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https://www.readbyqxmd.com/read/28433473/sex-difference-in-the-heat-shock-response-to-high-external-load-resistance-training-in-older-humans
#1
Rose Njemini, Louis Nuvagah Forti, Tony Mets, Evelien Van Roie, Walter Coudyzer, Ingo Beyer, Christophe Delecluse, Ivan Bautmans
BACKGROUND: Literature reports on the effects of resistance training on heat shock protein70 (Hsp70) adaptation in older subjects are scarce. Moreover, the optimum training load required to obtain a beneficial adaptation profile is lacking. Therefore, the aim of this study was to determine the effects of resistance training at various external loads on extracellular Hsp70 (eHsp70) resting levels in older humans. METHODS: Fifty-six community-dwelling older (68±5years) volunteers were randomized to 12weeks of resistance training (3×/week) at either high-resistance (HIGH, 8 males, 10 females, 2×10-15 repetitions at 80%1RM), low resistance (LOW, 9 Males, 10 Females, 1×80-100 repetitions at 20%1RM), or mixed low resistance (LOW+, 9 Males, 10 Females, 1×60 repetitions at 20%1RM followed by 1×10-20 repetitions at 40%1RM)...
April 19, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28431408/the-effects-of-exercise-modality-during-additional-high-intensity-interval-training-upon-aerobic-fitness-and-strength-in-powerlifting-and-strongman-athletes
#2
Patroklos Androulakis-Korakakis, Louis Langdown, Adam Lewis, James Fisher, Paulo Gentil, Antonio Paoli, James Steele
Powerlifters and strongman athletes have a necessity for optimal levels of muscular strength whilst maintaining sufficient aerobic capacity to perform and recover between events. HIIT has been popularized for its efficacy in improving both aerobic fitness and strength but never assessed within the aforementioned population group. The present study looked to compare the effect of exercise modality, e.g. a traditional aerobic mode (AM), and strength mode, (SM), during HIIT upon aerobic fitness and strength. Sixteen well resistance trained male participants, currently competing in powerlifting and strongman events, completed 8 weeks of approximately effort- and volume-matched HIIT in 2 groups: AM (cycling, n=8) and SM (resistance training, n=8)...
April 21, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28415066/effect-of-barbell-weight-on-the-structure-of-the-flat-bench-press
#3
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/28399016/the-effects-of-beef-chicken-or-whey-protein-post-workout-on-body-composition-and-muscle-performance
#4
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/28394833/optimizing-half-squat-post-activation-potential-load-in-squat-jump-training-for-eliciting-relative-maximal-power-in-ski-jumpers
#5
A Gołaś, M Wilk, P Statsny, A Maszczyk, K Pajerska, A Zajac
Training load manipulation in a single workout session can increase or decrease training effectiveness in terms of athlete's strength or power gains. In ski jumping the complex training that elicits maximal power gains may take advantage of the post activation potentiation mechanism (PAP). The aim of research was to evaluate the changes in rate of force development (RFD), rate of power development (RPD) and jump height during a complex training session consisted of the barbell half squat (Sq) as an conditioning exercise with loads ranged between 60-100% of 1 repetition maximum (1RM), followed by a body weight squat jump (SqJ) as a performance task...
April 7, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28394832/strength-and-conditioning-training-by-the-danish-national-handball-team-prior-to-an-olympic-tournament
#6
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/28394830/the-one-repetition-maximum-mechanics-of-a-high-handle-hexagonal-bar-deadlift-compared-to-a-conventional-deadlift-as-measured-by-a-linear-position-transducer
#7
Robert G Lockie, Matthew R Moreno, Adrina Lazar, Fabrice G Risso, Tricia M Tomita, Alyssa A Stage, Samantha A Birmingham-Babauta, Ibett A Torne, John J Stokes, Dominic V Giuliano, DeShaun L Davis, Ashley J Orjalo, Samuel J Callaghan
The high-handle hexagonal bar deadlift (HHBD), a variation of the conventional deadlift (CD), is said to reduce the lift range of motion, which may change the mechanics of the lift. However, no research has investigated this. This study compared the mechanics between a one-repetition maximum (1RM) CD and HHBD. Thirty-one strength-trained subjects (21 males, 10 females) completed a 1RM CD and HHBD. A linear position transducer measured lift distance, duration, and work; and peak and mean power, velocity, and force...
