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https://www.readbyqxmd.com/read/28937309/metabolic-and-hormonal-responses-to-different-resistance-training-systems-in-elderly-men
#1
Marcos R Paunksnis, Alexandre L Evangelista, Cauê V La Scala Teixeira, Gustavo Alegretti João, Rafael M Pitta, Angelica C Alonso, Aylton Figueira, Andrey Jorge Serra, Julien S Baker, Brad Jon Schoenfeld, Danilo S Bocalini
OBJECTIVE: To compare acute and sub-acute responses in hormonal profile and metabolic parameters in elderly people who participated in two methods of strength training (ST) with equalized loads. METHODS AND MATERIALS: A total of 12 elder individuals (65 ± 3 years) were randomly assigned to two training methods: constant intensity (CI, 3 sets of 10 repetitions with 75% of 1RM) and variable intensity (VI, 1st set: 12 repetitions at 67% of 1RM > 2nd set: 10 repetitions at 75% of 1RM and 3rd set: 8 repetitions at 80% of 1RM)...
September 22, 2017: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
https://www.readbyqxmd.com/read/28918362/there-are-no-no-responders-to-low-or-high-resistance-training-volumes-among-older-women
#2
Matheus de Siqueira Mendes Barbalho, Paulo Gentil, Mikel Izquierdo, James Fisher, James Steele, Rodolfo de Azevedo Raiol
OBJECTIVES: To assess the prevalence of non-responders to different tests and to compare the effects of different resistance training (RT) volumes on muscle strength, anthropometric and functional performance of older women. METHODS: Three hundred seventy six women performed 12weeks of RT with either low or high volume (LV, 71.29±5.77years and HV 69.73±5.88years, respectively). Both groups performed the same exercises, and all parameters were held constant except for the number of sets performed per week...
September 13, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28914426/resistance-training-status-modifies-inflammatory-response-to-explosive-and-hypertrophic-resistance-exercise-bouts
#3
Johanna K Ihalainen, Juha P Ahtiainen, Simon Walker, Gøran Paulsen, Harri Selänne, Mari Hämäläinen, Eeva Moilanen, Heikki Peltonen, Antti A Mero
The purpose of the present study was to examine the immediate and prolonged immune response in circulating cytokine and adipocytokine concentrations after two different resistance exercise bouts: hypertrophic (HYP1, 5 × 10, 80% of 1RM) and maximal explosive (POW1, 10 × 5, 60% of 1RM) resistance exercise bouts and how 12 weeks of resistance training (RT) modifies these responses (HYP2, POW2). Eight men completed the study. RE-induced interleukin-6 (IL-6), interleukin-1β (IL-1β), interleukin-1 receptor antagonist (IL-1ra), monocyte-chemoattractant protein-1 (MCP-1), leptin, resistin, and adiponectin were measured before (PRE) and immediately (POST0), 24 (POST24) and 48 (POST48) hours after RE bouts before and after RT...
