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https://www.readbyqxmd.com/read/28513880/unstable-rocker-shoes-promote-recovery-from-marathon-induced-muscle-damage-in-novice-runners
#1
Kento Nakagawa, Takayuki Inami, Takahisa Yonezu, Yuta Kenmotsu, Takaya Narita, Yasuo Kawakami, Kazuyuki Kanosue
We recently reported that wearing unstable rocker shoes (Masai Barefoot Technology: MBT) may enhance recovery from marathon race induced fatigue. However, this earlier study only utilized a questionnaire. In the present study, we evaluated MBT utilizing objective physiological measures of recovery from marathon induced muscle damages. Twenty-five university student novice runners were divided into two groups. After running a full marathon, one group wore MBT shoes (MBT group), and the control group (CON) wore ordinary shoes daily for one week following the race...
May 17, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28504066/the-association-of-recreational-and-competitive-running-with-hip-and-knee-osteoarthritis-a-systematic-review-and-meta-analysis
#2
Eduard Alentorn-Geli, Kristian Samuelsson, Volker Musahl, Cynthia L Green, Mohit Bhandari, Jón Karlsson
Study Design Systematic review and meta-analysis. Background Running is a healthy and popular activity worldwide, but data regarding its association with osteoarthritis (OA) are conflicting. Objectives To evaluate the association of hip and knee OA with running and to explore the influence of running intensity on this association. Methods PubMed, EMBASE and Cochrane Library databases were used to identify studies investigating the occurrence of OA of the hip and/or knee among runners. Studies comparing this occurrence between runners and controls (sedentary, non-running individuals) were meta-analyzed...
May 13, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28481686/lower-extremity-joint-loads-in-habitual-rearfoot-and-mid-forefoot-strike-runners-with-normal-and-shortened-stride-lengths
#3
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/28476901/is-combining-gait-retraining-or-an-exercise-programme-with-education-better-than-education-alone-in-treating-runners-with-patellofemoral-pain-a-randomised-clinical-trial
#4
Jean-Francois Esculier, Laurent Julien Bouyer, Blaise Dubois, Pierre Fremont, Lynne Moore, Bradford McFadyen, Jean-Sébastien Roy
DESIGN: Single-blind randomised clinical trial. OBJECTIVE: To compare the effects of three 8-week rehabilitation programmes on symptoms and functional limitations of runners with patellofemoral pain (PFP). METHODS: Sixty-nine runners with PFP were randomly assigned to one of three intervention groups: (1) education on symptoms management and training modifications (education); (2) exercise programme in addition to education (exercises); (3) gait retraining in addition to education (gait retraining)...
May 5, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28442185/modified-frailty-index-is-an-effective-risk-assessment-tool-in-primary-total-knee-arthroplasty
#5
Robert P Runner, Jaime L Bellamy, CatPhuong Cathy L Vu, Greg A Erens, Mara L Schenker, George N Guild
BACKGROUND: "Frailty" is a marker of physiological decline of multiple organ systems, and the frailty index identifies patients who are more susceptible to postoperative complications. The purpose of this study is to validate the modified frailty index (MFI) as a predictor of postoperative complications, reoperations, and readmissions in patients who underwent primary total knee arthroplasty (TKA). METHODS: The American College of Surgeons National Surgical Quality Improvement Program database from 2005 to 2014 was queried by the Current Procedural Terminology code for primary TKA (27447)...
March 29, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28417667/immediate-and-short-term-biomechanical-adaptation-of-habitual-barefoot-runners-who-start-shod-running
#6
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/28406358/bone-health-in-elite-kenyan-runners
#7
Nicholas Tam, Jordan Santos-Concejero, Ross Tucker, Robert P Lamberts, Lisa K Micklesfield
Impact loading in athletes participating in various sports has been positively associated with increased bone mineral density (BMD), but this has not been investigated in elite Kenyan runners. Body composition and site-specific BMD measures quantified with dual x-ray absorptiometry were measured in 15 elite male Kenyan runners and 23 apparently healthy South African males of different ethnicities. Training load and biomechanical variables associated with impact loading, such as joint stiffness, were determined in the elite Kenyan runners...
April 13, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28388232/increasing-and-decreasing-pain-causes-acute-responses-of-strength-and-running-mechanics-in-patellofemoral-pain
#8
David M Bazett-Jones, Wendy Huddleston, Stephen Cobb, Kristian O'Connor, Jennifer E Earl-Boehm
CONTEXT:   Patellofemoral pain (PFP) is typically exacerbated by repetitive activities that load the patellofemoral joint, such as running. Understanding the mediating effects of changes in pain in individuals with PFP might inform injury progression, rehabilitation, or both. OBJECTIVE:   To investigate the effects of changing pain on muscular strength and running biomechanics in those with PFP. DESIGN:   Crossover study. SETTING:   University research laboratory...
