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https://www.readbyqxmd.com/read/27918678/gait-asymmetry-during-400-to-1000-m-high-intensity-track-running-in-relation-to-injury-history
#1
Rahel Ammann, Wolfgang Taube, Thomas Wyss
PURPOSE: The aim of the present study was to quantify gait asymmetry in well-trained runners, with and without previous injuries during interval training sessions incorporating different distances. METHODS: Twelve well-trained runners participated in eight high-intensity interval training sessions on a synthetic track over a 4-week period. The training consisted of 10 × 400 m, 8 × 600 m, 7 × 800 m, and 6 × 1000 m running. Using an inertial measurement unit, the ground contact time (GCT) of every step was recorded...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918673/predictive-indicators-of-overuse-injuries-in-adolescent-endurance-athletes
#2
Daniel Martínez-Silván, Jaime Díaz-Ocejo, Andrew Murray
PURPOSE: To analyse the influence of training exposure and the utility of self-report questionnaires on predicting overuse injuries in adolescent endurance athletes. METHODS: 5 adolescent male endurance athletes (15.7 ± 1.4 yr) from a full-time sports academy answered 2 questionnaires (Recovery Cue; RC-q & Oslo Sports Trauma Research questionnaire; OSTRC-q) on a weekly basis for one season (37 wks) in order to detect (1) signs of overtraining and under-recovery (RC-q) and (2) early symptoms of lower limb injuries (OSTRC-q)...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27917543/is-motivation-for-marathon-a-protective-factor-or-a-risk-factor-of-injury
#3
A Chalabaev, R Radel, I Ben Mahmoud, B Massiera, T Deroche, F d'Arripe-Longueville
This research investigated whether and how self-determined motivation predicts perceived susceptibility to injury during competition (marathon). Two correlational studies including 378 (Study 1) and 339 (Study 2) marathon runners were conducted. Participants filled out a questionnaire the day before the race measuring self-determined motivation, perceived susceptibilities to marathon-related injury and to keep running through pain, and control variables. Study 1 showed that self-determined motivation was negatively related to perceived susceptibility to marathon-related injury...
December 5, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/27912252/impact-of-stretching-on-the-performance-and-injury-risk-of-long-distance-runners
#4
Claire Baxter, Lars R Mc Naughton, Andy Sparks, Lynda Norton, David Bentley
Stretching, either prior to exercise or at the end, or both, is typically carried out by all individuals undertaking sporting activity whether they be elite or recreational athletes. The many forms of stretching available to the athlete, either passive or active, have long been thought to improve performance, decrease injury and generally be advantageous to the athlete. This review examines the current state of the literature and evaluates what athletes can and should do with respect to this controversial topic...
December 2, 2016: Research in Sports Medicine
https://www.readbyqxmd.com/read/27855536/comparison-of-estimates-of-achilles-tendon-loading-from-inverse-dynamics-and-inverse-dynamics-based-static-optimisation-during-running
#5
Thomas Kernozek, Naghmeh Gheidi, Robert Ragan
Tendon stress may be one of the important risk factors for running-related tendon injury. Several methods have been used to estimate Achilles tendon (AT) loading during a human performance such as inverse dynamics (ID) and inverse dynamics-based static optimisation (IDSO). Our purpose was to examine differences between ID and IDSO estimates of AT loading during running. Kinematic data were captured simultaneously with kinetic data. Imaging of the AT cross-sectional area was performed with ultrasound for 17 healthy runners (height: 170...
November 18, 2016: 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
#6
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/27813684/altered-vertical-ground-reaction-forces-in-participants-with-chronic-ankle-instability-while-running
#7
John Bigouette, Janet Simon, Kathy Liu, Carrie L Docherty
CONTEXT: Altered gait kinetics may increase the risk of long-term injuries in participants with chronic ankle instability (CAI). Vertical ground reaction forces (vGRFs) can provide insight into how body loading is altered. OBJECTIVE: To compare the components of vGRFs while running in participants with or without CAI. DESIGN: Cohort study. SETTING: University biomechanics laboratory. PATIENTS OR OTHER PARTICIPANTS: Twenty-four experienced, college-aged runners...
