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Fatigue kinematics

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https://www.readbyqxmd.com/read/28650739/the-effect-of-high-intensity-exercise-and-anticipation-on-trunk-and-lower-limb-biomechanics-during-a-crossover-cutting-manoeuvre
#1
Enda F Whyte, Chris Richter, Siobhan O'connor, Kieran A Moran
We investigated the effects of high intensity, intermittent exercise (HIIP) and anticipation on trunk, pelvic and lower limb biomechanics during a crossover cutting manoeuvre. Twenty-eight male, varsity athletes performed crossover cutting manoeuvres in anticipated and unanticipated conditions pre- and post-HIIP. Kinematic and kinetic variables were captured using a motion analysis system. Statistical parametric mapping (repeated-measures ANOVA) was used to identify differences in biomechanical patterns. Results demonstrated that both unanticipation and fatigue (HIIP) altered the biomechanics of the crossover cutting manoeuvre, whereas no interactions effects were observed...
June 26, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28626309/does-the-weakening-of-intrinsic-foot-muscles-cause-the-decrease-of-medial-longitudinal-arch-height
#2
Kazunori Okamura, Shusaku Kanai, Sadaaki Oki, Satoshi Tanaka, Naohisa Hirata, Yoshiaki Sakamura, Norikatsu Idemoto, Hiroki Wada, Akira Otsuka
[Purpose] There are no reliable evidences that the weakening of intrinsic foot muscles causes the decrease of the medial longitudinal arch (MLA) height. The purpose of this study was to confirm whether the fatigue of intrinsic foot muscles decrease the MLA height during standing and gait using 3D motion analysis system. [Subjects and Methods] Twenty healthy male subjects participated in this study. Foot kinematics was measured using an Oxford Foot Model before and after fatigue-inducing exercises of the abductor hallucis and flexor hallucis brevis muscles...
June 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28618309/exertion-and-pain-do-not-alter-coordination-variability-in-runners-with-iliotibial-band-syndrome
#3
Jocelyn F Hafer, Allison M Brown, Katherine A Boyer
BACKGROUND: Iliotibial band syndrome is a common overuse running injury which results in altered mechanics. While injuries alter discrete mechanics, they may also cause a change in coordination variability, the stride-to-stride organization of runners' movement patterns. Uninjured and injured runners may experience a change in coordination variability during a run to exertion due to fatigue, pain, or a combination of these factors. The aim of the current study was to determine if runners with iliotibial band syndrome and uninjured runners display different segment coordination variability across the course of a run to exertion...
June 8, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28616033/exercise-induced-muscle-fatigue-in-the-unaffected-knee-joint-and-its-influence-on-postural-control-and-lower-limb-kinematics-in-stroke-patients
#4
Sun Wook Park, Sung Min Son, Na Kyung Lee
This study aimed to investigate the effects of exercise-induced muscle fatigue in the unaffected knee joint on postural control and kinematic changes in stroke patients. Forty participants (20 stroke patients, 20 age-matched healthy participants) were recruited. To induce fatigue, maximum voluntary isometric contractions were performed in the unaffected knee joint in a Leg Extension Rehab exercise machine using the pneumatic resistance. We measured static and dynamic balance and lower-limb kinematics during gait...
May 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28608245/obesity-and-obesity-shape-markedly-influence-spine-biomechanics-a-subject-specific-risk-assessment-model
#5
Farshid Ghezelbash, Aboulfazl Shirazi-Adl, André Plamondon, Navid Arjmand, Mohamad Parnianpour
Underlying mechanisms of obesity-related back pain remain unexplored. Thus, we aim to determine the effect of obesity and its shapes on the spinal loads and the associated risks of injury. Obesity shapes were initially constructed by principal component analysis based on datasets on 5852 obese individuals. Spinal loads, cycles to vertebral failure and trunk stability margin were estimated in a subject-specific trunk model taking account of personalized musculature, passive ligamentous spine, obesity shapes, segmental weights, spine kinematics and bone mineral density...
June 12, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28587986/angle-ply-biomaterial-scaffold-for-annulus-fibrosus-repair-replicates-native-tissue-mechanical-properties-restores-spinal-kinematics-and-supports-cell-viability
#6
Ryan Borem, Allison Madeline, Joshua Walters, Henry Mayo, Sanjitpal Gill, Jeremy Mercuri
Annulus fibrosus (AF) damage commonly occurs due to intervertebral disc (IVD) degeneration/herniation. The dynamic mechanical role of the AF is essential for proper IVD function and thus it is imperative that biomaterials developed to repair the AF withstand the mechanical rigors of the native tissue. Furthermore, these biomaterials must resist accelerated degradation within the proteolytic environment of degenerate IVDs while supporting integration with host tissue. We have previously reported a novel approach for developing collagen-based, multi-laminate AF repair patches (AFRPs) that mimic the angle-ply architecture and basic tensile properties of the human AF...
