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https://www.readbyqxmd.com/read/28324754/effects-of-sit-to-stand-training-combined-with-transcutaneous-electrical-stimulation-on-spasticity-muscle-strength-and-balance-ability-in-patients-with-stroke-a-randomized-controlled-study
#1
Kyoung-Sim Jung, Tae-Sung In, Hwi-Young Cho
Sit-to-stand is a fundamental movement of human being for performing mobility and independent activity. However, Stroke people symptoms experience difficulty in conducting the sit-to-stand due to paralysis and especially ankle spasticity. Recently, transcutaneouselectrical- stimulation (TENS) is used to reduce pain but also to manage spasticity. The purpose of this study was to determine (1) whether TENS would lead to ankle spasticity reduction and (2) whether sit-to-stand training combined with TENS would improve spasticity, muscle strength and balance ability in stroke patients...
March 10, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28319329/extracellular-acidosis-and-very-low-na-inhibit-nbcn1-and-nhe1-mediated-net-acid-extrusion-from-mouse-vascular-smooth-muscle-cells
#2
Lisbeth Bonde, Ebbe Boedtkjer
AIM: The electroneutral Na(+) ,HCO3(-) -cotransporter NBCn1 and Na(+) /H(+) -exchanger NHE1 regulate acid-base balance in vascular smooth muscle cells (VSMCs) and modify artery function and structure. Pathological conditions-notably ischemia-can dramatically perturb intracellular (i) and extracellular (o) pH and [Na(+) ]. We examined effects of low [Na(+) ]o and pHo on NBCn1 and NHE1 activity in VSMCs of small arteries. METHODS: We measured pHi by 2',7'-bis-(2-carboxyethyl)-5-(and-6)-carboxyfluorescein-based fluorescence microscopy of mouse mesenteric arteries and induced intracellular acidification by NH4(+) -prepulse technique...
March 20, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28319140/role-of-muscle-il-6-in-gender-specific-metabolism-in-mice
#3
Amalia Molinero, Antonio Fernandez-Perez, Aina Mogas, Mercedes Giralt, Gemma Comes, Olaya Fernandez-Gayol, Mario Vallejo, Juan Hidalgo
The aim of the present work was to further explore the physiological roles of muscle-derived IL-6. Adult-floxed and conditional skeletal muscle IL-6 knock out male and female mice were used to study energy expenditure (indirect calorimetry at rest and during treadmill exercise, and body temperature cycle during the light phase) and energy intake (response to fast/refeeding). We also evaluated the responses to leptin and the activity of the insulin signalling pathway in skeletal muscle and liver by phosphorylation of Akt at Ser 473...
2017: PloS One
https://www.readbyqxmd.com/read/28318687/protein-intake-distribution-pattern-does-not-affect-anabolic-response-lean-body-mass-muscle-strength-or-function-over-8-weeks-in-older-adults-a-randomized-controlled-trial
#4
Il-Young Kim, Scott Schutzler, Amy M Schrader, Horace J Spencer, Gohar Azhar, Robert R Wolfe, Arny A Ferrando
BACKGROUND & AIMS: In our recent acute metabolic study, we found no differences in the anabolic response to differing patterns of dietary protein intake. To confirm this in a chronic study, we investigated the effects of protein distribution pattern on functional outcomes and protein kinetics in older adults over 8 weeks. METHODS: To determine chronic effects of protein intake pattern at 1.1 g protein/kg/day in mixed meals on lean body mass (LBM), functional outcomes, whole body protein kinetics and muscle protein fractional synthesis rate (MPS) over 8-week respective dietary intervention, fourteen older subjects were randomly divided into either EVEN or UNVEN group...
March 3, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28317484/redox-systems-antioxidants-and-sarcopenia
#5
Bertrand Fougère, Gabor Abellan van Kan, Bruno Vellas, Matteo Cesari
According to the free-radical theory of aging, oxidative stress is a key contributor to the onset of age-related conditions by inducing structural and functional alterations in several cellular components. Although innate defenses exist for limiting the occurrence of such detrimental effects, their ability to counteract the continuous and large production of reactive oxygen species becomes increasingly inefficient with aging. In this context, interventions aimed at preserving the homeostatic balance between oxidant production and antioxidant protection may be beneficial on the pathophysiological modifications and clinical manifestations featuring the aging process...
