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https://www.readbyqxmd.com/read/28704311/acute-neuromuscular-and-endocrine-responses-to-two-different-compound-exercises-squat-versus-deadlift
#1
Matthew J Barnes, Adam Miller, Daniel Reeve, Robin Jc Stewart
Anecdotally, it is believed that the deadlift exercise brings about greater levels of central fatigue than other exercises; however no empirical evidence exists to support this view. Additionally, little is known about the acute endocrine response to heavy deadlift exercise and how this may differ to other similar compound exercises. Therefore, the aim of this study was to identify and compare the acute, neuromuscular and endocrine responses to squat and deadlift exercise. Ten resistance trained males completed 8 sets of 2 repetitions at 95 % of one repetition maximum...
July 12, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28701169/comparison-between-semg-and-force-as-control-interfaces-to-support-planar-arm-movements-in-adults-with-duchenne-a-feasibility-study
#2
Joan Lobo-Prat, Kostas Nizamis, Mariska M H P Janssen, Arvid Q L Keemink, Peter H Veltink, Bart F J M Koopman, Arno H A Stienen
BACKGROUND: Adults with Duchenne muscular dystrophy (DMD) can benefit from devices that actively support their arm function. A critical component of such devices is the control interface as it is responsible for the human-machine interaction. Our previous work indicated that surface electromyography (sEMG) and force-based control with active gravity and joint-stiffness compensation were feasible solutions for the support of elbow movements (one degree of freedom). In this paper, we extend the evaluation of sEMG- and force-based control interfaces to simultaneous and proportional control of planar arm movements (two degrees of freedom)...
July 12, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28700513/sled-towing-acutely-decreases-acceleration-sprint-time
#3
Megan A Wong, Ian J Dobbs, Casey M Watkins, Saldiam R Barillas, A Lin, David C Archer, Robert G Lockie, Jared W Coburn, Lee E Brown
Sled towing is a common form of overload training in sports to develop muscular strength for sprinting. This type of training leads to acute and chronic outcomes. Acute training potentially leads to postactivation potentiation (PAP), which is when subsequent muscle performance is enhanced following a preload stimulus. The purpose of this study was to determine differences between rest intervals following sled towing on acute sprint speed. Twenty healthy recreationally trained males (age= 22.3 ± 2.4yrs, height= 176...
July 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28675124/combined-individual-scrummaging-kinetics-and-muscular-power-predict-competitive-team-scrum-success
#4
Andrew Green, Chloe Dafkin, Samantha Kerr, Warrick McKinon
Scrummaging is a major component of Rugby Union gameplay. Successful scrummaging is dependent on the coordination of the forward players and the strength of the eight individuals. The study aim was to determine whether individual scrummaging kinetics and other candidate factors associated with scrummaging performance discriminate team scrum performances. Sixteen club-level forwards (stature: 1.80 ± 0.1 m; mass: 99.0 ± 18.2 kg) were initially divided into two scrummaging packs. A total of 10 various scrum permutations were tested, where players were randomly swapped between the two packs...
July 4, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28671937/clinical-model-of-exercise-related-dyspnea-in-adult-patients-with-cystic-fibrosis
#5
Daniel Stevens, Heather F Neyedli
PURPOSE: Dyspnea is a highly distressing symptom of pulmonary disease that can make performing physical activities challenging. However, little is known regarding the strongest predictors of exercise-related dyspnea in adult cystic fibrosis (CF). Therefore, the purpose of the present study was to determine the best clinical model of exercise-related dyspnea in this patient group. METHODS: A retrospective analysis of pulmonary function and cardiopulmonary exercise testing data from patients with CF being followed up at the Adult CF Program at St Michael's Hospital, Toronto, Canada, from 2002 to 2008 were used for the analysis...