September 15, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28912659/power-time-curve-comparison-between-weightlifting-derivatives
#4
Timothy J Suchomel, Christopher J Sole
This study examined the power production differences between weightlifting derivatives through a comparison of power-time (P-t) curves. Thirteen resistance-trained males performed hang power clean (HPC), jump shrug (JS), and hang high pull (HHP) repetitions at relative loads of 30%, 45%, 65%, and 80% of their one repetition maximum (1RM) HPC. Relative peak power (PPRel), work (WRel), and P-t curves were compared. The JS produced greater PPRel than the HPC (p < 0.001, d = 2.53) and the HHP (p < 0.001, d = 2...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912657/moderate-intensity-cycling-exercise-after-upper-extremity-resistance-training-interferes-response-to-muscle-hypertrophy-but-not-strength-gains
#5
Shigeto Tomiya, Naoki Kikuchi, Koichi Nakazato
The purpose of the present study was to examine the effect of 30-min moderate intensity cycling exercise immediately after upper-body resistance training on the muscle hypertrophy and strength gain. Fourteen subjects were randomly divided between two groups. One group performed moderate intensity (55% of maximum oxygen consumption [VO2max], 30 min) cycle training immediately after arm resistance training as concurrent training (CT; n = 7, age: 21.8 ± 0.7 years, height: 1.68 ± 0.06 m, weight: 60.3 ± 7.4 kg); the second group performed the same endurance and arm RT on separate days as control group (SEP; n=7, age: 22...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28912650/the-effects-combining-cryocompression-therapy-following-an-acute-bout-of-resistance-exercise-on-performance-and-recovery
#6
William H DuPont, Brek J Meuris, Vincent H Hardesty, Emily C Barnhart, Landon H Tompkins, Morricia J P Golden, Clayton J Usher, Paul A Spence, Lydia K Caldwell, Emily M Post, Matthew K Beeler, William J Kraemer
Compression and cold therapy used separately have shown to reduce negative effects of tissue damage. The combining compression and cold therapy (cryocompression) as a single recovery modality has yet to be fully examined. To examine the effects of cryocompression on recovery following a bout of heavy resistance exercise, recreationally resistance trained men (n =16) were recruited, matched, and randomly assigned to either a cryocompression group (CRC) or control group (CON). Testing was performed before and then immediately after exercise, 60 minutes, 24 hours, and 48 hours after a heavy resistance exercise workout (barbell back squats for 4 sets of 6 reps at 80% 1RM, 90 sec rest between sets, stiff legged deadlifts for 4 sets of 8 reps at 1...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28902119/determination-of-vertical-jump-as-a-measure-of-neuromuscular-readiness-and-fatigue
#7
Casey M Watkins, Saldiam R Barillas, Megan A Wong, David C Archer, Ian J Dobbs, Robert G Lockie, Jared W Coburn, Tai T Tran, Lee E Brown
Coaches closely monitor training loads and periodize sessions throughout the season to create optimal adaptations at the proper time. However, only monitoring training loads ignores the innate physiological stress each athlete feels individually. Vertical jump (VJ) is widely used as a measure of lower body power, and has been used in post-match studies to demonstrate fatigue levels. However, no pre-training monitoring via VJ performance has been previously studied. Therefore, the purpose of this study was to determine the sensitivity of VJ as a measure of readiness and fatigue on a daily sessional basis...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28902118/concurrent-training-followed-by-detraining-does-the-resistance-training-intensity-matter
#8
António C Sousa, Daniel A Marinho, Maria H Gil, Mikel Izquierdo, David Rodríguez-Rosell, Henrique P Neiva, Mário C Marques
The aim of the present study was to analyze the training and detraining effects of concurrent aerobic training and resistance training against three different external loads on strength and aerobic variables. Thirty-two men were randomly assigned to four groups: low-load (LLG, n=9), moderate-load (MLG, n=9), high-load (HLG, n=8), and control group (CG, n=6). Resistance training consisted of FS with a low-load (40-55% 1RM), a moderate-load (55-70% 1RM) or a high-load (70-85% 1RM) combined with jump and sprint exercises...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28895467/kinetic-and-kinematic-patterns-during-high-intensity-clean-movement-searching-for-optimal-load
#9
Achraf Ammar, Bryan L Riemann, Liwa Masmoudi, Marcel Blaumann, Osama Abdelkarim, Anita Hökelmann
The aim of the present study was to investigate loading effects on kinematic and kinetic variables among elite-weightlifters in order to identify an optimal training load to maximize power production for clean-movement. Nine elite-weightlifter (age: 24 ± 4years, body-mass: 77 ± 6.5kg, height: 176 ± 6.1cm and 1RM clean: 170 ± 5kg) performed 2 separate repetitions of the clean using 85, 90, 95% and 100%, in a randomized order, while standing on a force platform and being recorded using 3D-capture-system. Differences in kinematics (barbell displacement, velocity and acceleration) and kinetics (power, vertical ground reaction force (vGRF), rate of force development (RFD), and work) across the loads were statistically assessed...
