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https://www.readbyqxmd.com/read/28822112/effectiveness-of-resistance-circuit-based-training-for-maximum-oxygen-uptake-and-upper-body-one-repetition-maximum-improvements-a-systematic-review-and-meta-analysis
#1
REVIEW
Francisco Antonio Muñoz-Martínez, Jacobo Á Rubio-Arias, Domingo Jesús Ramos-Campo, Pedro E Alcaraz
BACKGROUND: It is well known that concurrent increases in both maximal strength and aerobic capacity are associated with improvements in sports performance as well as overall health. One of the most popular training methods used for achieving these objectives is resistance circuit-based training. OBJECTIVE: The objective of the present systematic review with a meta-analysis was to evaluate published studies that have investigated the effects of resistance circuit-based training on maximum oxygen uptake and one-repetition maximum of the upper-body strength (bench press exercise) in healthy adults...
August 18, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28809466/tuning-phase-composition-of-polymer-nanocomposites-towards-high-energy-density-and-high-discharge-efficiency-by-non-equilibrium-processing
#2
Jianyong Jiang, Xin Zhang, Zhenkang Dan, Jing Ma, Yuanhua Lin, Ming Li, Ce-Wen Nan, Yang Shen
Polymer nanocomposite dielectrics with high energy density and low loss are major enablers for a number of applications in modern electronic and electrical industry. Conventional fabrication of nanocomposites by solution routes involves equilibrium process which is slow and results in structural imperfections, hence high leakage current and compromised reliability of the nanocomposites. We propose and demonstrate that a non-equilibrium process, which synergistically integrates electrospinning, hot-pressing and thermal quenching, is capable of yielding nanocomposites of very high quality...
August 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28796130/the-effects-of-superset-configuration-on-kinetic-kinematic-and-perceived-exertion-in-the-barbell-bench-press
#3
Jonathon Js Weakley, Kevin Till, Dale B Read, Padraic J Phibbs, Gregory Roe, Joshua Darrall-Jones, Ben L Jones
Training that is efficient and effective is of great importance to an athlete. One method of improving efficiency is by incorporating supersets into resistance training routines. However, the structuring of supersets is still unexplored. Therefore, the purpose of this study was to assess the effects of agonist-antagonist (A-A), alternate peripheral (A-P), and similar biomechanical (SB) superset configurations on rate of perceived exertion (RPE), kinetic and kinematic changes during the bench press. 10 subjects performed resistance training protocols in a randomized-crossover design, with magnitude-based inferences assessing changes/differences within and between protocols...
August 4, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28795879/influence-of-different-attentional-focus-on-emg-amplitude-and-contraction-duration-during-the-bench-press-at-different-speeds
#4
Joaquin Calatayud, Jonas Vinstrup, Markus D Jakobsen, Emil Sundstrup, Juan Carlos Colado, Lars L Andersen
The purpose of this study was to investigate whether using different focus affects electromyographic (EMG) amplitude and contraction duration during bench press performed at explosive and controlled speeds. Eighteen young male individuals were familiarized with the procedure and performed the one-maximum repetition (1RM) test in the first session. In the second session, participants performed the bench press exercise at 50% of the 1RM with 3 different attentional focuses (regular focus on moving the load vs contracting the pectoralis vs contracting the triceps) at 2 speed conditions (controlled vs maximal speed)...
August 10, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28777244/the-effect-of-a-sprint-interval-and-resistance-concurrent-exercise-training-program-on-aerobic-capacity-of-inactive-adult-women
#5
Lorena Salom Huffman, Shelby J Foote, Hayden Hyatt, James R McDonald, Danielle D Wadsworth, David D Pascoe
The purpose of this investigation was to examine the effects of high-intensity concurrent exercise training (CET) consisting of sprint intervals (SIT) and resistance exercise (RET) protocols on aerobic capacity in recreationally active, adult females. Fifty-three participants were pair-matched according to preliminary maximal aerobic capacity (VO2max) Bruce protocol assessment into level-grade (SIT0) or 6% incline (SIT6) groups. This 12-week intervention consisted of three CET sessions per week. SIT protocol consisted of 2 (weeks 1-6) then 3 (weeks 7-12) sets of three 40s sprints at specific intensities to evoke responses equivalent to 95% of age-predicted maximal heart rate (HR) interspersed with 20s of rest; with 1-minute of passive recovery between sets...
