
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 seven 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 six foot segments were tracked as ten participants completed five walking trials...
September 29, 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
#10
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
#11
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
#12
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
https://www.readbyqxmd.com/read/27617625/different-running-patterns-along-the-aerial-terrestrial-continuum-can-result-in-similar-running-economy
#13
Thibault Lussiana, Cyrille Gindre, Kim Hébert-Losier, Yoshimasa Sagawa, Philippe Gimenez, Laurent Mourot
PURPOSE: There is no unique or 'ideal' running pattern that is the most economical for all runners. Classifying the global running patterns of individuals into two categories (aerial and terrestrial) using the Volodalen® method could permit a better understanding of the relationship between running economy (RE) and biomechanics. The main purpose was to compare RE between aerial and terrestrial runners. METHODS: Two coaches classified 58 runners into aerial (n=29) or terrestrial (n=29) running patterns on the basis of visual observations...
September 6, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27594087/running-quietly-reduces-ground-reaction-force-and-vertical-loading-rate-and-alters-foot-strike-technique
#14
Xuan Phan, Tiffany L Grisbrook, Kevin Wernli, Sarah M Stearne, Paul Davey, Leo Ng
This study aimed to determine if a quantifiable relationship exists between the peak sound amplitude and peak vertical ground reaction force (vGRF) and vertical loading rate during running. It also investigated whether differences in peak sound amplitude, contact time, lower limb kinematics, kinetics and foot strike technique existed when participants were verbally instructed to run quietly compared to their normal running. A total of 26 males completed running trials for two sound conditions: normal running and quiet running...
September 3, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27593384/relationship-between-foot-strike-pattern-running-speed-and-footwear-condition-in-recreational-distance-runners
#15
Roy T H Cheung, Rodney Y L Wong, Tim K W Chung, R T Choi, Wendy W Y Leung, Diana H Y Shek
Compared to competitive runners, recreational runners appear to be more prone to injuries, which have been associated with foot strike patterns. Surprisingly, only few studies had examined the foot strike patterns outside laboratories. Therefore, this study compared the foot strike patterns in recreational runners at outdoor tracks with previously reported data. We also investigated the relationship between foot strike pattern, speed, and footwear in this cohort. Among 434 recreational runners analysed, 89...
September 4, 2016: Sports Biomechanics
https://www.readbyqxmd.com/read/27592823/ground-reaction-forces-during-steeplechase-hurdling-and-waterjumps
#16
Shalaya Kipp, Paolo Taboga, Rodger Kram
Athletes in the 3,000 m steeplechase track and field event negotiate unmovable hurdles and waterjumps. Ground reaction forces (GRF) in the steeplechase were quantified to elucidate injury risks / mechanisms and to inform coaches. Five male and five female steeplechasers participated. GRF were measured during treadmill running, and using specially mounted force platforms, during hurdle and waterjump takeoffs and landings at 5.54 m/s (males) or 5.00 m/s (females). Results are presented as: male mean ± SD / female mean ± SD...
September 5, 2016: Sports Biomechanics
https://www.readbyqxmd.com/read/27580450/the-dead-spot-phenomenon-in-prosthetic-gait-quantified-with-an-analysis-of-center-of-pressure-progression-and-its-velocity-in-the-sagittal-plane
#17
Tyler D Klenow, Jason T Kahle, M Jason Highsmith
BACKGROUND: The "dead spot" phenomenon in prosthetics is a disruption in forward progression observed in the rearfoot of passive prosthetic foot-ankle systems which results in a compensatory and inefficient gait pattern by amputees. A metric to quantify the dead spot as a kinetic event has not yet been introduced. The present study implements a three-part metric to evaluate the dead spot in terms of time, magnitude, and total area using center of pressure velocity and a novel threshold value calculation...
October 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/27571390/kinetic-changes-during-a-six-week-minimal-footwear-and-gait-retraining-intervention-in-runners
#18
Joe P Warne, Barry P Smyth, John O'C Fagan, Michelle E Hone, Chris Richter, Alan M Nevill, Kieran A Moran, Giles D Warrington
An evaluation of a six-week Combined minimal footwear transition and gait-retraining combination vs. gait retraining only on impact characteristics and leg stiffness. Twenty-four trained male runners were randomly assigned to either (1) Minimalist footwear transition Combined with gait-retraining over a six-week period ("Combined" group; n = 12) examined in both footwear, or (2) a gait-retraining group only with no minimalist footwear exposure ("Control"; n = 12). Participants were assessed for loading rate, impact peak, vertical, knee and ankle stiffness, and foot-strike using 3D and kinetic analysis...
August 29, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27555883/the-influence-of-insoles-with-a-peroneal-pressure-point-on-the-electromyographic-activity-of-tibialis-anterior-and-peroneus-longus-during-gait
#19
Oliver Ludwig, Jens Kelm, Michael Fröhlich
BACKGROUND: Peroneus longus acts as a foot evertor and pronator, thus ensuring stability of the talocrural joint by curbing inversion movement of the rearfoot. Increased activation of the peroneus longus muscle in the stance phase could have a stabilising effect on the ankle joint. This study aimed to determine whether the activity of the peroneus longus muscle could be increased by the targeted use of a specially formed lateral pressure element in a customised orthopaedic insole. METHODS: This was a laboratory-based study that utilised a randomised crossover design...
2016: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/27509479/mild-leg-length-discrepancy-affects-lower-limbs-pelvis-and-trunk-biomechanics-of-individuals-with-knee-osteoarthritis-during-gait
#20
Renan A Resende, Renata N Kirkwood, Kevin J Deluzio, Amy M Morton, Sérgio T Fonseca
BACKGROUND: Leg length discrepancy greater than 1cm increases odds of progressive knee osteoarthritis in the shorter limb. METHODS: Biomechanical data of 15 knee osteoarthritis participants were collected while they walked under two conditions: (1) control - wearing thick sandals; (2) short limb - wearing a thin sandal on the osteoarthritic limb and a thick sandal on the contralateral limb. The thick and thin sandals had 1.45cm of thickness difference. The knee osteoarthritis limb was analyzed for both conditions...
October 2016: Clinical Biomechanics
keyword
keyword
39366
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"