Read by QxMD icon Read

Muscular balance

Eric Leroux, Stéphanie Leroux, Frédéric Maton, Xavier Ravalec, Olivier Sorel
OBJECTIVES: The present study aimed to assess the influence of dental occlusion on body posture and the competitive performance of young elite rowers. METHOD: Dental occlusion disturbance devices were used to simulate dental malocclusions. We assessed the influence of malocclusion on the body balance, paravertebral muscle contraction symmetry, and muscular power of young elite rowers. A nonparametric permutation test for repeated measures ANOVA, a Cochran's Q test for paired data and a paired Student's t-test were used in order to statistically evaluate the influence of artificial occlusal disturbance on each factor...
November 29, 2018: Clinics
Bhawana Sharma, Rajesh Dabur
BACKGROUND: Metabolic pathways perturbations lead to skeletal muscular atrophy in the cachexia and sarcopenia due to increased catabolism. Pro-inflammatory cytokines induce the catabolic pathways that impair the muscle integrity and function. Hence, this review primarily concentrates on the effects of pro-inflammatory cytokines in regulation of skeletal muscle metabolism. OBJECTIVE: This review will discuss role of pro-inflammatory cytokines in skeletal muscles during muscle wasting conditions...
November 28, 2018: Current Medicinal Chemistry
Saad Alabdulkarim, Maury A Nussbaum
We compared different passive exoskeletal designs in terms of physical demands (maximum acceptable frequency = MAF, perceived discomfort, and muscular loading) and quality in a simulated overhead drilling task, and the moderating influence of tool mass (∼2 and ∼5 kg). Three distinct designs were used: full-body and upper-body exoskeletons with attached mechanical arms; and an upper-body exoskeleton providing primarily shoulder support. Participants (n = 16, gender-balanced) simulated drilling for 15 min to determine their MAF, then maintained this pace for three additional minutes while the remaining outcome measures were obtained...
January 2019: Applied Ergonomics
Brian L Day, Matthew J Bancroft
This chapter explores mechanisms that control goal-directed steps for the purpose of reorienting the body or initiating gait. A key issue concerns the control of balance. We argue that standing balance is relinquished while the stepping foot is in the air thus allowing the body to fall under gravity. The falling body's trajectory is largely controlled by motor activity that occurs before the stepping foot leaves the ground (the throw), and is finely tuned to where and when the foot is planned to land (the catch)...
2018: Handbook of Clinical Neurology
Jennifer L Vincenzo, Michelle Gray, Jordan M Glenn
Background and Objectives: Lower-body muscular power and movement velocity (MV) are associated with balance and physical function. The Tendo power analyzer (Tendo) is a portable device that calculates functional lower body power (FLBP) and MV. This reliable (Cronbach's α = .98) method is validated against motion capture analysis of functional lower body sit-to-stand power and velocity ( r = .76). However, the Tendo has not been utilized in discrimination or prediction of falls. We determined the discriminant validity of FLBP and MV among older adults based on the history of falls...
September 2018: Innovation in Aging
Pierre Louis Bernard, Hubert Blain, Aurelie Gerazime, Olivier Maurelli, Jean Bousquet, Grégory Ninot
Background: The aims of this study were (i) to define the relationship between a physical reconditioning cycle using balance exercises and muscular-articular stress and the balance capabilities of sedentary older adults and (ii) to assess whether older adults with weaker equilibrium abilities have a significantly limited progression. Our sample consisted of 338 people (263 women, 75 men) with an age, weight and height of 74.4 years (+/- 8.6), 67 kg (+/- 13.6) and 161.4 cm (+/- 8) and with a body mass index of 25...
2018: European Review of Aging and Physical Activity
Andrew DeWolf, Alyssa McPherson, Kathryn Besong, Claire Hiller, Carrie Docherty
While an important step in a young dancer's ballet career is the transition to pointe work, there is much controversy as to when her body is physically prepared to meet the increased demands of this development. Pointe screening protocols are being used by many in both the dance studio and dance science communities, but these protocols have not yet been standardized. The purpose of this study was to evaluate objectively the attributes of ballet dancers who are pre-pointe compared to those who have recently begun pointe training, and secondarily to correlate these quantitative findings with qualitative evaluations by the dancers' teachers...
