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https://www.readbyqxmd.com/read/29149063/estimating-stair-running-performance-using-inertial-sensors
#1
Lauro V Ojeda, Antonia M Zaferiou, Stephen M Cain, Rachel V Vitali, Steven P Davidson, Leia A Stirling, Noel C Perkins
Stair running, both ascending and descending, is a challenging aerobic exercise that many athletes, recreational runners, and soldiers perform during training. Studying biomechanics of stair running over multiple steps has been limited by the practical challenges presented while using optical-based motion tracking systems. We propose using foot-mounted inertial measurement units (IMUs) as a solution as they enable unrestricted motion capture in any environment and without need for external references. In particular, this paper presents methods for estimating foot velocity and trajectory during stair running using foot-mounted IMUs...
November 17, 2017: Sensors
https://www.readbyqxmd.com/read/29134318/the-impact-of-different-peripheral-suture-techniques-on-the-biomechanical-stability-in-flexor-tendon-repair
#2
B Wieskötter, M Herbort, M Langer, M J Raschke, D Wähnert
PURPOSE: Flexor tendon repair consists of circumferential peripheral sutures in combination with core sutures to avoid fraying and reduces the exposure of suture material on tendon surface. The peripheral suture adds up to a tenfold increase of the biomechanical stability compared to the core suture alone. The purpose of our study was to determine the most favourable peripheral repair technique for tendon repair. METHODS: Seventy-two porcine flexor tendons underwent standardized tenotomy and repair using one of the following six methods (n = 12): simple-running (SR), simple-locking (SL), Halsted-mattress (HM), lin-locking (LL), Lembert-mattress (LM), and Silfverskiöld cross-stich (SCS) suture technique...
November 13, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29124286/adjustable-loop-acl-suspension-devices-demonstrate-less-reliability-in-terms-of-reproducibility-and-irreversible-displacement
#3
Sufian S Ahmad, Michael T Hirschmann, Benjamin Voumard, Sandro Kohl, Philippe Zysset, Takura Mukabeta, Dimitrios S Evangelopoulos, Atesch Ateschrang
PURPOSE: The aim of this study was to perform a comprehensive biomechanical examination of frequently applied femoral cortical suspension devices, comparing the properties of both fixed and adjustable fixation mechanisms. It was hypothesized that adjustable loop devices demonstrate less consistent fixation properties with increased variability compared to fixed loop devices. METHODS: Nine frequently applied fixation button types were tested, six adjustable and three rigid loop devices...
November 9, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29114512/the-runsmart-training-program-effect-on-oxygen-consumption-and-lower-extremity-biomechanics-during-running
#4
Jennifer Bogulski, Steven Gonser, Doug Bush, Rachel Bugner, Lindsey Clark, Lisa Farrell, Kristen Swanson, Michael David Ross
As recreational running continues to gain popularity, more individuals are seeking ways to improve running performance. RunSmart is a running intervention program designed to enhance a runner's form. In addition to correcting flaws in a runner's form, RunSmart offers the opportunity for runners to continue a regular regimen while slowly integrating changes in form. The purpose of this case series was twofold: to determine if the RunSmart program coincides with improvements in oxygen consumption (VO2), a variable often associated with better running performance times, and to evaluate the RunSmart program in regard to enhancing gait biomechanics...
August 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29080511/influence-of-outdoor-running-fatigue-and-medial-tibial-stress-syndrome-on-accelerometer-based-loading-and-stability
#5
Kurt H Schütte, Stefan Seerden, Rachel Venter, Benedicte Vanwanseele
Medial tibial stress syndrome (MTSS) is a common overuse running injury with pathomechanics likely to be exaggerated by fatigue. Wearable accelerometry provides a novel alternative to assess biomechanical parameters continuously while running in more ecologically valid settings. The purpose of this study was to determine the influence of outdoor running fatigue and MTSS on both dynamic loading and dynamic stability derived from trunk and tibial accelerometery. Runners with (n=14) and without (n=16) history of MTSS performed an outdoor fatigue run of 3200m...
October 23, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29080303/is-the-mechanical-fatigue-of-bone-influenced-more-by-the-impact-or-active-phase-of-running
#6
Lindsay L Loundagin, Tannin Schmidt, W Brent Edwards
Stress fractures are common overuse injuries amongst runners associated with the mechanical fatigue of bone. Several in vivo biomechanical studies have investigated specific characteristics of the vertical ground reaction force (vGRF) in running and have observed an association between increased loading rate during impact and individuals with a history of stress fracture. The purpose of this study was to examine the fatigue behavior of cortical bone using vGRF-like loading profiles, including those that had been decomposed into their respective impact and active phase components...
October 28, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29074289/gait-biomechanics-of-skipping-are-substantially-different-than-those-of-running
#7
Jessica McDonnell, John D Willson, Kevin A Zwetsloot, Joseph Houmard, Paul DeVita
The inherit injury risk associated with high-impact exercises calls for alternative ways to achieve the benefits of aerobic exercise while minimizing excessive stresses to body tissues. Skipping presents such an alternative, incorporating double support, flight, and single support phases. We used ground reaction forces (GRFs), lower extremity joint torques and powers to compare skipping and running in 20 healthy adults. The two consecutive skipping steps on each limb differed significantly from each other, and from running...