June 3, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28587934/ankle-and-knee-biomechanics-during-normal-walking-following-ankle-plantarflexor-fatigue
#7
Michael A Hunt, Gillian L Hatfield
The purpose of this study was to investigate the immediate effects of unilateral ankle plantarflexor fatigue on bilateral knee and ankle biomechanics during gait. Lower leg kinematics, kinetics, and muscle activation were assessed before and after an ankle plantarflexor fatiguing protocol in 31 healthy individuals. Fatigue (defined as >10% reduction in maximal isometric ankle plantarflexor torque production and a downward shift in the median power frequency of both heads of the gastrocnemius muscle of the fatigued limb) was achieved in 18 individuals, and only their data were used for analysis purposes...
August 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28582418/an-in-vivo-comparison-study-in-goats-for-a-novel-motion-preserving-cervical-joint-system
#8
Jie Qin, Chenguang Zhao, Dong Wang, Bo Zhao, Jun Dong, Haopeng Li, Rongxia Sang, Shuang Wang, Jiao Fu, Rangrang Kong, Xijing He
Cervical degenerative disease is one of the most common spinal disorders worldwide, especially in older people. Anterior cervical corpectomy and fusion (ACCF) is a useful method for the surgical treatment of multi-level cervical degenerative disease. Anterior cervical disc replacement (ACDR) is considered as an alternative surgical method. However, both methods have drawbacks, particularly the neck motion decrease observed after arthrodesis, and arthroplasty should only be performed on patients presenting with cervical disc disease but without any vertebral body disease...
2017: PloS One
https://www.readbyqxmd.com/read/28575923/the-effect-of-a-simulated-soccer-match-on-anterior-cruciate-ligament-injury-risk-factors
#9
Matthew Wright, Paul Chesterton, Mark Wijnbergen, Adrian O'Rourke, Tom Macpherson
To investigate the effect of within match fatigue on knee kinematics and jump kinetics in girls' soccer players, a quasi-experiment time series design was employed collecting data before, after and at 15-min intervals during a 90-min simulated soccer match. 15 girl players (age 13.1±1.4 years) performed a counter movement jump and a single-leg drop jump. Mean concentric force and flight time to contraction time ratio were derived from the counter movement jump. Knee valgus and flexion angles were calculated during the single-leg drop from 3-dimensional motion capture...
June 2, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28536868/caffeine-increases-the-velocity-of-rapid-eye-movements-in-unfatigued-humans
#10
Charlotte J W Connell, Benjamin Thompson, Jason Turuwhenua, Robert F Hess, Nicholas Gant
BACKGROUND: Caffeine is a widely used dietary stimulant that can reverse the effects of fatigue on cognitive, motor and oculomotor function. However, few studies have examined the effect of caffeine on the oculomotor system when homeostasis has not been disrupted by physical fatigue. This study examined the influence of a moderate dose of caffeine on oculomotor control and visual perception in participants who were not fatigued. METHODS: Within a placebo-controlled crossover design, 13 healthy adults ingested caffeine (5 mg·kg(-1) body mass) and were tested over 3 h...
May 24, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28528004/potential-contributions-of-skeletal-muscle-contractile-dysfunction-to-altered-biomechanics-in-obesity
#11
REVIEW
Lance M Bollinger
Obesity alters whole body kinematics and joint kinetics during activities of daily living which are thought to contribute to increased risk of musculoskeletal injury, development of lower extremity joint osteoarthritis (OA), and physical disability. To date, it has widely been accepted that excess adipose tissue mass is the major driver of biomechanical alterations in obesity. However, it is well established that obesity is a systemic disease affecting numerous, if not all, organ systems of the body. Indeed, obesity elicits numerous adaptations within skeletal muscle, including alterations in muscle structure (ex...
July 2017: Gait & Posture
https://www.readbyqxmd.com/read/28502408/combined-effect-of-low-back-muscle-fatigue-and-passive-tissue-elongation-on-the-flexion-relaxation-response
#12
Sangeun Jin, Gary A Mirka
Previous literature has documented the alterations in the flexion-relaxation response of the lumbar extensor musculature to passive tissue elongation (PTE) and muscle fatigue (MF). There is no study, however, that has explored this response as a function of the combined effect of both PTE and MF, which is often seen in occupational settings. Twelve participants performed three experimental protocols on three different days to achieve (1) PTE, (2) MF and (3) PTE&MF (combined). Trunk kinematics and muscle activities were monitored to assess the effects of these protocols on the peak lumbar flexion angle and the lumbar angle of the flexion-relaxation of the trunk extensor muscles...
