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https://www.readbyqxmd.com/read/28415066/effect-of-barbell-weight-on-the-structure-of-the-flat-bench-press
#1
Henryk Król, Artur Gołaś
Król, H and Gołaś, A. Effect of barbell weight on the structure of the flat bench press. J Strength Cond Res 31(5): 1321-1337, 2017-In this study, we have used the multimodular measuring system SMART. The system consisted of 6 infrared cameras and a wireless module to measure muscle bioelectric activity. In addition, the path of the barbell was measured with a special device called the pantograph. Our study concerns the change in the structure of the flat bench press when the weight of the barbell is increased...
May 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28409508/performance-of-muscle-strength-and-fatigue-tolerance-in-young-trained-women-supplemented-with-caffeine
#2
Carlos A Fett, Natalia Magalhães Aquino, Jairo Schantz, Camila F Brandão, Joás D de Araújo Cavalcanti, Waleria C Rezende Fett
BACKGROUND: Verify the effect of caffeine supplementation on the muscular strength and fatigue tolerance of young trained women. METHODS: Eight women of 25±5 years old, who had undergone a minimum of 12 months of continuous resisted training, body mass index 20-23 kg/m2 were submitted to four tests: one repetition maximum (1- RM, kg) to pull down (PD), hack squat (HS), bench press (BP), and; knee extension exhaustion (drop-set, 100/80/60 kg, repetitions) (DS). They perform the tests in four consecutive blocks one-week apart crossover system: basal without caffeine (B); first caffeine (C1); placebo with starch supplementation (P); second caffeine (C2)...
April 13, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28399016/the-effects-of-beef-chicken-or-whey-protein-post-workout-on-body-composition-and-muscle-performance
#3
Matthew H Sharp, Ryan P Lowery, Kevin A Shields, Jason R Lane, Jocelyn L Gray, Jeremy M Partl, Daniel W Hayes, Gabriel J Wilson, Chase A Hollmer, Julie R Minivich, Jacob M Wilson
The purpose of this study was to determine the effects of post-workout consumption of beef protein isolate (Beef), hydrolyzed chicken protein (Chx) or whey protein concentrate (WPC), compared to a control on lean mass and strength during 8 weeks of resistance training. Forty-one males and females were randomized into four groups: WPC (m=5, f=5; Age (yrs)=19 ± 2, Height (cm)=171 ± 10, Mass (kg)= 74.60 ± 14.19), Beef (m=5, f=5; Age (yrs)=22 ± 4, Height (cm)=170 ± 7, Mass (kg)=70.13 ± 8.16), ChxC(m=5, f=6; Age (yrs)=21 ± 2, Height (cm)=169 ± 9, Mass (kg)=74...
April 7, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28396785/spontaneous-pneumomediastinum-after-bench-press-training
#4
Tomoya Nishino
Spontaneous pneumomediastinum is often associated with asthma and mainly affects adolescent males with a tall, thin body habitus. A 17-year-old man complained of chest and pharyngeal pain after bench press training and spontaneous pneumomediastinum was diagnosed. It should be considered in the differential diagnosis of chest pain of uncertain cause.
April 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28394832/strength-and-conditioning-training-by-the-danish-national-handball-team-prior-to-an-olympic-tournament
#5
Thue Kvorning, Mikkel R B Hansen, Kurt Jensen
The physical demands imposed on national team handball teams during the Olympics imply significant physical preparation in order to improve performance and reduce incidence of injuries. The purpose of the present case report is to describe and analyze the strength and conditioning (S&C) training carried out by the Danish national handball team before the Beijing Olympic Games. Eight weeks of S&C was divided into blocks of 5 weeks emphasizing muscle hypertrophy and long interval running followed by 3 weeks emphasizing strength, power and short interval running...
