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https://www.readbyqxmd.com/read/29773650/the-exercise-inducible-bile-acid-receptor-tgr5-improves-skeletal-muscle-function-in-mice
#1
Takashi Sasaki, Ayane Kuboyama, Moeko Mita, Shotaro Murata, Makoto Shimizu, Jun Inoue, Kazutoshi Mori, Ryuichiro Sato
TGR5 (also known as G protein-coupled bile acid receptor 1, GPBAR1) is a G protein-coupled bile acid receptor that is expressed in many diverse tissues. TGR5 is involved in various metabolic processes, including glucose metabolism and energy expenditure; however, TGR5's function in skeletal muscle is not fully understood. Using both gain- and loss-of-function mouse models, we demonstrate here that Tgr5 activation promotes muscle cell differentiation and muscle hypertrophy. Both young and old transgenic mice with muscle-specific Tgr5 expression exhibited increased muscle strength...
May 17, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29764464/daytime-and-nighttime-casein-supplements-similarly-increase-muscle-size-and-strength-in-response-to-resistance-training-earlier-in-the-day-a-preliminary-investigation
#2
Jordan M Joy, Roxanne M Vogel, K Shane Broughton, Urszula Kudla, Nathaniel Y Kerr, Jason M Davison, Robert E C Wildman, Nancy M DiMarco
BACKGROUND: Casein protein consumed before sleep has been suggested to offer an overnight supply of exogenous amino acids for anabolic processes. The purpose of this study was to compare supplemental casein consumed earlier in the day (DayTime, DT) versus shortly before bed (NightTime, NT) on body composition, strength, and muscle hypertrophy in response to supervised resistance training. METHODS: Thirteen males participated in a 10-week exercise and dietary intervention while receiving 35 g casein daily...
May 15, 2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29726740/self-selected-training-load-and-rpe-during-resistance-and-aerobic-training-among-recreational-exercisers
#3
Marcelo R C Dias, Roberto Simão, Francisco J F Saavedra, Cosme F Buzzachera, Steve Fleck
This study compared training load and ratings of perceived exertion (RPE) during resistance training (RT) and aerobic training (AT) sessions at self-selected intensity. Participants were 54 recreationally trained subjects assigned to either RT or AT groups. During RT, participants performed three sets of 10 repetitions of each exercise at a self-selected intensity (load). After RT completion, participants performed one repetition maximum (1RM) and 10RM tests. During AT, participants performed a treadmill exercise at a self-selected intensity and duration (velocity and time)...
January 1, 2018: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/29717377/a-systematic-review-of-sleep-hypertension-and-cardiovascular-risk-in-children-and-adolescents
#4
REVIEW
Aaron D Fobian, Lindsey Elliott, Tinnie Louie
PURPOSE OF REVIEW: Many of the risk factors for heart disease have recently been shown to develop during childhood such as left ventricular hypertrophy and fibrous plaque lesions. As risk for cardiovascular disease in children and adolescents has risen, sleep duration has decreased, and inadequate sleep in children and adolescents has been found to be associated with cardiovascular disease risk. The aims of this manuscript are to provide an updated systematic review of the literature assessing sleep, hypertension, and cardiovascular risk and evaluate the strength of the evidence based on the available research...
May 1, 2018: Current Hypertension Reports
https://www.readbyqxmd.com/read/29683914/different-patterns-in-muscular-strength-and-hypertrophy-adaptations-in-untrained-individuals-undergoing-nonperiodized-and-periodized-strength-regimens
#5
Eduardo O De Souza, Valmor Tricoli, Jacob Rauch, Michael R Alvarez, Gilberto Laurentino, André Y Aihara, Fabiano N Cardoso, Hamilton Roschel, Carlos Ugrinowitsch
De Souza, EO, Tricoli, V, Rauch, J, Alvarez, MR, Laurentino, G, Aihara, AY, Cardoso, FN, Roschel, H, and Ugrinowitsch, C. Different patterns in muscular strength and hypertrophy adaptations in untrained individuals undergoing non-periodized and periodized strength regimens. J Strength Cond Res 32(5): 1238-1244, 2018-This study investigated the effects of nonperiodized (NP), traditional periodization (TP), and daily undulating periodization (UP) regimens on muscle strength and hypertrophy in untrained individuals...
