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https://www.readbyqxmd.com/read/28651256/the-cardiovascular-and-perceptual-response-to-very-low-load-blood-flow-restricted-exercise
#1
Matthew B Jessee, Scott J Dankel, Samuel L Buckner, J Grant Mouser, Kevin T Mattocks, Jeremy P Loenneke
This study sought to compare cardiovascular and perceptual responses to blood flow restriction (BFR) exercise using various pressure and load combinations. Fourteen participants completed four sets of BFR elbow flexion using 10, 15 and 20% 1RM with 40 and 80% arterial occlusion pressure (AOP). AOP was measured before and after exercise. Perceived exertion (RPE) and discomfort were assessed before exercise and after each set. Data presented as mean (95% CI), except for RPE and discomfort: 25(th), 50(th), 75(th) percentiles...
June 26, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28640772/the-effect-of-a-carbohydrate-mouth-rinse-on-upper-body-muscular-strength-and-endurance
#2
James E Dunkin, Shaun M Phillips
Dunkin, JE and Phillips, SM. The effect of a carbohydrate mouth rinse on upper-body muscular strength and endurance. J Strength Cond Res 31(7): 1948-1953, 2017-Carbohydrate (CHO) mouth rinsing rapidly increases corticomotor output and maximal muscle force production, which could enhance muscular strength and endurance during resistance exercise. However, previous research has found no effect of CHO rinsing on muscular strength or endurance. The current study altered the CHO rinse composition and frequency and the muscular endurance test to further investigate the effects of a CHO mouth rinse on upper-body muscular strength and endurance...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28632056/reliability-of-power-and-velocity-variables-collected-during-the-traditional-and-ballistic-bench-press-exercise
#3
Amador García-Ramos, G Gregory Haff, Paulino Padial, Belén Feriche
This study aimed to examine the reliability of different power and velocity variables during the Smith machine bench press (BP) and bench press throw (BPT) exercises. Twenty-two healthy men conducted four testing sessions after a preliminary BP one-repetition maximum (1RM) test. In a counterbalanced order, participants performed two sessions of BP in one week and two sessions of BPT in another week. Mean propulsive power, peak power, mean propulsive velocity, and peak velocity at each tenth percentile (20-70% of 1RM) were recorded by a linear transducer...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28619770/return-to-work-of-cancer-patients-after-a-multidisciplinary-intervention-including-occupational-counselling-and-physical-exercise-in-cancer-patients-a-prospective-study-in-the-netherlands
#4
Monique C J Leensen, Iris F Groeneveld, Iris van der Heide, Tomas Rejda, Peter L J van Veldhoven, Sietske van Berkel, Aernout Snoek, Wim van Harten, Monique H W Frings-Dresen, Angela G E M de Boer
OBJECTIVES: To support return to work (RTW) among cancer patients, a multidisciplinary rehabilitation programme was developed which combined occupational counselling with a supervised physical exercise programme during chemotherapy. The aim was to investigate RTW rates of cancer patients and to evaluate changes in work-related quality of life and physical outcomes. DESIGN: Longitudinal prospective intervention study using a one-group design. SETTING: Two hospitals in the Netherlands...
June 15, 2017: BMJ Open
https://www.readbyqxmd.com/read/28618190/relation-between-upper-limb-muscle-strength-with-exercise-capacity-quality-of-life-and-dyspnea-in-patients-with-severe-chronic-obstructive-pulmonary-disease
#5
Dicle Kaymaz, İpek Çaylı Candemir, Pınar Ergün, Neşe Demir, Filiz Taşdemir, Pervin Demir
INTRODUCTION: In chronic obstructive pulmonary disease (COPD), skeletal muscle weakness is characterized by reduced muscle strength, reduced muscle endurance and the presence of muscle fatigue especially in lower limbs. There has been little research into the upper limb skeletal muscles. OBJECTIVES: In this study, we aimed to investigate the relation of upper limb muscle strength with pulmonary function, exercise capacity, quality of life (QoL) and dyspnea sensation...