March 17, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28316011/changes-in-pro-inflammatory-markers-and-leucine-concentrations-in-response-to-nordic-walking-training-combined-with-vitamin-d-supplementation-in-elderly-women
#6
A Gmiat, J Mieszkowski, K Prusik, K Prusik, J Kortas, A Kochanowicz, A Radulska, M Lipiński, M Tomczyk, J Jaworska, J Antosiewicz, E Ziemann
Mechanisms underpinning age-related decreases in muscle strength and muscle mass relate to chronic inflammation. Physical activity induces an anti-inflammatory effect, but it is modulated by additional factors. We hypothesized that vitamin D, which has also anti-inflammatory activity will modify adaptation to exercise and reduce inflammation in elderly women. Twenty-seven women aged 67 ± 8 years were included and divided into groups with baseline vitamin D concentration more than 20 ng mL(-1) (MVD) and less than 20 ng mL(-1) (LVD)...
March 18, 2017: Biogerontology
https://www.readbyqxmd.com/read/28301438/effects-of-12-week-concurrent-high-intensity-interval-strength-and-endurance-training-programme-on-physical-performance-in-healthy-older-people
#7
Felipe García-Pinillos, José A Laredo-Aguilera, Marcos Muñoz-Jiménez, Pedro A Latorre-Román
This study aimed to analyse the effect of 12-week low-volume HIIT-based concurrent training programme on body composition, upper- and lower-body muscle strength, mobility and balance in older adults, as well as to compare it with a low- moderate-intensity continuous training. 90 active older adults were randomly assigned to experimental (EG, n=47), and control (CG, n=43) groups. Body composition and physical functioning were assessed before (pre-test) and after (post-test) a 12-week intervention. A 2-way repeated measures ANOVA was used to test for an interaction between training programme and groups...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28295912/training-with-a-balance-exercise-assist-robot-is-more-effective-than-conventional-training-for-frail-older-adults
#8
Kenichi Ozaki, Izumi Kondo, Satoshi Hirano, Hitoshi Kagaya, Eiichi Saitoh, Aiko Osawa, Yoichi Fujinori
AIM: To examine the efficacy of postural strategy training using a balance exercise assist robot (BEAR) as compared with conventional balance training for frail older adults. METHODS: The present study was designed as a cross-over trial without a washout term. A total of 27 community-dwelling frail or prefrail elderly residents (7 men, 20 women; age range 65-85 years) were selected from a volunteer sample. Two exercises were prepared for interventions: robotic exercise moving the center of gravity by the balance exercise assist robot system; and conventional balance training combining muscle-strengthening exercise, postural strategy training and applied motion exercise...
March 10, 2017: Geriatrics & Gerontology International
https://www.readbyqxmd.com/read/28292763/oxygen-delivery-and-the-restoration-of-the-muscle-energetic-balance-following-exercise-implications-for-delayed-muscle-recovery-in-patients-with-copd
#9
Gwenael Layec, Corey R Hart, Joel D Trinity, Oh-Sung Kwon, Matthew J Rossman, Ryan M Broxterman, Yann Le Fur, Eun-Kee Jeong, Russell S Richardson
Patients with chronic obstructive pulmonary disease (COPD) experience a delayed recovery from skeletal muscle fatigue following exhaustive exercise that likely contributes to their progressive loss of mobility. As this phenomenon is not well understood, this study sought to examine post-exercise peripheral oxygen (O2) transport and muscle metabolism dynamics in patients with COPD, two important determinants of muscle recovery. Twenty four subjects, 12 non-hypoxemic patients with COPD and 12 healthy subjects with a sedentary lifestyle, performed dynamic plantar flexion exercise at 40% of maximal work rate (WRmax) with phosphorus magnetic resonance spectroscopy ((31)P-MRS), near-infrared spectroscopy (NIRS), and vascular Doppler ultrasound assessments...