May 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29679248/effects-of-training-intensity-in-electromyostimulation-on-human-skeletal-muscle
#6
Toshiharu Natsume, Hayao Ozaki, Ryo Kakigi, Hiroyuki Kobayashi, Hisashi Naito
PURPOSE: High-intensity neuromuscular electrical stimulation (NMES) training can induce muscle hypertrophy at the whole muscle and muscle fiber levels. However, whether low-intensity NMES training has a similar result is unknown. This study aimed to investigate whether low-intensity NMES training could elicit muscle hypertrophy at the whole muscle and muscle fiber levels in the human skeletal muscle. METHODS: Eight untrained young males were subjected to 18 min of unilateral NMES training for 8 weeks...
April 20, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29658408/the-compatibility-of-concurrent-high-intensity-interval-training-and-resistance-training-for-muscular-strength-and-hypertrophy-a-systematic-review-and-meta-analysis
#7
Angelo Sabag, Abdolrahman Najafi, Scott Michael, Tuguy Esgin, Mark Halaki, Daniel Hackett
The purpose of this systematic review and meta-analysis is to assess the effect of concurrent high intensity interval training (HIIT) and resistance training (RT) on strength and hypertrophy. Five electronic databases were searched using terms related to HIIT, RT, and concurrent training. Effect size (ES), calculated as standardised differences in the means, were used to examine the effect of concurrent HIIT and RT compared to RT alone on muscle strength and hypertrophy. Sub-analyses were performed to assess region-specific strength and hypertrophy, HIIT modality (cycling versus running), and inter-modal rest responses...
April 16, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29651792/the-plantaris-muscle-rare-relations-to-the-neurovascular-bundle-in-the-popliteal-fossa
#8
Ł Olewnik, M Podgórski, M Polguj, M Topol
The plantaris muscle is characterized by morphological variability, both for origin and insertion, and may sometimes be absent. Its strength allows the ligament to be used for reconstruction of other tendons and ligaments. This report presents the rare placements and course of the plantaris muscle in relation to the neurovascular bundle. In this case, the hypertrophy of this muscle might cause pressure on the tibial nerve and produce symptoms similar to sciatica.
April 13, 2018: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/29644392/effect-of-a-rest-pause-vs-traditional-squat-on-electromyography-and-lifting-volume-in-trained-women
#9
John A Korak, Max R Paquette, Dana K Fuller, Jennifer L Caputo, John M Coons
PURPOSE: Rest-pause (4 s unloaded rest between repetitions) single session training effects on lifting volume, and muscle activity via electromyography (EMG) are currently vague in the literature and can benefit strength and conditioning professionals for resistance training program design. This study compared differences in volume lifted and muscle activity between a rest-pause vs. traditional protocol. METHODS: Trained females (N = 13) completed both a rest-pause and traditional squat protocol consisting of four sets to movement failure at 80% pretest 1 repetition maximum load with 2-min rest between sets...
April 11, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29621305/biomarkers-associated-with-low-moderate-and-high-vastus-lateralis-muscle-hypertrophy-following-12-weeks-of-resistance-training
#10
Christopher B Mobley, Cody T Haun, Paul A Roberson, Petey W Mumford, Wesley C Kephart, Matthew A Romero, Shelby C Osburn, Christopher G Vann, Kaelin C Young, Darren T Beck, Jeffrey S Martin, Christopher M Lockwood, Michael D Roberts
We sought to identify biomarkers which delineated individual hypertrophic responses to resistance training. Untrained, college-aged males engaged in full-body resistance training (3 d/wk) for 12 weeks. Body composition via dual x-ray absorptiometry (DXA), vastus lateralis (VL) thickness via ultrasound, blood, VL muscle biopsies, and three-repetition maximum (3-RM) squat strength were obtained prior to (PRE) and following (POST) 12 weeks of training. K-means cluster analysis based on VL thickness changes identified LOW [n = 17; change (mean±SD) = +0...
