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https://www.readbyqxmd.com/read/28820857/kinematic-and-neuromuscular-measures-of-intensity-during-plyometric-jumps
#1
David Cristóbal Andrade, Oscar Manzo, Ana Rosa Beltrán, Cristian Álvarez, Rodrigo Del Rio, Camilo Toledo, Jason Moran, Rodrigo Ramirez-Campillo
The aim of this study was to assess jumping performance and neuromuscular activity in lower limb muscles after drop jumps (DJ) from different drop heights (intensity) and during continuous jumping (fatigue), using markers such as reactive strength, jump height, mechanical power and surface electromyography (sEMG). The eccentric (EC) and concentric (CON) sEMG from the medial gastrocnemius (MG), biceps femoris (BF) and rectus (R) muscles were assessed during all tests. In a cross-sectional, randomized study, eleven volleyball players (age 24...
August 15, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28820846/noninvasive-assessment-of-skeletal-muscle-myosin-heavy-chain-expression-in-trained-and-untrained-men
#2
Andrew C Fry, Terry J Housh, Joel B Cramer, Joseph P Weir, Travis W Beck, Brian K Schilling, Jonathan D Miller, Justin X Nicoll
Fry, AC, Housh, TJ, Cramer, JB, Weir, JP, Beck, TW, Schilling, BK, Miller, JD, and Nicoll, JX. Noninvasive assessment of skeletal muscle myosin heavy chain expression in trained and untrained men. J Strength Cond Res 31(9): 2355-2362, 2017-Numerous conditions and types of physical activity (e.g., exercise, aging, and muscle-related diseases) can influence muscle fiber types and the proteins expressed. To date, muscle fibers can only be characterized by actually obtaining a tissue sample using the invasive muscle biopsy procedure...
September 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28820278/does-additional-biceps-augmentation-improve-rotator-cuff-healing-and-clinical-outcomes-in-anterior-l-shaped-rotator-cuff-tears-clinical-comparisons-with-arthroscopic-partial-repair
#3
Yoon Sang Jeon, Juyeob Lee, Rag Gyu Kim, Young-Won Ko, Sang-Jin Shin
BACKGROUND: The repair of anterior L-shaped tears is usually difficult because of the lack of anterior rotator cuff tendon to cover the footprint. The biceps tendon is usually exposed from the retracted anterolateral corner of the torn tendon and can be easily used to augment rotator cuff repair. Hypothesis/Purpose: This study compared the clinical outcomes of the biceps augmentation technique with those of partial tendon repair for the arthroscopic treatment of large anterior L-shaped rotator cuff tears to evaluate the role of additional biceps augmentation in tendon healing...
August 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28819744/correlations-do-not-show-cause-and-effect-not-even-for-changes-in-muscle-size-and-strength
#4
Scott J Dankel, Samuel L Buckner, Matthew B Jessee, J Grant Mouser, Kevin T Mattocks, Takashi Abe, Jeremy P Loenneke
It is well known that resistance exercise results in increased muscle strength, but the cause of the improvement is not well understood. It is generally thought that initial increases in strength are caused by neurological factors, before being predominantly driven by increases in muscle size. Despite this hypothesis, there is currently no direct evidence that training-induced increases in muscle size contribute to training-induced increases in muscle strength. The evidence used to support this hypothesis is exclusively correlational analyses and these are often an afterthought using data collected to answer a different question of interest...
August 17, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28819679/neuromuscular-electrical-stimulation-is-effective-in-strengthening-the-quadriceps-muscle-after-anterior-cruciate-ligament-surgery
#5
REVIEW
Annette V Hauger, M P Reiman, J M Bjordal, C Sheets, L Ledbetter, A P Goode
PURPOSE: Reduced ability to contract the quadriceps muscles is often found immediately following anterior cruciate ligament (ACL) surgery. This can lead to muscle atrophy and decreased function. Application of neuromuscular electrical stimulation (NMES) may be a useful adjunct intervention to ameliorate these deficits following ACL surgery. The purpose of this review was to determine whether NMES in addition to standard physical therapy is superior to standard physical therapy alone in improving quadriceps strength or physical function following ACL surgery...