June 30, 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28670284/tensiomyographic-markers-are-not-sensitive-for-monitoring-muscle-fatigue-in-elite-youth-athletes-a-pilot-study
#6
Thimo Wiewelhove, Christian Raeder, Rauno Alvaro de Paula Simola, Christoph Schneider, Alexander Döweling, Alexander Ferrauti
Objective: Tensiomyography (TMG) is an indirect measure of a muscle's contractile properties and has the potential as a technique for detecting exercise-induced skeletal muscle fatigue. Therefore, the aim of this study was to assess the sensitivity of tensiomyographic markers to identify reduced muscular performance in elite youth athletes. Methods: Fourteen male junior tennis players (age: 14.9 ± 1.2 years) with an international (International Tennis Federation) ranking position participated in this pre-post single group trial...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28666826/affective-symptoms-in-schizophrenia-are-strongly-associated-with-neurocognitive-deficits-indicating-disorders-in-executive-functions-visual-memory-attention-and-social-cognition
#7
Buranee Kanchanatawan, Supaksorn Thika, George Anderson, Piotr Galecki, Michael Maes
The aim of this study was to assess the neurocognitive correlates of affective symptoms in schizophrenia. Towards this end, 40 healthy controls and 80 schizophrenia patients were investigated with six tests of the Cambridge Neuropsychological Test Automated Battery (CANTAB), assessing spatial working memory, paired-association learning, one touch stocking, rapid visual information (RVP), emotional recognition test and intra/extradimensional set shifting. The Hamilton Depression (HDRS) and Anxiety (HAMA) Rating Scales and the Calgary Depression Scale for Schizophrenia (CDSS) as well as the Positive and Negative Syndrome Scale (PANSS) were also used...
June 27, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28663375/sexually-dimorphic-skeletal-muscle-and-cardiac-dysfunction-in-a-mouse-model-of-limb-girdle-muscular-dystrophy-2i
#8
Joseph W Maricelli, Denali R Kagel, Yemeserach M Bishaw, O Lynne Nelson, David C Lin, Buel D Rodgers
The fukutin-related protein P448L mutant mouse replicates pathologies common to limb-girdle muscular dystrophy 2i (LGMD2i) and is a strong candidate for relevant drug screening studies. Because striated muscle function remains relatively uncharacterized in this mouse, we sought to identify metabolic, functional and histological metrics of exercise and cardiac performance by quantifying voluntary exercise on running wheels, forced exercise on respiratory treadmills and cardiac output with echocardiography and isoproterenol stress tests...
June 29, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28642711/weekly-time-course-of-neuro-muscular-adaptation-to-intensive-strength-training
#9
Niklas Brown, Dieter Bubeck, Daniel F B Haeufle, Johannes Weickenmeier, Ellen Kuhl, Wilfried Alt, Syn Schmitt
Detailed description of the time course of muscular adaptation is rarely found in literature. Thus, models of muscular adaptation are difficult to validate since no detailed data of adaptation are available. In this article, as an initial step toward a detailed description and analysis of muscular adaptation, we provide a case report of 8 weeks of intense strength training with two active, male participants. Muscular adaptations were analyzed on a morphological level with MRI scans of the right quadriceps muscle and the calculation of muscle volume, on a voluntary strength level by isometric voluntary contractions with doublet stimulation (interpolated twitch technique) and on a non-voluntary level by resting twitch torques...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28639444/comparison-of-shuttle-and-straight-repeated-sprint-ability-tests-and-their-relationship-to-anthropometrics-and-explosive-muscular-performance-of-lower-limb-in-elite-handball-players
#10
Souhail Hermassi, René Schwesig, Rainer Wollny, Georg Fieseler, Roland van den Tillaar, Jaime Fernandez-Fernandez, Roy J Shephard, Mohamed S Chelly
BACKGROUND: This study assessed inter-relationships between shuttle and straight repeated-sprint ability tests and the relationship of each measure to anthropometric and explosive lower limb performance data in elite handball players. METHODS: Twenty-two elite male handball players (18.9 ± 0.2 years; body mass: 83.3 ± 1.1 kg, height: 1.79 ± 2.30 m, body fat: 12.8 ± 0.2%) completed tests that included a lower limb force-velocity test of peak power (Wpeak), jumping ability (squat and counter-movement jumps; SJ, CMJ), 1 repetition maximum (1-RM) half back squat, average sprint velocity over 5 m (V-5 m), peak velocity between 25-30 m (Vmax), and Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1), and anthropometric determinations of cross-sectional areas and muscle volumes for leg and thigh muscles...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28634456/absolute-and-relative-training-load-and-its-relation-to-fatigue-in-football