April 7, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28392264/effects-of-bodypump-and-resistance-training-with-and-without-a-personal-trainer-on-muscle-strength-and-body-composition-in-overweight-and-obese-women-a-randomised-controlled-trial
#6
Anne Mette Rustaden, Lene A H Haakstad, Gøran Paulsen, Kari Bø
OBJECTIVES: Overweight and obese individuals are recommended to perform regular resistance training, and the health- and fitness industry offer several exercise programs with purpose to improve muscle strength and body composition. This randomised controlled trial aimed to compare 12 weeks (45-60min, 3 sessions/weeks) of popular exercise programs, available at health- and fitness centers worldwide. METHODS: Previous untrained women with BMI≥25 were allocated to either BodyPump (a high-repetition group session) (n=25), individual resistance training with a personal trainer (n=25), non-supervised individual resistance training (n=21) and non-exercising control group (n=21)...
April 6, 2017: Obesity Research & Clinical Practice
https://www.readbyqxmd.com/read/28347219/the-national-football-league-225-bench-press-test-and-the-size-weight-illusion
#7
Paul E Luebbers, Gavin Buckingham, Michael S Butler
The purpose of this study was to test reports that size and arrangement manipulations of weight plates (i.e., inducing a size-weight illusion [SWI]) would have an effect on athletic weightlifting performance. The participants were 72 experienced, weight-trained collegiate American football players. Across 3 weeks, each athlete performed three different repetitions-to-fatigue bench press tests (NFL-225, SWI-225, and SWI-215). A multiple regression revealed a positive association between participants' strength relative to the test load and repetitions for NFL-225 and SWI-215, but no association with SWI-225...
January 1, 2017: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/28338394/inter-and-intra-subject-similarity-of-muscle-synergies-during-bench-press-with-slow-and-fast-velocity
#8
Afshin Samani, Mathias Kristiansen
We investigated the effect of low and high bar velocity on inter- and intra-subject similarity of muscle synergies during bench press. Thirteen trained male subjects underwent two exercise conditions, i.e. a slow and a fast velocity bench press. Surface electromyography was recorded from thirteen muscles and muscle synergies were extracted using a non-negative matrix factorization algorithm. The intra-subject similarity across conditions and inter-subject similarity within conditions were computed for muscle synergy vectors and activation coefficients...
March 24, 2017: Motor Control
https://www.readbyqxmd.com/read/28328719/predicting-the-maximum-dynamic-strength-in-bench-press-the-high-precision-of-the-bar-velocity-approach
#9
Irineu Loturco, Ronaldo Kobal, José E Moraes, Katia Kitamura, César C Cal Abad, Lucas A Pereira, Fábio Y Nakamura
Loturco, I, Kobal, R, Moraes, JE, Kitamura, K, Cal Abad, CC, Pereira, LA, and Nakamura, FY. Predicting the maximum dynamic strength in bench press: the high precision of the bar velocity approach. J Strength Cond Res 31(4): 1127-1131, 2017-The aim of this study was to determine the force-velocity relationship and test the possibility of determining the 1 repetition maximum (1RM) in "free weight" and Smith machine bench presses. Thirty-six male top-level athletes from 3 different sports were submitted to a standardized 1RM bench press assessment (free weight or Smith machine, in randomized order), following standard procedures encompassing lifts performed at 40-100% of 1RM...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28327505/technical-aspects-and-validation-of-a-new-biofeedback-system-for-measuring-lower-limb-loading-in-the-dynamic-situation
#10
Marco Raaben, Herman R Holtslag, Robin Augustine, Rutger O van Merkerk, Bart F J M Koopman, Taco J Blokhuis
BACKGROUND: A variety of techniques for measuring lower limb loading exists, each with their own limitations. A new ambulatory biofeedback system was developed to overcome these limitations. In this study, we described the technical aspects and validated the accuracy of this system. METHODS: A bench press was used to validate the system in the static situation. Ten healthy volunteers were measured by the new biofeedback system and a dual-belt instrumented treadmill to validate the system in the dynamic situation...