June 15, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28617715/strength-and-muscular-adaptations-following-6-weeks-of-rest-pause-versus-traditional-multiple-sets-resistance-training-in-trained-subjects
#6
Jonato Prestes, Ramires Alsamir Tibana, Eduardo de Araujo Sousa, Dahan da Cunha Nascimento, Pollyanna de Oliveira Rocha, Nathalia Ferreira Camarço, Nuno Manuel Frade de Sousa, Jeffrey M Willardson
The purpose of the present study was to compare the longitudinal effects of six weeks of rest-pause versus traditional multiple-set RT on muscle strength, hypertrophy, localized muscular endurance, and body composition in trained subjects. Eighteen trained subjects (mean ± SD; age = 30.2 ± 6.6 years; weight = 74.8 ± 17.2 kg; height = 171.4 ± 10.3 cm) were randomly assigned to either a traditional multiple-set group (n = 9; 7 males and 2 females; 3 sets of 6 repetitions with 80% of 1-RM and 2 min rest intervals between sets) or a rest-pause group (n = 9; 7 males and 2 females)...
April 4, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28611677/greater-neural-adaptations-following-high-vs-low-load-resistance-training
#7
Nathaniel D M Jenkins, Amelia A Miramonti, Ethan C Hill, Cory M Smith, Kristen C Cochrane-Snyman, Terry J Housh, Joel T Cramer
We examined the neuromuscular adaptations following 3 and 6 weeks of 80 vs. 30% one repetition maximum (1RM) resistance training to failure in the leg extensors. Twenty-six men (age = 23.1 ± 4.7 years) were randomly assigned to a high- (80% 1RM; n = 13) or low-load (30% 1RM; n = 13) resistance training group and completed leg extension resistance training to failure 3 times per week for 6 weeks. Testing was completed at baseline, 3, and 6 weeks of training. During each testing session, ultrasound muscle thickness and echo intensity, 1RM strength, maximal voluntary isometric contraction (MVIC) strength, and contractile properties of the quadriceps femoris were measured...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28604135/adding-soy-protein-to-milk-enhances-the-effect-of-resistance-training-on-muscle-strength-in-postmenopausal-women
#8
Fábio L Orsatti, Nailza Maestá, Erick P de Oliveira, Jorge Nahas Neto, Roberto C Burini, Paulo R P Nunes, Aletéia P Souza, Fernanda M Martins, Eliana P Nahas
Resistance training (RT) and high-quality protein ingestion improves muscle mass (MM) and strength (MS). However, no study has evaluated the effect of ingesting milk plus soy protein (SOY) on MM and MS in postmenopausal women (PW). Thus, the aim of this study was to evaluate the effects of adding SOY to milk on MM and MS after 16 weeks of RT. Thirty-two PW were randomized and allocated into two groups: placebo and RT (PL+RT, n = 16) and SOY and RT (SOY+RT, n = 16). The SOY+RT received 25 g of SOY while the PL+RT received 25 g of maltodextrin (placebo)...
June 12, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28573973/knee-flexion-with-quadriceps-cocontraction-a-new-therapeutic-exercise-for-the-early-stage-of-acl-rehabilitation
#9
Andrea Biscarini, Samuele Contemori, Daniele Busti, Fabio M Botti, Vito E Pettorossi
Quadriceps strengthening exercises designed for the early phase of anterior cruciate ligament (ACL) rehabilitation should limit the anterior tibial translation developed by quadriceps contraction near full knee extension, in order to avoid excessive strain on the healing tissue. We hypothesize that knee-flexion exercises with simultaneous voluntary contraction of quadriceps (voluntary quadriceps cocontraction) can yield considerable levels of quadriceps activation while preventing the tibia from translating forward relative to the femur...
December 8, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28571696/functional-electrical-stimulation-improves-muscle-strength-and-endurance-in-patients-after-cardiac-surgery-a-randomized-controlled-trial
#10
Jociane Schardong, Gabriela Castro Kuinchtner, Graciele Sbruzzi, Rodrigo Della Méa Plentz, Antônio Marcos Vargas da Silva
BACKGROUND: Functional electrical stimulation (FES) has shown benefits in patients with chronic heart failure. Therefore, it is possible that FES can benefit patients similarly after cardiac surgery. OBJECTIVE: This randomized placebo-controlled trial aimed to evaluate the effects of FES on lower limb functional capacity, strength, endurance, and muscle mass after discharge from cardiac surgery. METHODS: Twenty patients were allocated (1:1) to the group receiving FES to the quadriceps (FESG) or FES placebo (FESPG)...