#11
Unai Zurutuza, Julen Castellano, Ibon Echeazarra, David Casamichana
The aim of the study was to assess the relationship of external and internal training load (TL) indicators with the objective and subjective fatigue experienced by 15 semi-professional football players, over eight complete weeks of the competition period in the 2015-2016 season, which covered microcycles from 34th to 41st. The maximum heart rate (HRmax) and maximum speed (Vmax) of all the players were previously measured in specific tests. The TL was monitored via questionnaires on rating of perceived exertion (RPE), pulsometers and GPS devices, registering the variables: total distance (TD), player load 2D (PL2D), TD at >80% of the Vmax (TD80), TD in deceleration at < -2 m⋅sec-2 (TDD <-2), TD in acceleration >2 m⋅sec(-2) (TDA >2), Edwards (ED), time spent at between 50 and 80% (50-80% HRmax), 80-90% (80-90% HRmax), and >90% of the HRmax (>90% HRmax), and RPE both respiratory/thoracic (RPEres) and leg/muscular (RPEmus)...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28627356/aquatic-therapy-for-children-with-duchenne-muscular-dystrophy-a-pilot-feasibility-randomised-controlled-trial-and-mixed-methods-process-evaluation
#12
Daniel Hind, James Parkin, Victoria Whitworth, Saleema Rex, Tracey Young, Lisa Hampson, Jennie Sheehan, Chin Maguire, Hannah Cantrill, Elaine Scott, Heather Epps, Marion Main, Michelle Geary, Heather McMurchie, Lindsey Pallant, Daniel Woods, Jennifer Freeman, Ellen Lee, Michelle Eagle, Tracey Willis, Francesco Muntoni, Peter Baxter
BACKGROUND: Duchenne muscular dystrophy (DMD) is a rare disease that causes the progressive loss of motor abilities such as walking. Standard treatment includes physiotherapy. No trial has evaluated whether or not adding aquatic therapy (AT) to land-based therapy (LBT) exercises helps to keep muscles strong and children independent. OBJECTIVES: To assess the feasibility of recruiting boys with DMD to a randomised trial evaluating AT (primary objective) and to collect data from them; to assess how, and how well, the intervention and trial procedures work...
May 2017: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/28624715/impact-of-physical-activity-in-group-versus-individual-physical-activity-on-fatigue-in-patients-with-breast-cancer-a-pilot-study
#13
Christine Desbiens, Myriam Filion, Marie-Chantale Brien, Jean-Charles Hogue, Christian Laflamme, Julie Lemieux
BACKGROUND: Physical activity improves the quality of life of cancer survivors, but whether there is a difference between individual vs. group physical activity is unknown. OBJECTIVES: To compare fatigue at 12 weeks in breast cancer survivors after participation in a program of group vs. individual video-assisted physical activity. METHODS: This was a randomized phase II pilot study carried out in breast cancer survivors at a tertiary breast cancer center...
June 15, 2017: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/28623435/the-brain-behaves-as-a-muscle
#14
Marinella Coco
It is known that lactate accumulates in the skeletal muscle during intense anaerobic exercise but is rapidly cleared from the muscles when they resume aerobic metabolism; however, at least some lactate reaches the blood stream. It has been observed that during maximal exercise, blood lactate increases with transport of the blood to the brain. This could be interpreted as a mechanism to protect against possible "central fatigue" in times of maximal activity during the course of which the lactate would preserve the functionality of the primary cortical motor and sensory areas, even at the expense of the efficiency of the other structures...
June 16, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28620932/fiber-type-composition-of-the-palmaris-brevis-muscle-implications-for-palmar-function
#15
Colin W Moore, Tyler S Beveridge, Charles L Rice
The palmaris brevis (PB) is a small muscle of variant morphology located on the ulnar aspect of the palm, superficial to the hypothenar eminence. Functionally, the PB has been proposed to protect the neurovasculature of the ulnar canal from compressive forces during repetitive or intermittent trauma associated with grasping. Although PB function has been inferred from cadaveric observations, it is unknown whether it has the contractile capacity and fatigue-resistance necessary to withstand these functional demands...