August 2, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28771050/prediction-of-the-maximum-number-of-repetitions-and-repetitions-in-reserve-from-barbell-velocity
#6
Amador García-Ramos, Alejandro Torrejón, Belén Feriche, Antonio J Morales-Artacho, Alejandro Pérez-Castilla, Paulino Padial, Guy Gregory Haff
PURPOSE: This study aimed to provide two general equations to estimate (1) the maximum possible number of repetitions (XRM) from the mean velocity (MV) of the barbell, and (2) the MV associated with a given number of repetitions in reserve, as well as (3) to determine the between-sessions reliability of the MV associated with each XRM. METHODS: After the determination of the bench press one-repetition maximum (1RM: 1.15±0.21 kg·kg(-1) body mass), 21 men (age: 23...
August 3, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28763003/short-term-effects-of-a-ready-to-drink-pre-workout-beverage-on-exercise-performance-and-recovery
#7
Patrick B Collins, Conrad P Earnest, Ryan L Dalton, Ryan J Sowinski, Tyler J Grubic, Christopher J Favot, Adriana M Coletta, Christopher Rasmussen, Mike Greenwood, Richard B Kreider
In a double-blind, randomized and crossover manner, 25 resistance-trained participants ingested a placebo (PLA) beverage containing 12 g of dextrose and a beverage (RTD) containing caffeine (200 mg), β-alanine (2.1 g), arginine nitrate (1.3 g), niacin (65 mg), folic acid (325 mcg), and Vitamin B12 (45 mcg) for 7-days, separated by a 7-10-day. On day 1 and 6, participants donated a fasting blood sample and completed a side-effects questionnaire (SEQ), hemodynamic challenge test, 1-RM and muscular endurance tests (3 × 10 repetitions at 70% of 1-RM with the last set to failure on the bench press (BP) and leg press (LP)) followed by ingesting the assigned beverage...
August 1, 2017: Nutrients
https://www.readbyqxmd.com/read/28760091/pectoralis-major-rupture
#8
Joshua D Shumway, Danielle N Anderson, Dana J Hess
A 33-year-old male military service member was referred to physical therapy 4 days after competing in a bench-press competition, during which he was unable to accomplish an attempt due to a sharp/stabbing pain in his right shoulder. Given the concern for a ruptured pectoralis major, and after consultation with the orthopaedic surgeon and radiologist, magnetic resonance imaging was performed. Findings revealed a complete rupture of the pectoralis major tendon, with up to 5 cm of retraction. J Orthop Sports Phys Ther 2017;47(8):578...
August 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28745472/effect-of-eight-weeks-of-upper-body-plyometric-training-during-the-competitive-season-on-professional-female-volleyball-players
#9
David Valades, José M Palao, Pedro Femia, Aurelio Ureña
BACKGROUND: The purpose of this study was to assess the effect of incorporating specific upper-body plyometric training for the spike into the competitive season of a women's professional volleyball team. METHODS: A professional team from the Spanish first division participated in the study. An A-B-A' quasi-experimental design with experimental and control groups was used. The independent variable was the upper-body plyometric training for eight weeks during the competitive season...
July 25, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28742112/energy-cost-of-isolated-resistance-exercises-across-low-to-high-intensities
#10
Victor Machado Reis, Nuno Domingos Garrido, Jeferson Vianna, Ana Catarina Sousa, José Vilaça Alves, Mário Cardoso Marques
This study aimed to estimate the energy cost across various intensities at eight popular resistance exercises: half squat, 45° inclined leg press, leg extension, horizontal bench press, 45° inclined bench press, lat pull down, triceps extension and biceps curl. 58 males (27.5 ± 4.9 years, 1.78 ± 0.06 m height, 78.67 ± 10.7 kg body mass and 11.4 ± 4.1% estimated body fat) were randomly divided into four groups of 14 subjects each. For each group, two exercises were randomly assigned and on different days, they performed four bouts of 5-min constant-intensity for each of the two assigned exercises: 12%, 16%, 20% and 24% 1-RM...