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
#8
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/28387540/n-3-fatty-acid-supplementation-during-4-weeks-of-training-leads-to-improved-anaerobic-endurance-capacity-but-not-maximal-strength-speed-or-power-in-soccer-players
#9
Leyre Gravina, Frankie F Brown, Lee Alexander, James Dick, Gordon Bell, Oliver C Witard, Stuart D R Galloway
Omega-3 fatty acid (n-3 FA) supplementation could promote adaptation to soccer-specific training. We examined the impact of a 4 wk period of n-3 FA supplementation during training on adaptations in 1RM knee extensor strength, 20m sprint speed, vertical jump power, and anaerobic endurance capacity (Yo-Yo test) in competitive soccer players. Twenty six soccer players were randomly assigned to one of two groups: n-3 FA supplementation (n-3 FA; n=13) or placebo (n=13). Both groups performed two experimental trial days...
April 7, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28382551/high-doses-of-vitamin-c-plus-e-reduce-strength-training-induced-improvements-in-areal-bone-mineral-density-in-elderly-men
#10
Astrid Kamilla Stunes, Unni Syversen, Sveinung Berntsen, Gøran Paulsen, Tonje H Stea, Ken J Hetlelid, Hilde Lohne-Seiler, Mats Peder Mosti, Thomas Bjørnsen, Truls Raastad, Glenn Haugeberg
PURPOSE: Resistance training is beneficial for maintaining bone mass. We aimed to investigate the skeletal effects of high doses of antioxidants [vitamin C + E (α-tocopherol)] supplementation during 12-week supervised strength training in healthy, elderly men METHODS: Design: double-blinded randomized placebo-controlled study. Participants followed a supervised, undulating periodic exercise program with weekly adjusted load: 3 sessions/week and 3-15 repetitions maximum (RM) sets/exercise...
April 5, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28380132/kinetics-of-hypotension-during-50-sessions-of-resistance-and-aerobic-training-in-hypertensive-patients-a-randomized-clinical-trial
#11
Igor Rodrigues Damorim, Tony Meireles Santos, Gustavo Willames Pimentel Barros, Paulo Roberto Cavalcanti Carvalho
Background: Resistance and aerobic training are recommended as an adjunctive treatment for hypertension. However, the number of sessions required until the hypotensive effect of the exercise has stabilized has not been clearly established. Objective: To establish the adaptive kinetics of the blood pressure (BP) responses as a function of time and type of training in hypertensive patients. Methods: We recruited 69 patients with a mean age of 63...
March 30, 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28338528/perceptual-mechanical-and-electromyographic-responses-to-different-relative-loads-in-the-parallel-squat
#12
Mark Chapman, Eneko Larumbe-Zabala, Mark Gosss-Sampson, Mark Colpus, N Travis Triplett, Fernando Naclerio
The effectiveness of the OMNI-RES (0-10) and the electromyographic signal for monitoring changes in the movement velocity was examined during a set to muscular failure using different percentages of one repetition maximum (1RM) in the parallel squat exercise (PSQ). Twelve males (26.3 ± 5.8 years) were evaluated on eight separate days with 48 hours of rest between sessions. After determining the 1RM value, participants underwent seven tests until achieving muscular failure with the following percentage ranges: 30 to <40%; 40 to <50%, 50 to <60%, 60% to <70%, 70 to <80%, 80 to <90% and >90%...