April 7, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28367686/biomechanical-metabolic-and-cardiopulmonary-responses-of-masters-recreational-runners-during-running-at-different-speeds
#9
Hallie Hahn, Kevin R Vincent, Daniel C Herman, Cong Chen, Laura Ann Zdziarski, Christine Morgan, Heather K Vincent
This study tested interactions between age and running speed on biomechanics, metabolic responses and cardiopulmonary responses. Three-hundred participants ran at preferred and standardized speeds. Age group (younger, masters [≥40 years]) by speed (self-selected 8.8 km/h, 11.2 km/h and 13.6 km/h) interactions were tested on main outcomes of sagittal kinematic, temporal spatial, metabolic and cardiopulmonary parameters. At all speeds, angular displacements of the ankle, pelvis and knee were less in masters than younger runners (Hedges g effect size range = 0...
April 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/28366438/measuring-joint-kinematics-of-treadmill-walking-and-running-comparison-between-an-inertial-sensor-based-system-and-a-camera-based-system
#10
Corina Nüesch, Elena Roos, Geert Pagenstert, Annegret Mündermann
Inertial sensor systems are becoming increasingly popular for gait analysis because their use is simple and time efficient. This study aimed to compare joint kinematics measured by the inertial sensor system RehaGait® with those of an optoelectronic system (Vicon®) for treadmill walking and running. Additionally, the test re-test repeatability of kinematic waveforms and discrete parameters for the RehaGait® was investigated. Twenty healthy runners participated in this study. Inertial sensors and reflective markers (PlugIn Gait) were attached according to respective guidelines...
March 21, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28365220/adaptation-of-running-pattern-to-the-drop-of-standard-cushioned-shoes-a-randomised-controlled-trial-with-a-6-month-follow-up
#11
Laurent Malisoux, Paul Gette, Nicolas Chambon, Axel Urhausen, Daniel Theisen
OBJECTIVES: While several cross-sectional studies have investigated the acute effects of shoe drop on running biomechanics, the long-term consequences are currently unknown. This study aimed to investigate if the drop of standard cushioned shoes induces specific adaptations in running technique over a six-month period in leisure-time runners. DESIGN: Double-blinded randomised controlled trial. METHODS: The participants (n=59) received a pair of shoes with a heel-to-toe drop of 10mm (D10), 6mm (D6) or 0mm (D0) and were followed-up regarding running training over 6 months or 500km, whichever came first...
March 18, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28348529/sport-specific-capacity-to-use-elastic-energy-in-the-patellar-and-achilles-tendons-of-elite-athletes
#12
Hans-Peter Wiesinger, Florian Rieder, Alexander Kösters, Erich Müller, Olivier R Seynnes
Introduction: During running and jumping activities, elastic energy is utilized to enhance muscle mechanical output and efficiency. However, training-induced variations in tendon spring-like properties remain under-investigated. The present work extends earlier findings on sport-specific profiles of tendon stiffness and cross-sectional area to examine whether years of distinct loading patterns are reflected by tendons' ability to store and return energy. Methods:Ultrasound scans were performed to examine the morphological features of knee extensor and plantar flexor muscle-tendon units in elite ski jumpers, distance runners, water polo players, and sedentary controls...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28325673/lower-limb-dynamics-and-clinical-outcomes-for-habitually-shod-runners-who-transition-to-barefoot-running
#13
Rami Hashish, Sachithra D Samarawickrame, Susan Sigward, Stanley P Azen, George J Salem
OBJECTIVES: Recent investigations have revealed lower vertical loading rates and knee energy absorption amongst experienced barefoot runners relative to those who rear-foot strike (RFS). Although this has led to an adoption of barefoot running amongst many recreational shoe runners, recent investigations indicate that the experienced barefoot pattern is not immediately realized. Therefore, the purpose this investigation was to quantify changes in lower-extremity dynamics and clinical outcomes measures for habitually shod runners who perform a transition to barefoot running...