August 17, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28818411/long-term-supplementation-with-egcg-and-beta-alanine-decreases-mortality-but-does-not-affect-cognitive-or-muscle-function-in-aged-mice
#6
Brandt D Pence, Tushar K Bhattacharya, Pul Park, Jennifer L Rytych, Jacob M Allen, Yi Sun, Robert H McCusker, Keith W Kelley, Rodney W Johnson, Justin S Rhodes, Jeffrey A Woods
We have previously shown that 6weeks of a diet containing epigallocatechin gallate (EGCG) and beta-alanine (B-ALA) was not effective in improving either cognitive or muscle function in aged (18month) mice (Gibbons et al. Behav Brain Res 2014). However, diet reduced oxidative stress in the brain, and previous studies using longer-term interventions have documented beneficial effects in cognitive, but not muscle, function. Therefore, we investigated the effect of 6months of feeding on measures of cognitive and muscle function in mice...
August 14, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28817825/muscle-strength-and-muscle-mass-in-older-patients-during-hospitalization-the-empower-study
#7
Jeanine M Van Ancum, Kira Scheerman, Vincent D Pierik, Siger T Numans, Sjors Verlaan, Hanne E Smeenk, Monique Slee-Valentijn, Roeliene C Kruizinga, Carel G M Meskers, Andrea B Maier
BACKGROUND: Low muscle strength and muscle mass are associated with an increased length of hospital stay and higher mortality rate in inpatients. To what extent hospitalization affects muscle strength and muscle mass is unclear. OBJECTIVE: We aimed to assess muscle strength and muscle mass at admission and during hospitalization in older patients and its relation with being at risk of geriatric conditions. METHODS: The EMPOWER study included patients aged 70 years and older, admitted to 4 wards of the VU University Medical Center in the Netherlands between April and December 2015...
August 18, 2017: Gerontology
https://www.readbyqxmd.com/read/28817412/effect-of-physical-methods-of-lymphatic-drainage-on-postexercise-recovery-of-mixed-martial-arts-athletes
#8
Aleksandra Zebrowska, Robert Trybulski, Robert Roczniok, Wieslaw Marcol
OBJECTIVE: Physical methods are reported to be important for accelerating skeletal muscle regeneration, decreasing muscle soreness, and shortening of the recovery time. The aim of the study was to assess the effect of the physical methods of lymphatic drainage (PMLD) such as manual lymphatic drainage (MLD), the Bodyflow (BF) therapy, and lymphatic drainage by deep oscillation (DO) on postexercise regeneration of the forearm muscles of mixed martial arts (MMA) athletes. DESIGN AND METHODS: Eighty MMA athletes aged 27...
August 16, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28817355/total-training-load-may-explain-similar-strength-gains-and-muscle-hypertrophy-seen-in-aged-rats-submitted-to-resistance-training-and-anabolic-steroids
#9
Walter Krause Neto, Wellington de Assis Silva, Adriano Polican Ciena, Danilo Bocalini, Ricardo Aparecido Baptista Nucci, Carlos Alberto Anaruma, Eliane Florencio Gama
This study aimed to quantify training parameters and analyze the morphological response of aged muscles submitted to resistance training and anabolic steroids. Aged Wistar rats were divided into groups: C - initial control; CF - final control; CAS - control with anabolic steroid, RT - resistance training, and RTA - resistance training with anabolic steroid. Maximum carried load, absolute and relative loads increased significantly in RT and RTA. RTA demonstrated greater relative load than RT. Average total volume, total climbing volume, relative total volume, relative total climbing volume, and mean climbing volume were similar between groups RT and RTA...