October 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29065279/gait-retraining-for-the-reduction-of-injury-occurrence-in-novice-distance-runners-1-year-follow-up-of-a-randomized-controlled-trial
#8
Zoe Y S Chan, Janet H Zhang, Ivan P H Au, Winko W An, Gary L K Shum, Gabriel Y F Ng, Roy T H Cheung
BACKGROUND: The increasing popularity of distance running has been accompanied by an increase in running-related injuries, such that up to 85% of novice runners incur an injury in a given year. Previous studies have used a gait retraining program to successfully lower impact loading, which has been associated with many running ailments. However, softer footfalls may not necessarily prevent running injury. PURPOSE: To examine vertical loading rates before and after a gait retraining program and assess the effectiveness of the program in reducing the occurrence of running-related injury across a 12-month observation period...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29060776/unsupervised-gait-detection-using-biomechanical-restrictions
#9
Shinji Hotta, Akihiro Inomata, Yuki Sasamoto, Shiho Washizawa, Brian Caulfield
Quantification of human gait with sensors has enormous potential in health and rehabilitation applications. Objective measurement of gait features in the home and community can reveal the true nature of impact of disease on activities of daily living or response to interventions. Previously reported gait event detection methods have achieved good success, yet can produce errors in some irregular gait patterns. In this paper, we propose a novel unsupervised detection of gait events and gait duration by combining two exclusive processes: (i) exploration of gait event candidates based on iterative running of existing methods with changing parameters and, (ii) selection of the candidate which satisfies gait-specific biomechanical restrictions (e...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060407/influence-of-pre-processing-in-the-extraction-of-muscle-synergies-during-human-locomotion
#10
D Rimini, V Agostini, S Rosati, C Castagneri, G Balestra, M Knaflitz
The extraction of muscle synergies in human locomotion may be biased by the kind of pre-processing applied to electromyographic (EMG) data. The aim of this contribution is to analyze the differences in the muscle synergies extracted using a standard pre-processing procedure and a new procedure. The new procedure is based on the selection of the muscle's principal activations (necessary actuations of the muscle to accomplish its specific biomechanical task during gait), discarding secondary activations (with an auxiliary function in motor control)...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059198/optimal-stride-frequencies-in-running-at-different-speeds
#11
Ben T van Oeveren, Cornelis J de Ruiter, Peter J Beek, Jaap H van Dieën
During running at a constant speed, the optimal stride frequency (SF) can be derived from the u-shaped relationship between SF and heart rate (HR). Changing SF towards the optimum of this relationship is beneficial for energy expenditure and may positively change biomechanics of running. In the current study, the effects of speed on the optimal SF and the nature of the u-shaped relation were empirically tested using Generalized Estimating Equations. To this end, HR was recorded from twelve healthy (4 males, 8 females) inexperienced runners, who completed runs at three speeds...
2017: PloS One
https://www.readbyqxmd.com/read/29054746/the-influence-of-cadence-and-shoes-on-patellofemoral-joint-kinetics-in-runners-with-patellofemoral-pain
#12
Jason Bonacci, Michelle Hall, Aaron Fox, Natalie Saunders, Tristan Shipsides, Bill Vicenzino
OBJECTIVES: To determine the effect of a combination of a minimalist shoe and increased cadence on measures of patellofemoral joint loading during running in individuals with patellofemoral pain. DESIGN: Within-participant repeated measures with four conditions presented in random order: (1) control shoe at preferred cadence; (2) control shoe with +10% cadence; (3) minimalist shoe at preferred cadence; (4) minimalist shoe with +10% cadence. METHODS: Fifteen recreational runners with patellofemoral pain ran on an instrumented treadmill while three-dimensional motion capture data were acquired...
October 6, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29051334/case-studies-in-physiology-the-biomechanics-of-the-fastest-sprinter-with-a-unilateral-transtibial-amputation
#13
Owen N Beck, Alena Marie Grabowski
People have debated whether athletes with transtibial amputations should compete with non-amputees in track events despite insufficient information regarding how the use of running-specific prostheses affects athletic performance. Thus, we sought to quantify the spatio-temporal variables, ground reaction forces, and spring-mass mechanics of the fastest athlete with a unilateral transtibial amputation using an RSP to reveal how he adapts his biomechanics to achieve elite running speeds. Accordingly, we measured ground reaction forces during treadmill running trials spanning 2...
October 19, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29035979/effect-of-a-commercially-available-footwear-insole-on-biomechanical-variables-associated-with-common-running-injuries
#14
Ryan T Lewinson, Darren J Stefanyshyn
OBJECTIVE: To determine whether Dr. Scholl's Active Series (DSAS) footwear insoles alter biomechanical variables associated with running injuries. DESIGN: Randomized, controlled experiment. SETTING: Sport medicine and biomechanics gait analysis laboratory. PARTICIPANTS: Fifteen healthy adults. INTERVENTIONS: The control condition was the participant's own athletic footwear. The experimental condition was the participant's own athletic footwear plus a DSAS insole...