March 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28338365/movement-velocity-as-indicator-of-relative-intensity-and-level-of-effort-attained-during-the-set-in-pull-up-exercise
#13
Miguel Sánchez-Moreno, David Rodríguez-Rosell, Fernando Pareja-Blanco, Ricardo Mora-Custodio, Juan José González-Badillo
PURPOSE: to analyze the relationship between movement velocity and relative load (%1RM) in the pull-up exercise (PU), and to determine the pattern of repetition velocity loss during a single set to failure in pulling one's own body mass. METHODS: Fifty-two men (age = 26.5 ± 3.9 years, body mass = 74.3 ± 7.2 kg) performed a first evaluation (T1) consisting of an one-repetition maximum test (1RM), and a test of maximum number of repetitions to failure pulling one's own body mass (MNR) in the PU exercise...
March 24, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28328719/predicting-the-maximum-dynamic-strength-in-bench-press-the-high-precision-of-the-bar-velocity-approach
#14
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/28327461/muscle-strength-is-impaired-in-men-but-not-in-women-living-with-hiv-taking-antiretroviral-therapy
#15
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/28326351/effects-of-low-dose-ibuprofen-supplementation-and-resistance-training-on-bone-and-muscle-in-postmenopausal-women-a-randomized-controlled-trial
#16
Whitney R D Duff, Saija A Kontulainen, Darren G Candow, Julianne J Gordon, Riley S Mason, Regina Taylor-Gjevre, Bindu Nair, Michael Szafron, Adam D G Baxter-Jones, Gordon A Zello, Philip D Chilibeck
PURPOSE: To compare the effects of nine months of exercise training and ibuprofen supplementation (given immeditately after exercise sessions) on bone and muscle in postmenopausal women. METHODS: In a double-blind randomized trial, participants (females: n = 90, mean age 64.8, SD 4.3 years) were assigned (computer generated, double blind) to receive supervised resistance training or stretching 3 days/week, and ibuprofen (400 mg, post-exercise) or placebo (i...
December 2016: Bone Reports
https://www.readbyqxmd.com/read/28301442/effect-of-ankle-mobility-and-segment-ratios-on-trunk-lean-in-the-barbell-back-squat
#17
Emil Isager Fuglsang, Anders Stampe Telling, Henrik Sørensen
The barbell back squat is a popular exercise used for both performance enhancing and rehabilitation purposes. However, injuries are common and people with a history of lower back pain are especially vulnerable. Past studies have shown that higher trunk angles (less forward lean) generate less stress on the lower back; thus, it seems appropriate to investigate the factors presumed to influence the trunk angle. Therefore, the aim in this study was to investigate how ankle mobility and the segment ratios between the thoracic spine, thighs and shanks influence the trunk angle in the back squat...
March 13, 2017: Journal of Strength and Conditioning Research
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
#18
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/28301435/different-cluster-sets-result-in-similar-metabolic-endocrine-and-perceptual-responses-in-trained-men
#19
James J Tufano, Jenny A Conlon, Sophia Nimphius, Jonathan M Oliver, Andreas Kreutzer, G Gregory Haff
The purpose of this study was to compare the kinematic, metabolic, endocrine, and perceptual responses of three back squat protocols with equal loads, number of repetitions, and total rest duration. Eight strength-trained men performed 36 back squats using 75% 1RM and 420 s of total rest during basic cluster sets of 4 (CS4), rest-redistribution sets of 4 (RR4), and rest-redistribution sets of 1 (RR1). Ratings of perceived exertion (RPE), blood lactate (La), mean velocity maintenance (MVM), and mean velocity loss (MVL) were measured during exercise...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28292885/heavy-strength-training-improves-running-and-cycling-performance-following-prolonged-submaximal-work-in-well-trained-female-athletes
#20
Olav Vikmoen, Bent R Rønnestad, Stian Ellefsen, Truls Raastad
The purpose of this study was to investigate the effects of adding heavy strength training to female duathletes' normal endurance training on both cycling and running performance. Nineteen well-trained female duathletes (VO2max cycling: 54 ± 3 ml∙kg(-1)∙min(-1), VO2max running: 53 ± 3 ml∙kg(-1)∙min(-1)) were randomly assigned to either normal endurance training (E, n = 8) or normal endurance training combined with strength training (E+S, n = 11). The strength training consisted of four lower body exercises [3 × 4-10 repetition maximum (RM)] twice a week for 11 weeks...
March 2017: Physiological Reports
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