March 14, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28290590/the-ca-2-atpase-pump-facilitates-bidirectional-proton-transport-across-the-sarco-endoplasmic-reticulum
#10
L Michel Espinoza-Fonseca
Ca(2+) transport across the sarco/endoplasmic reticulum (SR) plays an essential role in intracellular Ca(2+) homeostasis, signalling, cell differentiation and muscle contractility. During SR Ca(2+) uptake and release, proton fluxes are required to balance the charge deficit generated by the exchange of Ca(2+) and other ions across the SR. During Ca(2+) uptake by the SR Ca(2+)-ATPase (SERCA), two protons are countertransported from the SR lumen to the cytosol, thus partially compensating for the charge moved by Ca(2+) transport...
March 14, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28286988/exercise-and-nutritional-approaches-to-prevent-frail-bones-falls-and-fractures-an-update
#11
R M Daly
Osteoporosis (low bone strength) and sarcopenia (low muscle mass, strength and/or impaired function) often co-exist (hence the term 'sarco-osteoporosis') and have similar health consequences with regard to disability, falls, frailty and fractures. Exercise and adequate nutrition, particularly with regard to vitamin D, calcium and protein, are key lifestyle approaches that can simultaneously optimize bone, muscle and functional outcomes in older people, if they are individually tailored and appropriately prescribed in terms of the type and dose...
April 2017: Climacteric: the Journal of the International Menopause Society
https://www.readbyqxmd.com/read/28285641/effectiveness-of-essential-amino-acid-supplementation-in-stimulating-whole-body-net-protein-anabolism-is-comparable-between-copd-patients-and-healthy-older-adults
#12
Renate Jonker, Nicolaas Ep Deutz, Marcia L Erbland, Paula J Anderson, Mariëlle Pkj Engelen
BACKGROUND: The development of effective nutritional strategies in support of muscle growth for patients with chronic obstructive pulmonary disease (COPD) remains challenging. Dietary essential amino acids (EAAs) are the main driver of postprandial net protein anabolism. In agreement, EAA supplements in healthy older adults are more effective than supplements with the composition of complete proteins. In patients with COPD it is still unknown whether complete protein supplements can be substituted with only EAAs, and whether they are as effective as in healthy older adults...
April 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28280974/post-absorptive-muscle-protein-turnover-affects-resistance-training-hypertrophy
#13
Paul T Reidy, Michael S Borack, Melissa M Markofski, Jared M Dickinson, Christopher S Fry, Rachel R Deer, Elena Volpi, Blake B Rasmussen
PURPOSE: Acute bouts of resistance exercise and subsequent training alters protein turnover in skeletal muscle. The mechanisms responsible for the changes in basal post-absorptive protein turnover and its impact on muscle hypertrophy following resistance exercise training are unknown. Our goal was to determine whether post-absorptive muscle protein turnover following 12 weeks of resistance exercise training (RET) plays a role in muscle hypertrophy. In addition, we were interested in determining potential molecular mechanisms responsible for altering post-training muscle protein turnover...
March 9, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28279661/dynamic-balance-training-improves-physical-function-in-individuals-with-knee-osteoarthritis-a-pilot-randomized-controlled-trial
#14
Judit Takacs, Natasha M Krowchuk, S Jayne Garland, Mark G Carpenter, Michael A Hunt
OBJECTIVE: To examine the effect of a targeted balance training program on dynamic balance and self-reported physical function in people with medial tibiofemoral osteoarthritis (OA). DESIGN: A single-blind randomized controlled trial. SETTING: Exercise gymnasium and community dwellings. PARTICIPANTS: Forty individuals with medial compartment knee OA. INTERVENTION: Ten weeks of partially-supervised exercises targeting dynamic balance and strength performed four times per week, or no intervention (control group)...
March 6, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28276486/a-potential-regulatory-network-underlying-distinct-fate-commitment-of-myogenic-and-adipogenic-cells-in-skeletal-muscle
#15
Wenjuan Sun, Ting He, Chunfu Qin, Kai Qiu, Xin Zhang, Yanhong Luo, Defa Li, Jingdong Yin
Mechanism controlling myo-adipogenic balance in skeletal muscle is of great significance for human skeletal muscle dysfunction and myopathies as well as livestock meat quality. In the present study, two cell subpopulations with particular potency of adipogenic or myogenic differentiation were isolated from neonatal porcine longissimus dorsi using the preplate method to detect mechanisms underlying distinct fate commitment of myogenic and adipogenic cells in skeletal muscle. Both cells share a common surface expression profile of CD29(+)CD31(-)CD34(-)CD90(+)CD105(+), verifying their mesenchymal origin...