September 12, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28889225/effects-of-blood-flow-restriction-during-moderate-intensity-eccentric-knee-extensions
#10
Michael Behringer, Lars Heinke, Jannik Leyendecker, Joachim Mester
We investigated if blood flow restriction (BFR, cuff pressure 20 mmHG below individual occlusion pressure) increases metabolic stress, hormonal response, release of muscle damage markers, and muscle swelling induced by moderate-intensity eccentric contractions. In a randomized, matched-pair design, 20 male subjects (25.3 ± 3.3 years) performed four sets of unilateral eccentric knee extensions (75% 1RM) to volitional failure with (IG) or without (CG) femoral BFR. Despite significant differences of performed repetitions between IG (85...
September 9, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28885389/load-velocity-relationship-in-variations-of-the-half-squat-exercise-influence-of-execution-technique
#11
Alejandro Pérez-Castilla, Amador García-Ramos, Paulino Padial, Antonio J Morales-Artacho, Belén Feriche
Previous studies have revealed that the velocity of the bar can be used to determine the intensity of different resistance training exercises. However, the load-velocity relationship seems to be exercise dependent. This study aimed to compare the load-velocity relationship obtained from two variations of the half-squat exercise (traditional vs. ballistic) using two execution techniques (eccentric-concentric vs. concentric-only). Twenty men performed a submaximal progressive loading test in four half-squat exercises: eccentric-concentric traditional-squat, concentric-only traditional-squat, countermovement jump (i...
September 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28873044/loaded-hip-thrust-based-pap-protocol-effects-on-acceleration-and-sprint-performance-of-handball-players
#12
Antonio Dello Iacono, Johnny Padulo, Laurent D Seitz
This study aimed to investigate the acute effects of two barbell hip thrust-based (BHT) post-activation potentiation (PAP) protocols on subsequent sprint performance. Using a crossover design, eighteen handball athletes performed maximal 15-m sprints before and 15s, 4min and 8min after two experimental protocols consisting of BHT loaded with either 50% or 85% 1RM (50PAP and 85PAP, respectively), in order to profile the transient PAP effects. The resulting sprint performances were significantly impaired at 15s only after the 85PAP protocol, which induced likely and very likely greater decreases compared to the 50PAP...
September 5, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28872384/feasibility-of-the-two-point-method-for-determining-the-one-repetition-maximum-in-the-bench-press-exercise
#13
Amador García-Ramos, Guy Gregory Haff, Francisco Luis Pestaña-Melero, Alejandro Pérez-Castilla, Francisco Javier Rojas, Carlos Balsalobre-Fernández, Slobodan Jaric
PURPOSE: This study compared the concurrent validity and reliability of previously proposed generalized group equations for estimating the bench press (BP) one-repetition maximum (1RM) with the individualized load-velocity relationship modelled with a two-point method. METHODS: Thirty men (BP 1RM relative to body mass: 1.08 0.18 kg·kg(-1)) performed two incremental loading tests in the concentric-only BP exercise and another two in the eccentric-concentric BP exercise to assess their actual 1RM and load-velocity relationships...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28859012/muscle-power-predicts-bone-strength-in-division-ii-athletes
#14
Vanessa R Yingling, Shannon Webb, Cathy Inouye, Jenny O, Jennifer J Sherwood
The relationship between muscle fitness measures and tibial bone strength in collegiate level athletes was investigated. Eighty-six Division II collegiate athletes (age: (18-29 years), height: 1.71 m (.09): mass: 66.7 kg (10.5) 56 female: 30 male) participated in this cross-sectional study. Maximum grip strength (GS), 1 repetition maximum leg press (1RM) and vertical jump peak power (PP) tests were measured. Cortical area (Ct.Ar), cortical bone mineral density (cBMD), moment of inertia (J) and bone strength (polar strength-strain index, SSIp) were measured using peripheral quantitative computed tomography (pQCT) at 50% tibia length...
August 29, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28858052/resistance-training-status-and-effectiveness-of-low-frequency-resistance-training-on-upper-body-strength-and-power-in-highly-trained-soccer-players
#15
Maxime Hertzog, Michael Clemens Rumpf, Karim Hader
Soccer is classified as a contact/collision sport with many player-to-player duels. Winning these duels, shielding the ball or fending off an opponent requires upper-body strength and power. Therefore this study aimed, a) to examine the time-related effect of an upper-body RT on maximal strength and power changes in highly trained soccer players, b) to investigate if the resistance-training (RT) status influences these changes throughout a competitive season. Twenty-eight soccer players participated in this study and were divided into an untrained (UG) and a trained (TG) group, according to their RT status...