March 22, 2017: Sensors
https://www.readbyqxmd.com/read/28327461/muscle-strength-is-impaired-in-men-but-not-in-women-living-with-hiv-taking-antiretroviral-therapy
#11
Vitor Hf Oliveira, Susana L Wiechmann, Argéria Ms Narciso, Allison R Webel, Rafael Deminice
BACKGROUND: There is evidence that HIV Antiretroviral Therapy adverse effects may be sex-dependent, but data examing these sex differences in muscle strength is scarce. Our aim was to compare dynamic and isokinetic parameters of muscle strength between HIV-infected men and women to HIV-uninfected subjects. METHODS: In this cross-sectional study, muscle strength was evaluated in 44 HIV-infected (20 men, 24 women) and 25 age-, race- and body mass index-matched HIV-uninfected subjects (11 men, 14 women)...
March 22, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/28301439/efficacy-of-the-repetitions-in-reserve-based-rating-of-perceived-exertion-for-the-bench-press-in-experienced-and-novice-benchers
#12
Michael J Ormsbee, Joseph P Carzoli, Alex Klemp, Brittany R Allman, Michael C Zourdos, Jeong-Su Kim, Lynn B Panton
Autoregulation (AR) is the practice of adjusting training variables in response to athlete feedback. One component of AR postulated to enhance resistance training adaptations involves implementing a resistance training-specific rating of perceived exertion (RPE) scale measuring repetitions in reserve (RIR). The purpose of this study was to examine the efficacy of this method using the bench press exercise. METHODS: Twenty-seven college-aged men were assigned to one of two groups based upon training age: experience benchers (EB) (n=14, training age: 4...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28282743/can-changes-in-resistance-exercise-workload-influence-internal-load-countermovement-jump-performance-and-the-endocrine-response
#13
Daniel J Hiscock, Brian Dawson, Michael Clarke, Peter Peeling
This study examined the influence of differing volume load and intensity (%1 repetition maximum[%1RM]) resistance exercise workouts on session rating of perceived exertion (sRPE) countermovement jump (CMJ) performance and endocrine responses. Twelve participants performed a workout comprising four exercises (bench press, back squat, deadlift and prone bench pull) in randomised order as either power (POW); 3 sets × 6 repetitions at 45%1RM × 3 min inter-set rest, strength (ST); 3 sets × 3 repetitions at 90%1RM × 3 min inter-set rest, or hypertrophy (HYP); 3 sets × 10 repetitions at 70%1RM × 1 min inter-set rest in a randomised-crossover design...
February 23, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28277425/the-influence-of-resistance-training-experience-on-the-between-day-reliability-of-commonly-used-strength-measures-in-male-youth-athletes
#14
Jonathon Weakley, Kevin Till, Joshua Darrall-Jones, Gregory Roe, Padraic Phibbs, Dale Read, Ben Jones
The purpose of this study was to determine the between-day reliability of commonly used strength measures in male youth athletes, while considering resistance training experience. Data were collected on 25 male athletes over two testing sessions, with 72 hours rest between, for the 3RM front squat, chin up and bench press. Subjects were initially categorized by resistance training experience (inexperienced; 6-12 months, experienced; >2 years). The assessment of the between-day reliability (coefficient of variation [CV%]) showed the front squat (experienced: 2...
March 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28260202/biochemical-responses-and-physical-performance-during-high-intensity-resistance-circuit-training-in-hypoxia-and-normoxia
#15
Domingo J Ramos-Campo, Jacobo A Rubio-Arias, Stéphane Dufour, Linda Chung, Vicente Ávila-Gandía, Pedro E Alcaraz
PURPOSE: The aim of this study was to analyze the effect of hypoxia on metabolic and acid-base balance, blood oxygenation, electrolyte, and half-squat performance variables during high-resistance circuit (HRC) training. METHODS: Twelve resistance-trained subjects participated in this study. After a 6RM testing session, participants performed three randomized trials of HRC: normoxia (NORM: FiO2 = 0.21), moderate hypoxia (MH: FiO2 = 0.16), or high hypoxia (HH: FiO2 = 0...