March 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28276453/igf-1-potentiates-sensory-innervation-signalling-by-modulating-the-mitochondrial-fission-fusion-balance
#16
Yuan Ding, Jianmin Li, Zhen Liu, Huaxiang Liu, Hao Li, Zhenzhong Li
Restoring the contractile function of long-term denervated skeletal muscle (SKM) cells is difficult due to the long period of denervation, which causes a loss of contractility. Although sensory innervation is considered a promising protective approach, its effect is still restricted. In this study, we introduced insulin-like growth factor-1 (IGF-1) as an efficient protective agent and observed that IGF-1 potentiated the effects of sensory protection by preventing denervated muscle atrophy and improving the condition of denervated muscle cells in vivo and in vitro...
March 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28276085/both-baseline-and-change-in-lower-limb-muscle-strength-in-younger-women-are-independent-predictors-of-balance-in-middle-age-a-12-yr-population-based-prospective-study
#17
Feitong Wu, Michele Callisaya, Karen Wills, Laura L Laslett, Graeme Jones, Tania Winzenberg
Poor balance is a risk factor for falls and fracture in older adults, but little is known about modifiable factors affecting balance in younger women. This study aimed to examine whether lower limb muscle strength (LMS) in young women and changes in LMS are independent predictors of balance in middle-age. This was an observational 10-yr follow-up of 470 women aged 25-44 years at baseline who had previously participated in a 2-yr population-based randomised controlled trial of osteoporosis education interventions...
March 9, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28275246/sarcoplasmic-reticulum-mitochondria-communication-in-cardiovascular-pathophysiology
#18
REVIEW
Camila Lopez-Crisosto, Christian Pennanen, Cesar Vasquez-Trincado, Pablo E Morales, Roberto Bravo-Sagua, Andrew F G Quest, Mario Chiong, Sergio Lavandero
Repetitive, calcium-mediated contractile activity renders cardiomyocytes critically dependent on a sustained energy supply and adequate calcium buffering, both of which are provided by mitochondria. Moreover, in vascular smooth muscle cells, mitochondrial metabolism modulates cell growth and proliferation, whereas cytosolic calcium levels regulate the arterial vascular tone. Physical and functional communication between mitochondria and sarco/endoplasmic reticulum and balanced mitochondrial dynamics seem to have a critical role for optimal calcium transfer to mitochondria, which is crucial in calcium homeostasis and mitochondrial metabolism in both types of muscle cells...
March 9, 2017: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/28272379/importance-of-independent-sit-to-stand-ability-in-ambulatory-patients-with-spinal-cord-injury
#19
Lalita Khuna, Pipatana Amatachaya, Thanat Sooknuan, Thiwabhorn Thaweewannakij, Lugkana Mato, Jiamjit Seangsuwan, Sugalya Amatachaya
BACKGROUND: Sit-to-stand (STS) is an important and basic activity for daily living. However, a few studies have reported information relating to STS ability in ambulatory patients with spinal cord injury (SCI). AIM: To investigate factors associated with the ability of independent sit- to-stand (iSTS) among ambulatory patients with SCI. DESIGN: Cross-sectional cohort study. SETTING: Inpatient tertiary rehabilitation centre and several communities in Thailand...
March 8, 2017: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/28269496/the-correlation-between-transcranial-magnetic-stimulation-parameters-and-neuromuscular-properties-in-children-with-cerebral-palsy
#20
H Marzbani, Sh Parvin, S Amiri, M Lotfian, M R Kharazi, Sh Azizi, M M Mirbagheri
We studied the correlation between corticospinal signaling and neuromuscular properties in children with Cerebral Palsy (CP). Corticospinal signaling was evaluated using Transcranial Magnetic Stimulation (TMS). Neuromuscular properties were quantified using Hoffmann reflex (H-reflex), sonoelastography, clinical measurements, and isokinetic measures. In particular, we determined the relationship between the TMS parameters of the ankle joint and the neuromuscular features of ankle extensors and flexors as well as popular clinical measures of gait speed, endurance, balance and mobility...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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