December 1, 2018: Journal of Dance Medicine & Science
Mohammed N Ashtiani, Mahmood-Reza Azghani, Mohamad Parnianpour
The static initial postures of standing before applying perturbations may affect the maintenance of postural balance. The goal of this article was to find the stable set of postures and then determine the roles of joint mechanisms. The set of posture was defined in a biomechanical model based on three joint angles of the lower limbs. Optimized inverse dynamics method was used to solve for muscle forces in a precise model of the human musculoskeletal system posed in 4096 static sets of posture using AnyBody software...
November 20, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
Mario Inacio, Rob Creath, Mark W Rogers
Aging brings about challenges in the ability to recover balance through protective stepping, especially in the lateral direction. Previous work has suggested that lateral protective stepping during weight transfer may be affected by impaired muscle composition and performance of the hip abductors (AB) in older adults. Hence, this study investigated the influence of hip abductor-adductor (AB-AD) neuromuscular performance on the weight transfer phase of lateral protective stepping in younger and older adults...
November 9, 2018: Journal of Biomechanics
Hana Song, Mi Gyeong Jang, Ju Yeop Lee, Hee Chul Ko, Sung-Pyo Hur, Se-Jae Kim
INTRODUCTION: It has been reported that various plant species may enhance the elimination of fatigue-related metabolites. However, relatively few studies have directly addressed the potential anti-fatigue effects. OBJECTIVE: The objective of this study was to investigate the anti-fatigue potential of a hot water extract of Sasa quelpaertensis Nakai leaf (SQH) in male ICR mice. METHODS: The animals were divided into three groups. The normal control (NC) group was administered saline without exercise every day for 7 days...
November 17, 2018: Genes & Genomics
Bihter Akınoğlu, Tuğba Kocahan
This study was conducted to compare muscular strength and balance of athletes with visual and hearing impairment. The study was carried out with 20 athletes of national Olympic level sports goalball team and 20 athletes of national Olympic level sports hearing-impaired karate team. Isokinetic muscular strength was assessed by IsoMed 2000 device as concentric-concentric at 60°/sec and 240°/sec. Balance assessment was carried out with the Human Body Equilibrium 360 device. There was no significant difference between groups regarding age, height, weight and body mass index ( P >0...
October 2018: Journal of Exercise Rehabilitation
S Cosentino, R Kasai, Z Gu, S Sessa, Y Kawakami, A Takanishi
Preserving mobility, the ability to keep a correct posture and dynamic balance in order to walk properly, is fundamental to maintain autonomy in daily life. Based on the correlation between muscle groups and autonomy, previous research has suggested that maintaining muscular tone in knee extensors is critical. Continuous training of knee extensors during aging is therefore essential to maintain independence. In this work, it is hypothesized that it is possible to estimate knee extensor activity only from IMU data based on a simple lower limbs model...
July 2018: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Jack M Haglin, Jakub Godzik, Rohit Mauria, Tyler Cole, Corey T Walker, Udaya Kakarla, Juan S Uribe, Jay D Turner
BACKGROUND: Sagittal imbalance in adult spinal deformity (ASD) likely influences balance and ambulatory capacity due to muscular demand, pain, and disability. Disability measures for ASD rely heavily on ambulatory function, yet current metrics may fail to fully capture its contribution. We sought to determine (1) the utility of continuous remote step-count monitoring and activity tracking in ASD using a consumer-friendly accelerometer, and (2) investigate trends and patterns both before and after surgical intervention...
November 12, 2018: World Neurosurgery
T P O'Leary, H M Mantolino, K Stover, R E Brown
Alzheimer's disease (AD) is a neurodegenerative disorder that leads to age-related cognitive and sensori-motor dysfunction. There is an increased understanding that motor dysfunction contributes to overall AD severity, and a need to ameliorate these impairments. The 5xFAD mouse develops the neuropathology, cognitive and motor impairments observed in AD, and thus may be a valuable animal model to study motor deficits in AD. Therefore, we assessed age-related changes in motor ability of male and female 5xFAD mice from 3-16 months of age, using a battery of behavioural tests...