2017: PloS One
https://www.readbyqxmd.com/read/28737588/longer-concentric-action-increases-muscle-activation-and-neuromuscular-fatigue-responses-in-protocols-equalized-by-repetition-duration
#11
Lucas T Lacerda, Cinara G Costa, Fernando V Lima, Hugo C Martins-Costa, Rodrigo C R Diniz, André G P Andrade, Gustavo H C Peixoto, Michael G Bemben, Mauro H Chagas
The aim of this study was to investigate the impact of protocols equalized by the repetition duration but composed of different concentric and eccentric durations on muscle activation and neuromuscular fatigue. Seventeen males with previous experience in resistance training performed 3 training protocols (A - 2s con : 4s ecc; B - 3s con : 3s ecc; and C - 4s con : 2s ecc) with the Smith machine bench press exercise, all with 3 sets, 6 repetitions, 3 minutes' rest, and 60% of 1RM. The normalized root mean square of the electromyographic signal (EMGRMS) and mean frequency electromyography (EMGMF) for pectoralis major and triceps brachii muscles were calculated for 2nd and 5th repetitions in each set...
July 19, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28723813/effect-of-resistance-training-on-blood-pressure-and-autonomic-responses-in-treated-hypertensives
#12
Gabriela Alves Trevizani, Mariana Balbi Seixas, Paulo Roberto Benchimol-Barbosa, Jeferson Macedo Vianna, Lilian Pinto da Silva, Jurandir Nadal
This study evaluated the effect of resistance training (RT) on heart rate variability (HRV) and on blood pressure (BP) responses to acute and short-term exposure in treated hypertensive subjects. Twenty one men participated in the study, eight hypertensive under drug treatment regimen and achieving adequate blood pressure control prior to inclusion (HT) and thirteen normotensive (NT). The RT protocol consisted of 12 sessions with 8 exercises (leg extension, leg press, leg curl, bench press, seated row, triceps push-down, seated calf flexion and seated arm curl) performed for 2 sets of 15-20 repetitions with 50% of one repetition-maximum (1RM) with 2-minute rest intervals in between sets, 3x/week...
July 17, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28714752/differences-in-the-load-velocity-profile-between-four-bench-press-variants
#13
Amador García-Ramos, Francisco Luis Pestaña-Melero, Alejandro Pérez-Castilla, Francisco Javier Rojas, Guy Gregory Haff
PURPOSE: This study aimed to compare the load-velocity relationship between four variants of the bench press (BP) exercise. METHODS: The full load-velocity relationship of 30 men were evaluated by means of an incremental loading test starting at 17 kg progressing to the individual one-repetition maximum (1RM) in four BP variants: concentric-only BP, concentric-only bench press throw (BPT), eccentric-concentric BP, and eccentric-concentric BPT. RESULTS: A strong and fairly linear relationship between mean velocity (MV) and %1RM was observed for the four BP variants (r(2) > 0...
July 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28714743/an-alternate-test-of-tackling-ability-in-rugby-league-players
#14
Michael JAJ Speranza, Tim J Gabbett, David A Greene, Rich D Johnston, Andrew D Townshend, Brett O'Farrell
This study investigated the relationship between two tests of tackling ability, muscular strength and power in semi-professional rugby league players. Thirty-one players, 19 first grade and 12 second grade underwent tests of muscular strength (1 repetition maximum bench press, chin-up, and squat) and power (plyometric push-up and countermovement jump). Tackling ability was assessed via video analysis of under-the-ball and over-the-ball tackle drills. The first grade players had significantly greater scores in both the under-the-ball (P = 0...