2018: PloS One
https://www.readbyqxmd.com/read/29619802/improving-muscular-strength-and-hypertrophy-are-we-following-the-right-scientific-way
#11
Marcos D Polito
No abstract text is available yet for this article.
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29584518/planned-load-reduction-versus-fixed-load-a-strategy-to-reduce-the-perception-of-effort-with-similar-improvements-in-hypertrophy-and-strength
#12
Bruce M Lima, Rafael S Amancio, Diacre S Gonçalves, Alexander J Koch, Victor M Curty, Marco Machado
PURPOSE: The purpose of this study was to compare muscle thickness and 10RM between no load reduction and load reductions during 16 weeks of resistance training (RT). METHODS: Twenty-one moderately trained men (age: 23.2±4.2 years, body mass: 75.1±7.6 Kg, height: 175±4 cm) were randomized into one of three exercise groups: Control (CON, n=7), all sets with 10RM load; 5% load reduction (RED5, n=7), and 10% load reduction (RED10, n=7) for set 2 and set 3. The RT program consisted of completed three sets each of Biceps and Scott Curls, performed to volitional fatigue 3d·wk-1 ...
March 27, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29577974/repetitions-to-failure-versus-not-to-failure-during-concurrent-training-in-healthy-elderly-men-a-randomized-clinical-trial
#13
Larissa Xavier Neves da Silva, Juliana Lopes Teodoro, Erik Menger, Pedro Lopez, Rafael Grazioli, Juliano Farinha, Kelly Moraes, Martim Bottaro, Ronei Silveira Pinto, Mikel Izquierdo, Eduardo Lusa Cadore
This randomized clinical trial compared the neuromuscular adaptations induced by concurrent training (CT) performed with repetitions to concentric failure and not to failure in elderly men. Fifty-two individuals (66.2 ± 5.2 years) completed the pre- and post-measurements and were divided into three groups: repetitions to failure (RFG, n = 17); repetitions not to failure (NFG, n = 20); and repetitions not to failure with total volume equalized to RFG (ENFG, n = 15). Participants were assessed in isometric knee extension peak torque (PTiso ), maximal strength (1RM) in the leg press (LP) and knee extension (KE) exercises, quadriceps femoris muscle thickness (QF MT), specific tension, rate of torque development (RTD) at 50, 100 and 250 ms, countermovement jump (CMJ) and squat jump (SJ) performance, as well as maximal neuromuscular activity (EMGmax ) of the vastus lateralis (VL) and rectus femoris (RF) muscles...
March 22, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29575714/blood-flow-restricted-exercise-providing-more-bang-for-buck-in-trained-athletes
#14
EDITORIAL
Richard A Ferguson
Blood flow restriction (BFR) has been utilised in physiology for centuries; from William Harvey's (1578-1657) initial use of a tourniquet to describe in detail the systemic circulation of blood, to the use in the last 40 years in the investigation of cardiovascular reflex responses, angiogenesis, skeletal muscle metabolism and fatigue. Recent investigation has largely focussed on the adaptive potential of BFR exercise training, with particular reference to skeletal muscle strength and hypertrophy and its use in the rehabilitation process...
March 25, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29570534/neuromuscular-adaptations-to-work-matched-maximal-eccentric-vs-concentric-training
#15
Sumiaki Maeo, Xiyao Shan, Shun Otsuka, Hiroaki Kanehisa, Yasuo Kawakami
It is unclear whether the superiority of eccentric over concentric training on neuromuscular improvements is due to higher torque (mechanical loading) achievable during eccentric contractions or due to resulting greater total work. PURPOSE: To examine neuromuscular adaptations following maximal eccentric versus concentric training matched for total work. METHODS: Twelve males conducted single-joint isokinetic (180°/s) maximal eccentric contractions of the knee extensors in one leg (ECC-leg) and concentric in the other (CON-leg), 6 sets/session (3-5 sets in the initial 1-3 sessions), 2 sessions/week for 10 weeks...