October 10, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29016393/biomechanical-implications-of-training-volume-and-intensity-in-aging-runners
#15
Max R Paquette, Paul DeVita, D S Blaise Williams
Running speed is slower in middle-aged compared to younger runners due to reduced ankle but not hip and knee kinetic output. Running-specific training helps attenuate age-related declines in measures of endurance, muscle strength and gait speed. Considering the adaptability of the human body in response to imposed stresses, maintaining training volume and intensity may play a role in modifying running biomechanics in middle-aged runners. PURPOSE: To compare running biomechanics between young and middle-aged runners when controlling for the confounding effects of training volume and intensity...
October 9, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28994758/using-gold-standard-gait-analysis-methods-to-assess-experience-effects-on-lower-limb-mechanics-during-moderate-high-heeled-jogging-and-running
#16
Yan Zhang, Meizi Wang, Jan Awrejcewicz, Gusztáv Fekete, Feng Ren, Yaodong Gu
A limited number of studies have explored lower-limb biomechanics during high-heeled jogging and running, and most studies have failed to clarify the wearing experience of subjects. This protocol describes the differences in lower-limb kinematics and ground reaction force (GRF) between experienced wearers (EW) and inexperienced wearers (IEW) during moderate high-heeled jogging and running. A three-dimensional (3D) motion analysis system with a configured force platform was used to synchronously capture lower-limb joint movements and GRF...
September 14, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28990118/efficacy-of-long-pulse-nd-yag-laser-versus-fractional-er-yag-laser-in-the-treatment-of-hand-wrinkles
#17
Reza M Robati, Elmira Asadi, Anoosh Shafiee, Nastaran Namazi, Atefeh Talebi
There are different modalities for hand rejuvenation. Fractional Er:YAG laser and long pulse Nd:YAG laser were introduced for treating hand wrinkles. We plan to compare fractional Er:YAG laser and long pulse Nd:YAG laser in a randomized controlled double-blind design with multiple sessions and larger sample size in comparison with previous studies. Thirty-three participants with hand wrinkles entered this study. They were randomly allocated to undergo three monthly laser treatments on each hand, one with a fractional Er:YAG laser and the other with a long pulse Nd:YAG laser...
October 8, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28972820/injuries-in-cricket
#18
Dinshaw N Pardiwala, Nandan N Rao, Ankit V Varshney
CONTEXT: Cricket is a popular global sport that requires a combination of physical fitness, skill, and strategy. Although a noncontact sport, overuse and impact injuries are common since players engage in a wide range of physical activities, including running, throwing, batting, bowling, catching, and diving. Significant or match time-loss injuries are defined as those that either prevent a player from being fully available for selection in a major match, or during a major match, cause a player to be unable to bat, bowl, or keep wicket when required by either the rules or the team's captain...
September 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28970792/parkinson-disease-detection-from-speech-articulation-neuromechanics
#19
Pedro Gómez-Vilda, Jiri Mekyska, José M Ferrández, Daniel Palacios-Alonso, Andrés Gómez-Rodellar, Victoria Rodellar-Biarge, Zoltan Galaz, Zdenek Smekal, Ilona Eliasova, Milena Kostalova, Irena Rektorova
Aim: The research described is intended to give a description of articulation dynamics as a correlate of the kinematic behavior of the jaw-tongue biomechanical system, encoded as a probability distribution of an absolute joint velocity. This distribution may be used in detecting and grading speech from patients affected by neurodegenerative illnesses, as Parkinson Disease. Hypothesis: The work hypothesis is that the probability density function of the absolute joint velocity includes information on the stability of phonation when applied to sustained vowels, as well as on fluency if applied to connected speech...
2017: Frontiers in Neuroinformatics
https://www.readbyqxmd.com/read/28968139/biomechanical-comparisons-among-fastball-slider-curveball-and-changeup-pitch-types-and-between-balls-and-strikes-in-professional-baseball-pitchers
#20
Rafael F Escamilla, Glenn S Fleisig, Dave Groeschner, Ken Akizuki
BACKGROUND: In professional baseball pitchers, pitching biomechanics have not been examined for the slider, and the only known study for the curveball and changeup examined limited kinetics. Moreover, no known studies have investigated pitching biomechanics between strikes and balls. Purpose/Hypothesis: The purpose was to compare pitching biomechanics in professional baseball pitchers among the fastball, slider, curveball, and changeup and between balls and strikes. It was hypothesized that pitching kinematics and kinetics would be similar among the slider, fastball, and curveball; shoulder and elbow forces and torques would be significantly lower in the changeup; and pitching biomechanics would be similar between balls and strikes...
September 1, 2017: American Journal of Sports Medicine
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