March 4, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28255966/effect-of-resistance-exercise-on-arterial-stiffness-during-the-follicular-and-luteal-phases-of-the-menstrual-cycle
#16
Takanobu Okamoto, Ryota Kobayashi, Mikako Sakamaki-Sunaga
Acute high-intensity resistance exercise increases arterial stiffness. Changes in blood concentrations of estrogen and progesterone associated with the menstrual cycle affect the degree of arterial stiffness. Therefore, high-intensity resistance exercise may affect arterial stiffness differently depending on the phase of the menstrual cycle. The purpose of this study was to investigate the effects of different phases of the menstrual cycle on arterial stiffness after one session of resistance exercise. The participants were 9 eumenorrheic females (21...
March 2, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28225524/the-effects-of-ballistic-and-non-ballistic-bench-press-on-mechanical-variables
#17
Gavin L Moir, Shawn N Munford, Lindsey L Moroski, Shala E Davis
PURPOSE: To investigate the effects of ballistic and non-ballistic bench press performed with loads equivalent to 30 and 90% 1-repetition maximum (1-RM) on mechanical variables. METHODS: Eleven resistance-trained men (age: 23.0 ± 1.4 years; mass: 98.4 ± 14.4 kg) attended four testing sessions where they performed one of the following sessions: 1) three sets of five non-ballistic repetitions performed with a load equivalent to 30% 1-RM (30N-B), 2) three sets of five ballistic repetitions performed with a load equivalent to 30% 1-RM (30B), 3) three sets of four non-ballistic repetitions with a load equivalent to 90% 1-RM (90N-B), 4) three sets of four ballistic repetitions with a load equivalent to 90% 1-RM (90B)...
February 21, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28222577/acute-ingestion-of-neuromuscular-enhancement-supplements-do-not-improve-power-output-work-capacity-and-cognition
#18
Jennifer A Bunn, Andrew Crossley, Morgan D Timiney
BACKGROUND: Improving motor unit recruitment and function is trainable and positively affects performance. Evidence suggests that supplementation of choline, uridine, and docosahexaenoic acid (DHA) may also enhance neuromuscular function. The purpose of this study was to assess the influence of acute ingestion of these supplements on anaerobic exercise performance and cognition. METHODS: Twenty college-aged trained males (21.2 ± 1.4 years, 181.2 ± 6.1 cm, 94.4 ± 20...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28217216/repair-of-double-head-pectoralis-major-tendon-avulsion-into-its-native-footprint-using-bi-cortical-endobuttons-and-tendon-sliding-technique
#19
Jagadish Prabhu, Mohammed Khalid Faqi, Fahad Alkhalifa, Bader Kamal Tayara, Rashad Khamis Awad
Injuries to the pectoralis major muscle are relatively infrequent. The mechanism of injury is usually an eccentric shortening of the pectoralis major under heavy load, such as when performing a bench press exercise. We report a case that presented to us with a history of sudden pain in the left pectoral region while doing heavy bench press exercise. The patient sustained a type III D pectoralis muscle -tendon avulsion. Surgical repair was done through a bi-cortical tendon sliding technique using two cortical buttons...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28195973/repetition-performance-and-blood-lactate-responses-adopting-different-recovery-periods-between-training-sessions-in-trained-men
#20
Humberto Miranda, Marianna de Freitas Maia, Gabriel Andrade Paz, João A A A de Souza, Roberto Simão, Déborah de Araújo Farias, Jeffrey M Willardson
The purpose of this study was to examine the effect of different recovery periods (24h, 48h, and 72h) between repeated resistance training (RT) sessions for the upper body muscles on repetition performance and blood lactate responses in trained men. Sixteen recreationally trained men (age: 26.1 ± 3.1 years; height: 179 ± 4.5 cm; body mass: 82.6 ± 4.0 kg, 4.5 ± 2.2 years of RT experience) participated in this study. Eight-repetition maximum (8-RM) loads were determined for the bench press (BP), 30° incline bench press (BP30), and 45° incline bench press (BP45) exercises...
February 8, 2017: Journal of Strength and Conditioning Research
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