July 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28713459/the-effects-of-bench-press-variations-in-competitive-athletes-on-muscle-activity-and-performance
#15
Atle Hole Saeterbakken, Dag-André Mo, Suzanne Scott, Vidar Andersen
The aim of the study was to compare the EMG activity performing 6RM competition style bench press (flat bench-wide grip) with 1) medium and narrow grip widths on a flat bench and 1) inclined and declined bench positions with a wide grip. Twelve bench press athletes competing at national and international level participated in the study. EMG activity was measured in the pectoralis major, anterior and posterior deltoid, biceps brachii, triceps brachii and latissimus dorsi. Non-significant differences in activation were observed between the three bench positions with the exception of 58...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28702807/effect-of-rest-pause-vs-traditional-bench-press-training-on-muscle-strength-electromyography-and-lifting-volume-in-randomized-trial-protocols
#16
J Adam Korak, Max R Paquette, Justin Brooks, Dana K Fuller, John M Coons
PURPOSE: Rest-pause (4-s unloaded rest between repetitions) training effects on one repetition maximum (1 RM), lifting volume, and neural activation via electromyography (EMG) are currently vague in the literature and can benefit strength and conditioning professionals for resistance training programme design. Therefore, this study compared 1 RM, neural activation via (EMG), and volume differences between rest-pause vs. traditional resistance training. METHODS: Trained males (N = 20) were randomly assigned to either a rest-pause or a traditional training group...
July 12, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28702697/the-acute-effect-of-strength-exercises-at-different-intensities-on-intraocular-pressure
#17
Jesús Vera, Amador García-Ramos, Raimundo Jiménez, David Cárdenas
BACKGROUND: This study aimed to determine the effect of two basic strength exercises with progressive loads on intraocular pressure (IOP). METHODS: Seventeen (out of 20 recruited) physically active male military officers (46 ± 4.77 years) performed the jump squat and the ballistic bench press exercises, in counterbalanced order, with four and five progressive loads, respectively. IOP was measured with a rebound tonometer before and after each of the corresponding loads...
July 12, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28686081/letter-to-the-editor-concerning-the-article-bar-velocities-capable-of-optimising-the-muscle-power-in-strength-power-exercises-by-loturco-pereira-abad-tabares-moraes-kobal-kitamura-nakamura-2017
#18
Slobodan Jaric, Amador Garcia Ramos
Loturco and co-workers (2017) recently published data in the Journal of Sports Sciences to present the optimum loading magnitudes regarding the maximization of the "mean propulsive power" of the leg and arm muscles. Among the most important findings were that (1) the recorded power in the squat and squat jump exercises was markedly low, (2) the optimum external load that maximized the power in the same exercises was close to 100% of body weight, while (3) the ballistic bench press throw revealed smaller power than the regular bench press typically performed with relatively low level of muscle activation towards the end of the propulsive lifting phase...
July 7, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28674872/efficacy-of-wearing-compression-garments-during-post-exercise-period-after-two-repeated-bouts-of-strenuous-exercise-a-randomized-crossover-design-in-healthy-active-males
#19
Kazushige Goto, Sahiro Mizuno, Ayaka Mori
BACKGROUND: The efficacy of wearing [a] compression garment (CG) between repeated bouts of exercise within a same day has not been fully understood. The present study determined the effect of wearing a CG after strenuous exercise sessions (consisting of sprint exercise, resistance exercise, drop jump) twice a day on exercise performance, muscle damage, and inflammatory responses. METHODS: Eleven physically active males (age, 22.7 ± 0.9 years; height, 175...
December 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/28671855/free-weight-resistance-exercise-on-pulse-wave-reflection-and-arterial-stiffness-between-sexes-in-young-resistance-trained-adults
#20
J Derek Kingsley, Yu Lun Tai, Xian Mayo, Alaina Glasgow, Erica Marshall
We sought to determine the sex-specific effects of an acute bout of free-weight resistance exercise (RE) on pulse wave reflection (aortic blood pressures, augmentation index (AIx), AIx at 75 bpm (AIx@75), augmentation pressure (AP), time of the reflected wave (Tr), subendocardial viability ratio (SEVR)), and aortic arterial stiffness in resistance-trained individuals. Resistance-trained men (n = 14) and women (n = 12) volunteered to participate in the study. Measurements were taken in the supine position at rest, and 10 minutes after 3 sets of 10 repetitions at 75% 1-repetition maximum on the squat, bench press, and deadlift...
September 2017: European Journal of Sport Science
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