August 26, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28838344/inflammatory-and-immune-responses-to-a-3-day-period-of-downhill-running-in-active-females
#16
S Jafariyan, A Monazzami, Z Nikosefat, M Nobahar, K Yari
Exercise-induced muscle damage (EIMD) is accompanied by inflammatory and immune responses. However, due to the repeated bout effect, there will probably be less EIMD. Hence, the purpose was to investigate inflammatory and immune responses over a three-day period of downhill running in active females. Eleven moderately trained healthy females performed three 60-minute bouts of downhill running in -13.5% grade, separated by 24 hours, at a speed eliciting 70-80% of their VO2peak on level grade. Delayed onset muscle soreness (DOMS), range of motion (ROM) and maximum knee isotonic strength (1RM) were measured pre- and two-hour post every bout...
August 15, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28835448/cyclical-blood-flow-restriction-resistance-exercise-a-potential-parallel-to-remote-ischemic-preconditioning
#17
Justin Daniel Sprick, Caroline A Rickards
Remote ischemic preconditioning (RIPC) is characterized by the cyclical application of limb blood flow restriction and reperfusion, and has been shown to protect vital organs during a subsequent ischemic insult. Blood flow restriction exercise (BFRE) similarly combines bouts of blood flow restriction with low-intensity exercise and thus could potentially emulate the protection demonstrated by RIPC. One concern with BFRE, however, is the potential for an augmented rise in sympathetic outflow, due to greater activation of the exercise pressor reflex...
August 23, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28834797/strength-and-hypertrophy-adaptations-between-low-versus-high-load-resistance-training-a-systematic-review-and-meta-analysis
#18
Brad J Schoenfeld, Jozo Grgic, Dan Ogborn, James W Krieger
The purpose of this paper was to conduct a systematic review of the current body of literature and a meta-analysis to compare changes in strength and hypertrophy between low- versus high-load resistance training protocols. Searches of PubMed/MEDLINE, Cochrane Library and Scopus were conducted for studies that met the following criteria: 1) an experimental trial involving both low- (≤60% 1 RM) and high- (>60% 1 RM) load training; 2) with all sets in the training protocols being performed to momentary muscular failure; 3) at least one method of estimating changes in muscle mass and/or dynamic, isometric or isokinetic strength was used; 4) the training protocol lasted for a minimum of 6 weeks; 5) the study involved participants with no known medical conditions or injuries impairing training capacity...
August 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28832392/ischemic-preconditioning-blunts-muscle-damage-responses-induced-by-eccentric-exercise
#19
Alexander Franz, Michael Behringer, Jan-Frieder Harmsen, Constantin Mayer, Rüdiger Krauspe, Christoph Zilkens, Moritz Schumann
PURPOSE: Ischemic preconditioning (IPC) is known to reduce muscle damage induced by ischemia and reperfusion-injury (I/R-Injury) during surgery. Due to similarities between the pathophysiological formation of I/R-injury and eccentric exercise-induced muscle damage (EIMD), as characterized by an intracellular accumulation of Ca, an increased production of reactive oxygen species and increased pro-inflammatory signaling, the purpose of the present study was to investigate whether IPC performed prior to eccentric exercise may also protect against EIMD...
August 22, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28821950/the-effects-of-supramaximal-versus-submaximal-intensity-eccentric-training-when-performed-until-volitional-fatigue
#20
Joel R Krentz, Philip D Chilibeck, Jonathan P Farthing
PURPOSE: Our purpose was to compare supramaximal versus submaximal intensity eccentric training performed until volitional fatigue. METHODS: Thirty-two young adults (19 males) were randomized into one of three groups: (1) ECC110 performed eccentric (ECC) only contractions at 110% of concentric (CON) 1-repetition maximum (1RM); (2) ECC80 performed ECC only contractions at 80% of CON 1RM; (3) a control group. Training progressed from 3 to 6 sets of unilateral ECC training of the elbow flexors over 8 weeks, with each set performed until volitional fatigue...
August 18, 2017: European Journal of Applied Physiology
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