November 13, 2018: Genes, Brain, and Behavior
Andrew J Conith, Daniel T Lam, R Craig Albertson
The shape of the craniofacial skeleton is constantly changing through ontogeny, and reflects a balance between developmental patterning and mechanical-load induced remodeling. Muscles are a major contributor to producing the mechanical environment that is crucial for "normal" skull development. Here we use an F5 hybrid population of Lake Malawi cichlids to characterize the strength and types of associations between craniofacial bones and muscles. We focus on four bones/bone complexes, with different developmental origins, alongside four muscles with distinct functions...
November 12, 2018: Genesis: the Journal of Genetics and Development
Julien Esnault, Besma Missaoui, Samy Bendaya, Michele Mane, Bruno Eymard, Pascal Laforet, Tanya Stojkovic, Anthony Behin, Philippe Thoumie
Facioscapulohumeral muscular dystrophy type 1 is the third most common inherited myopathy. Its severity is proportionate to the loss of microsatellite D4Z4 repetitions, which are below 10. Patients suffer from weakness in facial muscles, shoulder girdles and ankle dorsiflexors. Trunk impairment is reported in few studies. To assess correlation between D4Z4 number of repetitions in facioscapulohumeral muscular dystrophy type 1 patients and trunk extensors and flexors isokinetic peak torque, 48 patients with southern Blot confirmed facioscapulohumeral muscular dystrophy type 1 were enrolled to perform clinical evaluation (Ricci's Clinical Severity Scoring, Berg Balance Scale, Functional Reach Test, timed up-and-go test, six-minute walk test, functional independence measure) and trunk isokinetic assessment...
September 27, 2018: Neuromuscular Disorders: NMD
Yu Zhang, Xiangbin Pan, Yi Sun, Yong-Jian Geng, Xi-Yong Yu, Yangxin Li
Muscle atrophy in aging is characterized by progressive loss of muscle mass and function. Muscle mass is determined by the balance of synthesis and degradation of protein, which are regulated by several signaling pathways such as ubiquitin-proteasome system, autophagy-lysosome systems, oxidative stress, proinflammatory cytokines, hormones, and so on. Sufficient nutrition can enhance protein synthesis, while exercise can improve the quality of life in the elderly. This chapter will discuss the epidemiology, pathogenesis, as well as the current treatment for aging-induced muscular atrophy...
2018: Advances in Experimental Medicine and Biology
Jocemar Ilha, Caroline Cunha do Espírito-Santo, Gabriel Ribeiro de Freitas
In muscle tissue there is a balance between the processes muscle synthesis and degradation. The mammalian target of rapamycin (mTOR) signaling pathway plays a critical role in regulating protein synthesis in order to maintain muscular protein turnover and trophism. Studies have shown that both down- and upregulation mechanisms are involved in this process in a manner dependent on stimulus and cellular conditions. Additionally, mTOR signaling has recently been implicated in several physiological conditions related to cell survival, such as self-digestion (autophagy), energy production, and the preservation of cellular metabolic balance over the lifespan...
2018: Advances in Experimental Medicine and Biology
Wanja Wolff, Maik Bieleke, Anna Hirsch, Christian Wienbruch, Peter M Gollwitzer, Julia Schüler
Enduring physical strain is an important ability and prototypically required in athletic activities. However, little is known about the psychological determinants of endurance performance and their underlying neural mechanisms. Here, we investigated self-regulation as one such factor. We recruited 60 participants who hold intertwined rings for as long as possible while avoiding contacts between them, either with a goal intention or an implementation intention to perform well. Performance was measured in terms of time-to-failure and contact errors...
October 25, 2018: Scientific Reports
Young-Lan Son, Jae-Woon Kim
[Purpose] This study aimed to investigate the effects of mirror neuron system-based self-observation training on lower limb muscle activity and dynamic balance in patients with chronic stroke. [Participants and Methods] Twenty patients with chronic stroke were randomly assigned to a self-observation training group (n=10) or a control group (n=10). Both groups followed a routine 30-minute exercise therapy regimen five days a week for four weeks. The self-observation training group additionally watched video clips of their balance and functional gait training and performed physical training twice over a 10-minute time span...
October 2018: Journal of Physical Therapy Science
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"