August 17, 2017: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
https://www.readbyqxmd.com/read/28816944/acute-changes-in-neuromuscular-activity-in-vertical-jump-and-flexibility-after-exposure-to-whole-body-vibration
#10
Giuseppe Annino, Ferdinando Iellamo, Francesco Palazzo, Augusto Fusco, Mauro Lombardo, Francesca Campoli, Elvira Padua
This study was aimed to investigate the neuromuscular activity after 10 minutes of exposure to a whole body vibration (WBV) session.Twenty male young adults (24.8 ± 2.5 year olds) were randomized and divided into 2 groups: the vibration group (VG) was exposed to 10 minutes of WBV at 35 Hz; performed 10 minutes of WBV at 35 Hz (displacement = 5 mm; magnitude = 5 g); the nonvibrated group (NVG) was the placebo group that maintained the same position on the plate but without exposure to any type of vibration...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816922/nil-whey-protein-effect-on-glycaemic-control-after-intense-mixed-mode-training-in-t2d
#11
Kim A Gaffney, Adam Lucero, Lee Stoner, James Faulkner, Patricia Whitfield, Jeremy Krebs, David S Rowlands
While intense endurance and resistance exercise training and whey protein supplementation have both been shown to independently improve glycaemic control, no known studies have examined the effect of high-intensity mixed-mode interval training (MMIT) and whey supplementation in adults with Type-2 diabetes (T2D). PURPOSE: To determine if peri-training whey protein supplementation combined with MMIT can improve glycaemic control. METHODS: In a double-blind randomised controlled trial, 24 men (55...
August 14, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28816769/do-psychosocial-factors-predict-muscle-strength-pain-or-physical-performance-in-patients-with-knee-osteoarthritis
#12
Isabel A C Baert, Mira Meeus, Armaghan Mahmoudian, Frank P Luyten, Jo Nijs, Sabine M P Verschueren
OBJECTIVE: The aim of this study was to examine the relationship of psychosocial factors, namely, pain catastrophizing, kinesiophobia, and maladaptive coping strategies, with muscle strength, pain, and physical performance in patients with knee osteoarthritis (OA)-related symptoms. METHODS: A total of 109 women (64 with knee OA-related symptoms) with a mean age of 65.4 years (49-81 years) were recruited for this study. Psychosocial factors were quantified by the Pain Catastrophizing Scale, Tampa Scale for Kinesiophobia, and Pain Coping Inventory...
August 14, 2017: Journal of Clinical Rheumatology: Practical Reports on Rheumatic & Musculoskeletal Diseases
https://www.readbyqxmd.com/read/28815984/relationships-between-central-arterial-stiffness-lean-body-mass-and-absolute-and-relative-strength-in-young-and-older-men-and-women
#13
Christopher A Fahs, Robert S Thiebaud, Lindy M Rossow, Jeremy P Loenneke, Debra A Bemben, Michael G Bemben
Relationships between muscular strength and arterial stiffness as well as between muscle mass and arterial stiffness have been observed suggesting a link between the neuromuscular system and vascular health. However, the relationship between central arterial stiffness and absolute and relative strength along with muscle mass has not been investigated in both sexes across a broad age range. The purpose of this study was to examine the relationship between central arterial stiffness and absolute and relative strength as well as between central arterial stiffness and lean body mass (LBM) in men and women across a broad age range...
August 16, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28814844/comparison-between-parameters-of-muscle-performance-and-inflammatory-biomarkers-of-non-sarcopenic-and-sarcopenic-elderly-women
#14
Lygia Paccini Lustosa, Patrícia Parreira Batista, Daniele Sirineu Pereira, Leani Souza Máximo Pereira, Aline Scianni, Giane Amorim Ribeiro-Samora
BACKGROUND: Sarcopenia is a multifactorial geriatric syndrome with complex interrelationships. Increased plasma levels of inflammatory mediators increase the catabolic stimuli of the musculature, thereby causing a decrease in mass and muscular function. OBJECTIVE: The objective of this study was to compare the performance of the knee extensors test (by isokinetic dynamometer) and plasma levels of interleukin-6 (IL-6) and soluble receptors of tumor necrosis factor alpha (sTNFR1) between sarcopenics and non-sarcopenics community-dwelling elderly women residents of Brazil...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28814614/role-of-inactivity-in-chronic-diseases-evolutionary-insight-and-pathophysiological-mechanisms
#15
REVIEW
Frank W Booth, Christian K Roberts, John P Thyfault, Gregory N Ruegsegger, Ryan G Toedebusch
This review proposes that physical inactivity could be considered a behavior selected by evolution for resting, and also selected to be reinforcing in life-threatening situations in which exercise would be dangerous. Underlying the notion are human twin studies and animal selective breeding studies, both of which provide indirect evidence for the existence of genes for physical inactivity. Approximately 86% of the 325 million in the United States (U.S.) population achieve less than the U.S. Government and World Health Organization guidelines for daily physical activity for health...