September 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27801744/long-term-effects-of-habitual-barefoot-running-and-walking-a-systematic-review
#8
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/27800702/independent-effects-of-step-length-and-foot-strike-pattern-on-tibiofemoral-joint-forces-during-running
#9
Collin D Bowersock, Richard W Willy, Paul DeVita, John D Willson
The purpose of this study was to examine the effects of step length and foot strike pattern along with their interaction on tibiofemoral joint (TFJ) and medial compartment TFJ kinetics during running. Nineteen participants ran with a rear foot strike pattern at their preferred speed using a short (-10%), preferred, and long (+10%) step length. These step length conditions were then repeated using a forefoot strike pattern. Regardless of foot strike pattern, a 10% shorter step length resulted in decreased peak contact force, force impulse per step, force impulse per kilometre, and average loading rate at the TFJ and medial compartment, while a 10% increased step length had the opposite effects (all P < 0...
November 1, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27796913/self-administration-of-medicines-and-dietary-supplements-among-female-amateur-runners-a-cross-sectional-analysis
#10
Médéa Locquet, Charlotte Beaudart, Robert Larbuisson, Victoria Leclercq, Fanny Buckinx, Jean-François Kaux, Jean-Yves Reginster, Olivier Bruyère
INTRODUCTION: Self-administration of medicines or dietary supplements without any physician's advice is a widespread behavior and appears to be more frequently practiced by women. Moreover, reasons to self-administer products are often pains and injuries especially among athletes who might also use remedies to improve physical performance. The objective of this study was thus to assess the prevalence of self-administration of medicines and dietary supplements as well as its determinants among female amateur runners...
October 31, 2016: Advances in Therapy
https://www.readbyqxmd.com/read/27785775/risk-and-protective-factors-for-middle-and-long-distance-running-related-injury
#11
REVIEW
Adam Hulme, Rasmus Oestergaard Nielsen, Toomas Timpka, Evert Verhagen, Caroline Finch
BACKGROUND: Despite a rapidly growing body of research, a systematic evidence compilation of the risk and protective factors for middle- and long-distance running-related injury (RRI) was lacking. OBJECTIVES: Our objective was to compile the evidence about modifiable and non-modifiable training-related and behavioral risk and protective factors for middle- and long-distance RRI. METHODS: We searched five databases (PubMed, CINAHL, MEDLINE, SPORTDiscus, and PsycINFO) for the dates 1 January 1970 to 31 December 2015, inclusive, for original peer-reviewed articles...
October 27, 2016: Sports Medicine
https://www.readbyqxmd.com/read/27776927/the-energetic-cost-of-gait-retraining-a-pilot-study-of-the-acute-effect
#12
Andrew D Townshend, Melinda M Franettovich Smith, Mark W Creaby
OBJECTIVE: To investigate the acute effect of gait retraining aimed at reducing tibial peak positive acceleration (PPA) on energetic cost (VO2). DESIGN: Intervention with a pre/post-test design. SETTING: University biomechanics laboratory. PARTICIPANTS: 12 healthy male runners (23.4 ± 5.3 years, 179.7 ± 4.3 cm, 75.6 ± 9.2 kg). MAIN OUTCOME MEASURES: Tibial PPA and oxygen consumption (VO2) were measured after a five minute baseline run and at the end of a gait retraining session aimed at minimizing tibial PPA...
August 21, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/27770784/effects-of-two-neuromuscular-training-programs-on-running-biomechanics-with-load-carriage-a-study-protocol-for-a-randomised-controlled-trial
#13
Bernard X W Liew, Susan Morris, Justin W L Keogh, Brendyn Appleby, Kevin Netto
BACKGROUND: In recent years, athletes have ventured into ultra-endurance and adventure racing events, which tests their ability to race, navigate, and survive. These events often require race participants to carry some form of load, to bear equipment for navigation and survival purposes. Previous studies have reported specific alterations in biomechanics when running with load which potentially influence running performance and injury risk. We hypothesize that a biomechanically informed neuromuscular training program would optimize running mechanics during load carriage to a greater extent than a generic strength training program...
October 22, 2016: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/27762613/effect-of-vibram-fivefingers-minimalist-shoes-on-the-abductor-hallucis-muscle
#14
Nicholas A Campitelli, Scott A Spencer, Kaitlyn Bernhard, Kristen Heard, Alan Kidon
BACKGROUND: This study investigated the effect of Vibram FiveFingers Bikila minimalist shoes on intrinsic foot musculature. We hypothesized that a gradual transition into minimalist shoes will increase the thickness of the abductor hallucis muscle. METHODS: Forty-one individuals were divided into four groups: control (traditional shod) (n = 9), restricted walking in Vibram FiveFingers (n = 11), running in Vibram FiveFingers (n = 10), and unlimited walking in Vibram FiveFingers (n = 11)...