March 22, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29564973/effects-of-different-intensities-of-resistance-training-with-equated-volume-load-on-muscle-strength-and-hypertrophy
#16
Thiago Lasevicius, Carlos Ugrinowitsch, Brad Jon Schoenfeld, Hamilton Roschel, Lucas Duarte Tavares, Eduardo Oliveira De Souza, Gilberto Laurentino, Valmor Tricoli
The present study investigated the effects of different intensities of resistance training (RT) on elbow flexion and leg press one-repetition maximum (1RM) and muscle cross-sectional area (CSA). Thirty men volunteered to participate in an RT programme, performed twice a week for 12 weeks. The study employed a within-subject design, in which one leg and arm trained at 20% 1RM (G20) and the contralateral limb was randomly assigned to one of the three conditions: 40% (G40); 60% (G60), and 80% 1RM (G80). The G20 started RT session with three sets to failure...
March 22, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29554013/high-frequency-neuromuscular-electrical-stimulation-increases-anabolic-signaling
#17
Joni A Mettler, Dillon M Magee, Barbara M Doucet
PURPOSE: Neuromuscular electrical stimulation (NMES) is commonly used in rehabilitation settings to increase muscle mass and strength. However, the effects of NMES on muscle growth are not clear and no human studies have compared anabolic signaling between low-frequency (LF-) and high-frequency (HF-) NMES. The purpose of this study was to determine the skeletal muscle anabolic signaling response to an acute bout of LF- and HF-NMES. METHODS: Eleven young healthy volunteers (6 men; 5 women) received an acute bout of LF- (20 Hz) and HF- (60 Hz) NMES...
March 16, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29541130/low-load-bench-press-and-push-up-induce-similar-muscle-hypertrophy-and-strength-gain
#18
Naoki Kikuchi, Koichi Nakazato
Aim: To investigate the effect of push-up training with a similar load of to 40% of 1- repetition maximumal (1RM) bench press on muscle hypertrophy and strength gain in men. Methods: Eighteen male participants (age, 20.2 ± 0.73 years, range: 19-22 years, height: 169.8 ± 4.4 cm, weight: 64.5 ± 4.7 kg) were randomly assigned to one of two experimental groups: bench press at 40%1RM (bench-press group, n = 9) or push-ups with position adjusted (e.g. kneeling) to the same load of bench-press 40%1RM (push-up group, n = 9), performed twice per week for 8 weeks...
June 2017: Journal of Exercise Science and Fitness
https://www.readbyqxmd.com/read/29538386/prospective-association-between-handgrip-strength-and-cardiac-structure-and-function-in-uk-adults
#19
Sebastian E Beyer, Mihir M Sanghvi, Nay Aung, Alice Hosking, Jackie A Cooper, José Miguel Paiva, Aaron M Lee, Kenneth Fung, Elena Lukaschuk, Valentina Carapella, Murray A Mittleman, Soren Brage, Stefan K Piechnik, Stefan Neubauer, Steffen E Petersen
BACKGROUND: Handgrip strength, a measure of muscular fitness, is associated with cardiovascular (CV) events and CV mortality but its association with cardiac structure and function is unknown. The goal of this study was to determine if handgrip strength is associated with changes in cardiac structure and function in UK adults. METHODS AND RESULTS: Left ventricular (LV) ejection fraction (EF), end-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV), mass (M), and mass-to-volume ratio (MVR) were measured in a sample of 4,654 participants of the UK Biobank Study 6...
2018: PloS One
https://www.readbyqxmd.com/read/29535579/neuromuscular-adaptations-to-low-load-blood-flow-restricted-resistance-training
#20
Summer B Cook, Brendan R Scott, Katherine L Hayes, Bethany G Murphy
Low-load blood flow restricted (BFR) resistance exercise has been suggested to be as effective as moderate and high-load resistance training for increasing muscle size and strength. The purpose of the study was to evaluate the effects of 6 weeks of HL or low-load BFR resistance training on neuromuscular function, strength, and hypertrophy of the knee extensors. Eighteen participants aged 18-22 years old were randomized to one of three training groups: moderate load (ML: 70% of 1 repetition maximum [1-RM]); BFR (20% 1-RM with a vascular restriction set to ~180 mmHg); and a control group (CON) that did not exercise...
March 2018: Journal of Sports Science & Medicine
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