June 16, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28603362/comparison-of-muscular-fatigue-and-tone-of-neck-according-to-craniocervical-flexion-exercise-and-suboccipital-relaxation-in-cervicogenic-headache-patients
#16
Dae Jung Yang, Da Haeng Kang
[Purpose] This study was conducted to compare and analyze influence of craniocervical flexion and suboccipitalis relaxation in cervicogenic headache patients of their cervical muscular fatigue, tone, and headache intensity. [Subjects and Methods] 30 patients with cervicogenic headache were selected and 10 subjects per group were randomly assigned to control group, craniocervical flexion exercise group, and suboccipitalis relaxation group. Intervention for each group was provided 5 times a week for 4 weeks. Muscular tone test and muscular fatigue test were conducted on both sides of upper trapezius and sternocleidomastoideus and visual analogue sclae on the headache intensity was conducted before the intervention, after 2 weeks, and after 4 weeks...
May 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28600706/effects-of-resistance-exercise-in-prostate-cancer-patients-a-meta-analysis
#17
REVIEW
M Keilani, T Hasenoehrl, L Baumann, R Ristl, M Schwarz, M Marhold, T Sedghi Komandj, R Crevenna
PURPOSE: The aim of the present meta-analysis was to quantify effects of resistance exercise (RE) on physical performance and function, body composition, health-related quality of life (HRQoL), and fatigue in patients with prostate cancer. METHODS: Trial data were obtained from the databases PubMed, MEDLINE, EMBASE, SCOPUS, and the Cochrane Library as of inception to 31st of December 2016. Thirty-two trials with 1199 patients were included. Results that were measured by using the same assessment method in five or more of the original studies were pooled in a meta-analysis...
June 10, 2017: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28600596/relevance-of-early-cervical-cord-volume-loss-in-the-disease-evolution-of-clinically-isolated-syndrome-and-early-multiple-sclerosis-a-2-year-follow-up-study
#18
Inga T Hagström, Ruth Schneider, Barbara Bellenberg, Anke Salmen, Florian Weiler, Odo Köster, Ralf Gold, Carsten Lukas
Upper cervical cord area (UCCA) atrophy is a prognostic marker for clinical progression in longstanding multiple sclerosis (MS). The objectives of the study were to quantify UCCA atrophy and evaluate its impact in clinically isolated syndrome (CIS) and relapsing-remitting MS (RRMS); to compare converting CIS patients with stable CIS, and to study changes of UCCA and brain white matter (WM) and grey matter (GM) at 2-year follow-up. 110 therapy-naive patients including 53 CIS [6 ± 6 months after symptom onset (SO)] and 57 early RRMS (SO: 12 ± 9 months) underwent sagittal 3D-T1w brain MR (3T)...
July 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28587894/burrowing-as-a-novel-voluntary-strength-training-method-for-mice-a-comparison-of-various-voluntary-strength-or-resistance-exercise-methods
#19
P Roemers, P N Mazzola, P P De Deyn, W J Bossers, M J G van Heuvelen, E A van der Zee
BACKGROUND: Voluntary strength training methods for rodents are necessary to investigate the effects of strength training on cognition and the brain. However, few voluntary methods are available. NEW METHOD: The current study tested functional and muscular effects of two novel voluntary strength training methods, burrowing (digging a substrate out of a tube) and unloaded tower climbing, in male C57Bl6 mice. To compare these two novel methods with existing exercise methods, resistance running and (non-resistance) running were included...
June 3, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28582899/effect-of-whole-body-vibration-on-lactate-level-recovery-and-heart-rate-recovery-in-rest-after-intense-exercise
#20
Seung Rok Kang, Jin-Young Min, Changho Yu, Tae-Kyu Kwon
OBJECTIVE: In this paper, we investigated the recovery of the lactate level, muscular fatigue, and heart rate recovery (HRR) with respect to whole body vibration (WBV) during the rest stage after a gait exercise. METHODS: A total of 24 healthy subjects with no medical history of exercise injury participated. The participants were divided into a training group with vibration during rest and a control group with the same conditions but without vibration. The subjects performed a gait exercise with a slope of 15% and velocity of 4 km/h to consume 450 kcal in 30 min...
May 19, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
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