September 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28496411/calf-compression-sleeves-change-biomechanics-but-not-performance-and-physiological-responses-in-trail-running
#13
Hugo A Kerhervé, Pierre Samozino, Fabrice Descombe, Matthieu Pinay, Guillaume Y Millet, Marion Pasqualini, Thomas Rupp
Introduction: The aim of this study was to determine whether calf compression sleeves (CS) affects physiological and biomechanical parameters, exercise performance, and perceived sensations of muscle fatigue, pain and soreness during prolonged (~2 h 30 min) outdoor trail running. Methods: Fourteen healthy trained males took part in a randomized, cross-over study consisting in two identical 24-km trail running sessions (each including one bout of running at constant rate on moderately flat terrain, and one period of all-out running on hilly terrain) wearing either degressive CS (23 ± 2 mmHg) or control sleeves (CON, <4 mmHg)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28461229/electromyographic-and-kinematic-analysis-of-trunk-and-limb-muscles-during-a-holding-task-in-individuals-with-chronic-low-back-pain-and-healthy-controls
#14
Júlia Jubany, Michel Marina, Rosa Angulo-Barroso
BACKGROUND: Chronic low back pain (CLBP) affects a large proportion of the population and has been associated with different muscle dysfunctions. However, there is no consensus regarding muscle electromyography and kinematic patterns during fatiguing tasks. OBJECTIVE: To examine whether trunk and limb muscle fatigability and activation patterns of individuals suffering CLBP differ from those of healthy participants during a holding task. DESIGN: Cross-sectional study...
April 29, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28452866/effects-of-dopamine-and-norepinephrine-on-exercise-induced-oculomotor-fatigue
#15
Charlotte J W Connell, Benjamin Thompson, Jason Turuwhenua, Alexa Srzich, Nicholas Gant
INTRODUCTION: Fatigue-induced impairments in the control of eye movements are detectable via reduced eye movement velocity following a bout of prolonged, strenuous exercise. Slower eye movements caused by neural fatigue within the oculomotor system can be prevented by caffeine and upregulation of central catecholamines may be responsible for this effect. This study explored the individual contribution of dopamine and norepinephrine to fatigue-related impairments in oculomotor control...
April 28, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28445742/beyond-the-bereitschaftspotential-action-preparation-behind-cognitive-functions
#16
REVIEW
F Di Russo, M Berchicci, C Bozzacchi, R L Perri, S Pitzalis, D Spinelli
Research on preparatory brain processes taking place before acting shows unexpected connections with cognitive processing. From 50 years, we know that motor-related brain activity can be measured by electrocortical recordings 1-3s before voluntary actions. This readiness potential has been associated with increasing excitably of premotor and motor areas and directly linked to the kinematic of the upcoming action. Now we know that the mere motor preparation is only one function of a more complex preparatory activity...
April 23, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28437130/lower-limb-and-trunk-biomechanics-after-fatigue-in-competitive-female-irish-dancers
#17
Catherine Y Wild, Avril Grealish, Diana Hopper
CONTEXT:   Because of the increasing popularity of participation in Irish dance, the incidence of lower limb injuries is high among this competitive population. OBJECTIVE:   To investigate the effects of fatigue on the peak lower limb and trunk angles as well as the peak lower limb joint forces and moments of competitive female Irish dancers during the performance of a dance-specific single-limb landing. DESIGN:   Cross-sectional study...
April 24, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28356640/fatigue-influences-lower-extremity-angular-velocities-during-a-single-leg-drop-vertical-jump
#18
Akihiro Tamura, Kiyokazu Akasaka, Takahiro Otsudo, Junya Shiozawa, Yuka Toda, Kaori Yamada
[Purpose] Fatigue alters lower extremity landing strategies and decreases the ability to attenuate impact during landing. The purpose of this study was to reveal the influence of fatigue on dynamic alignment and joint angular velocities in the lower extremities during a single leg landing. [Subjects and Methods] The 34 female college students were randomly assigned to either the fatigue or control group. The fatigue group performed single-leg drop vertical jumps before, and after, the fatigue protocol, which was performed using a bike ergometer...
March 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28323218/the-postural-control-can-be-optimized-by-the-first-movement-initiation-condition-encountered-when-submitted-to-muscle-fatigue
#19
Florian Monjo, Nicolas Forestier
We investigated whether and how the movement initiation condition (IC) encountered during the early movements performed following focal muscle fatigue affects the postural control of discrete ballistic movements. For this purpose, subjects performed shoulder flexions in a standing posture at maximal velocity under two movement IC, i.e., in self-paced conditions and submitted to a Stroop-like task in which participants had to trigger fast shoulder flexions at the presentation of incongruent colors. Shoulder flexion kinematics, surface muscle activity of focal and postural muscles as well as center-of-pressure kinematics were recorded...
March 18, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28298066/effect-of-fatigue-protocols-on-lower-limb-neuromuscular-function-and-implications-for-anterior-cruciate-ligament-injury-prevention-training
#20
Sue D Barber-Westin, Frank R Noyes
BACKGROUND: Approximately two-thirds of anterior cruciate ligament (ACL) tears are sustained during noncontact situations when an athlete is cutting, pivoting, decelerating, or landing from a jump. Some investigators have postulated that fatigue may result in deleterious alterations in lower limb biomechanics during these activities that could increase the risk of noncontact ACL injuries. However, prior studies have noted a wide variation in fatigue protocols, athletic tasks studied, and effects of fatigue on lower limb kinetics and kinematics...
March 1, 2017: American Journal of Sports Medicine
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