October 1, 2017: Physiological Reviews
https://www.readbyqxmd.com/read/28814401/effects-of-protein-supplementation-combined-with-resistance-exercise-on-body-composition-and-physical-function-in-older-adults-a-systematic-review-and-meta-analysis
#16
Chun-De Liao, Jau-Yih Tsauo, Yen-Tzu Wu, Chin-Pao Cheng, Hui-Chuen Chen, Yi-Ching Huang, Hung-Chou Chen, Tsan-Hon Liou
Background: Overweight and obese older people face a high risk of muscle loss and impaired physical function, which may contribute to sarcopenic obesity. Resistance exercise training (RET) has a beneficial effect on muscle protein synthesis and can be augmented by protein supplementation (PS). However, whether body weight affects the augmentation of muscular and functional performance in response to PS in older people undergoing RET remains unclear.Objective: This study was conducted to identify the effects of PS on the body composition and physical function of older people undergoing RET...
August 16, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28814054/crux-a-compliant-robotic-upper-extremity-exosuit-for-lightweight-portable-multi-joint-muscular-augmentation
#17
Steven Lessard, Pattawong Pansodtee, Ash Robbins, Leya Breanna Baltaxe-Admony, James M Trombadore, Mircea Teodorescu, Adrian Agogino, Sri Kurniawan
Wearable robots can potentially offer their users enhanced stability and strength. These augmentations are ideally designed to actuate harmoniously with the user's movements and provide extra force as needed. The creation of such robots, however, is particularly challenging due to the underlying complexity of the human body. In this paper, we present a compliant, robotic exosuit for upper extremities called CRUX. This exosuit, inspired by tensegrity models of the human arm, features a lightweight (1.3 kg), flexible multi-joint design for portable augmentation...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813972/novel-ankle-orthosis-with-elastomer-embedded-flexible-joint
#18
Takehito Kikuchi, Kohei Ishiya, Isao Abe, Sosuke Tanida, Takashi Yasuda
In this study, we propose a new ankle orthosis with elastomer-embedded flexible joints (EEFJ), composed of C-shaped springs and 3D-printed circular elastomer. This orthosis was designed to reduce burden on the tibialis anterior muscle (TA) and to achieve clearance between the tip of the toe and the ground. Fabrication method, strength testing, and gait analysis were conducted. According to the results of strength testing, the combination of the C-spring with 0.3 mm and 0.5 mm thickness and the elastomer with 30% and 60% filling density performs a supporting torque of 0...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813968/changes-in-neuromuscular-activity-during-motor-training-with-a-body-machine-interface-after-spinal-cord-injury
#19
C Pierella, A De Luca, E Tasso, F Cervetto, S Gamba, L Losio, E Quinland, A Venegoni, S Mandraccia, I Muller, A Massone, F A Mussa-Ivaldi, M Casadio
Body machine interfaces (BMIs) are used by people with severe motor disabilities to control external devices, but they also offer the opportunity to focus on rehabilitative goals. In this study we introduced in a clinical setting a BMI that was integrated by the therapists in the rehabilitative treatments of 2 spinal cord injured (SCI) subjects for 5 weeks. The BMI mapped the user's residual upper body mobility onto the two coordinates of a cursor on a screen. By controlling the cursor, the user engaged in playing computer games...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813914/data-sample-size-needed-for-analysis-of-kinematic-and-muscle-synergies-in-healthy-and-stroke-populations
#20
Navid Lambert-Shirzad, H F Machiel Van der Loos
Multiple studies have suggested the central nervous system (CNS) generates motions by using modular control of muscles and joints (synergies). However, the synergies reported by these studies are task dependent and might not reflect the true control strategies adopted by the CNS. Studying exploratory motions (EMs) can reveal biomechanical constraints and motor control strategies in healthy and clinical populations. The first logical step to consider EMs in study of motor synergies is to determine how much data is required to reliably and fully profile the motion patterns of an individual...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
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