December 10, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28322115/lower-extremity-kinematics-of-curve-sprinting-displayed-by-runners-using-a-transtibial-prosthesis
#14
Yumeng Li, Kathy J Simpson, Lee Nolan, Marilyn Miller, Benjamin Johnson
The purpose of the study was to determine if the kinematics exhibited by skilled runners wearing a unilateral, transtibial prosthesis during the curve section of a 200-m sprint race were influenced by interaction of limb-type (prosthetic limb (PROS-L) vs. nonprosthetic limb (NONPROS-L)) and curve-side (inside and outside limb relative to the centre of the curve). Step kinematics, toe clearance and knee and hip flexion/extension, hip ab/adduction for one stride of each limb were generated from video of 13 males running the curve during an international 200 m transtibial-classified competition...
March 21, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28303754/effects-of-running-experience-on-coordination-and-its-variability-in-runners
#15
Pablo Floría, Alberto Sánchez-Sixto, Reed Ferber, Andrew J Harrison
The purpose of this study was to examine the differences in coordination variability in running gait between trained runners and non-runners using continuous relative phase (CRP) analysis. Lower extremity kinematic data were collected for 22 participants during the stance phase. The participants were assigned to either a runner or non-runner group based on running volume training. Segment coordination and coordination variability were calculated for selected hip-knee and knee-ankle couplings. Independent t-tests and magnitude-based inferences were used to compare the 2 groups...
March 17, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28277405/the-preferred-movement-path-paradigm-influence-of-running-shoes-on-joint-movement
#16
Benno M Nigg, Jordyn Vienneau, Aimée C Smith, Matthieu B Trudeau, Maurice Mohr, Sandro R Nigg
PURPOSE: (a) to quantify differences in lower extremity joint kinematics for groups of runners subjected to different running footwear conditions, and (b) to quantify differences in lower extremity joint kinematics on an individual basis for runners subjected to different running footwear conditions. METHODS: Three-dimensional ankle and knee joint kinematics were collected for 35 heel-toe runners when wearing three different running shoes and when running barefoot...
March 8, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28276912/soreness-related-changes-in-three-dimensional-running-biomechanics-following-eccentric-knee-extensor-exercise
#17
Max R Paquette, Shelby A Peel, Brian K Schilling, Dan A Melcher, Richard J Bloomer
Runners often experience delayed onset muscle soreness (DOMS), especially of the knee extensors, following prolonged running. Sagittal knee joint biomechanics are altered in the presence of knee extensor DOMS but it is unclear how muscle soreness affects lower limb biomechanics in other planes of motion. The purpose of this study was to assess the effects of knee extensor DOMS on three-dimensional (3D) lower limb biomechanics during running. Thirty-three healthy men (25.8 ± 6.8 years; 84.1 ± 9.2 kg; 1...
February 22, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28275003/inverse-dynamic-modelling-of-jumping-in-the-red-legged-running-frog-kassina-maculata
#18
Laura B Porro, Amber J Collings, Enrico A Eberhard, Kyle P Chadwick, Christopher T Richards
Although the red-legged running frog Kassina maculata is secondarily a walker/runner, it retains the capacity for multiple locomotor modes, including jumping at a wide range of angles (nearly 70°). Using simultaneous hind limb kinematics and single-foot ground reaction forces, we performed inverse dynamics analyses to calculate moment arms and torques about the hind limb joints during jumping at different angles in K. maculata. We show that forward thrust is generated primarily at the hip and ankle, while body elevation is primarily driven by the ankle...
March 8, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28263283/running-technique-is-an-important-component-of-running-economy-and-performance
#19
Jonathan P Folland, Sam J Allen, Matthew I Black, Joseph C Handsaker, Stephanie E Forrester
Despite an intuitive relationship between technique and both running economy (RE) and performance, and the diverse techniques employed by runners to achieve forward locomotion, the objective importance of overall technique and the key components therein remain to be elucidated. PURPOSE: To determine the relationship between individual and combined kinematic measures of technique with both RE and performance. METHODS: Ninety-seven endurance runners (47 female) of diverse competitive standards performed a discontinuous protocol of incremental treadmill running (4 min stages, 1 km...
March 3, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28253053/kinematic-gait-patterns-in-competitive-and-recreational-runners
#20
Christian A Clermont, Sean T Osis, Angkoon Phinyomark, Reed Ferber
Certain homogeneous running subgroups demonstrate distinct kinematic patterns in running; however, the running mechanics of competitive and recreational runners are not well understood. Therefore, the purpose of this study was to determine whether we could separate and classify competitive and recreational runners according to gait kinematics using multivariate analyses and a machine learning approach. Participants were allocated to the 'competitive' (n=20) or 'recreational' group (n=15) based on age, gender, and recent race performance...
March 2, 2017: Journal of Applied Biomechanics
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