September 2, 2016: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/27755283/hip-biomechanics-are-altered-in-male-runners-with-achilles-tendinopathy
#15
Mark W Creaby, Conor Honeywill, Melinda M Franettovich Smith, Anthony G Schache, Kay M Crossley
PURPOSE: Achilles tendinopathy (AT) is a prevalent injury in running sports. Understanding the biomechanical factors associated with AT will assist in its management and prevention. The purpose of this study was to compare hip and ankle kinematics and kinetics in runners with and without AT. METHODS: Fourteen male runners with AT and eleven healthy male runners (CTRL) ran over-ground whilst lower-limb joint motion and ground reaction force data were synchronously captured...
October 17, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27747772/the-impact-of-gastrointestinal-symptoms-and-dermatological-injuries-on-nutritional-intake-and-hydration-status-during-ultramarathon-events
#16
Ricardo J S Costa, Rhiannon Snipe, Vera Camões-Costa, Volker Scheer, Andrew Murray
BACKGROUND: Debilitating gastrointestinal symptoms (GIS) and dermatological injuries (DI) are common during and after endurance events and have been linked to performance decrements, event withdrawal, and issues requiring medical attention. The study aimed to determine whether GIS and DI affect food and fluid intake, and nutritional and hydration status, of ultramarathon runners during multi-stage (MSUM) and 24-h continuous (24 h) ultramarathons. METHODS: Ad libitum food and fluid intakes of ultramarathon runners (MSUM n = 54; 24 h n = 22) were recorded throughout both events and analysed by dietary analysis software...
December 2016: Sports Medicine—Open
https://www.readbyqxmd.com/read/27741056/differences-in-spatio-temporal-parameters-between-trained-runners-and-untrained-participants
#17
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/27727360/association-between-interleukin-6-174-g-c-promoter-gene-polymorphism-and-runners-responses-to-the-dietary-ingestion-of-antioxidant-supplementation-based-on-pequi-caryocar-brasiliense-camb-oil-a-before-after-study
#18
Ana Luisa Miranda-Vilela, Ieler Ferreira Ribeiro, Cesar Koppe Grisolia
Exercise is a double-edged sword: when practiced in moderation, it increases the expression of antioxidant enzymes, but when practiced strenuously it causes oxidative stress and cell damage. In this context, polymorphisms in the interleukin (IL)-6 gene should be investigated better because they can influence performance, at least in exercise that generates oxidative stress and leads to muscular injuries with consequent inflammation. In this work, we investigated the influence of IL-6 -174 G/C polymorphism on tissue damage and inflammation markers, lipid peroxidation, hemogram and lipid profile of runners before and after ingestion of 400 mg of pequi oil in capsules supplied daily for 14 consecutive days...
October 2016: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/27705065/the-use-of-recovery-strategies-among-participants-of-the-bupa-great-north-run-a-cross-sectional-survey
#19
Sarah Henderson, Tina Smith, Jenny Alexanders, Thomas Shaw, Lois Smith, Alan Nevill, Anna Anderson
OBJECTIVE: To investigate half marathon runners' frequency of use of recovery strategies, perceptions regarding the most beneficial recovery strategy and reasons for using recovery strategies. DESIGN: Cross-sectional survey. PARTICIPANTS: 186 participants of the 13.1 mile BUPA Great North Run 2013. METHODS: A questionnaire was developed which required participants to indicate how frequently they used twelve different recovery strategies, identify which recovery strategy they believed to be most beneficial and rank six reasons for using recovery strategies in order of importance...
September 26, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27693442/hip-abductor-strength-and-lower-extremity-running-related-injury-in-distance-runners-a-systematic-review
#20
Matthew D Mucha, Wade Caldwell, Emily L Schlueter, Carly Walters, Amy Hassen
OBJECTIVES: Determine the association between hip abduction strength and lower extremity running related injury in distance runners. DESIGN: Systematic review. METHODS: Prospective longitudinal and cross sectional studies that quantified hip abduction strength and provided diagnosis of running related injury in distance runners were included and assessed for quality. Effect size was calculated for between group differences in hip abduction strength...
September 20, 2016: Journal of Science and Medicine in Sport
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