May 19, 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28557849/monitoring-resistance-exercise-intensity-via-rpe-in-previously-untrained-patients-with-prostate-cancer-undergoing-androgen-deprivation-therapy
#11
C M Fairman, R L LaFountain, A R Lucas, B C Focht
Exercise has been shown to be safe and effective for prostate cancer (PrCa) patients. The monitoring of resistance exercise (RE) intensity is an emerging area of interest in RE prescription. Rating of perceived exertion (RPE) is one of the most commonly used methods, but has not yet been validated in this population. Thus, the purpose of this study was to examine the relationship between RPE and RE intensity in PrCa. Data for this study were abstracted from baseline upper and lower body strength assessments from two previous trials (IDEA-P; Livestrong) in our laboratory investigating functional outcomes in PrCa patients undergoing androgen deprivation therapy (ADT)...
May 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28555098/hemodynamic-response-alterations-in-sensorimotor-areas-as-a-function-of-barbell-load-levels-during-squatting-an-fnirs-study
#12
Rouven Kenville, Tom Maudrich, Daniel Carius, Patrick Ragert
Functional near-infrared spectroscopy (fNIRS) serves as a promising tool to examine hemodynamic response alterations in a sports-scientific context. The present study aimed to investigate how brain activity within the human motor system changes its processing in dependency of different barbell load conditions while executing a barbell squat (BS). Additionally, we used different fNIRS probe configurations to identify and subsequently eliminate potential exercise induced systemic confounders such as increases in extracerebral blood flow...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28546738/kinematic-and-electromyographic-activity-changes-during-back-squat-with-submaximal-and-maximal-loading
#13
Hasan U Yavuz, Deniz Erdag
The aim of this study was to investigate the possible kinematic and muscular activity changes with maximal loading during squat maneuver. Fourteen healthy male individuals, who were experienced at performing squats, participated in this study. Each subject performed squats with 80%, 90%, and 100% of the previously established 1 repetition maximum (1RM). Electromyographic (EMG) activities were measured for the vastus lateralis, vastus medialis, rectus femoris, semitendinosus, biceps femoris, gluteus maximus, and erector spinae by using an 8-channel dual-mode portable EMG and physiological signal data acquisition system (Myomonitor IV, Delsys Inc...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/28538309/relative-load-prediction-by-velocity-and-the-omni-res-0-10-scale-in-parallel-squat
#14
Fernando Naclerio, Eneko Larumbe-Zabala
Naclerio, F and Larumbe-Zabala, E. Relative load prediction by velocity and the OMNI-RES 0-10 scale in parallel squat. J Strength Cond Res 31(6): 1585-1591, 2017-This study analyzed the possibility of using movement velocity and the rate of perceived exertion as predictors of relative load in the parallel squat (PSQ) exercise. To determine the full load-velocity and load-rate of perceived exertion relationships, 290 young, resistance-trained athletes (209 males and 81 females) performed a progressive strength test up to the 1 repetition maximum...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538307/can-cold-water-immersion-enhance-recovery-in-elite-olympic-weightlifters-an-individualized-perspective
#15
Jan Schimpchen, Maximilian Wagner, Alexander Ferrauti, Michael Kellmann, Mark Pfeiffer, Tim Meyer
We investigated whether cold water immersion (CWI) after intensive training sessions can enhance recovery in elite Olympic weightlifters, taking into account each athlete's individual response pattern. The entire German male Olympic weightlifting national team participated in the study (n = 7), ensuring collection of data from elite athletes only. Using a randomized cross-over design, the athletes went through 2 high-intensity training microcycles consisting of 5 training sessions that were either followed by a CWI or passive recovery...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538294/effects-of-different-combinations-of-strength-power-and-plyometric-training-on-the-physical-performance-of-elite-young-soccer-players
#16
Ronaldo Kobal, Irineu Loturco, Renato Barroso, Saulo Gil, Rogério Cuniyochi, Carlos Ugrinowitsch, Hamilton Roschel, Valmor Tricoli
The combination of strength (ST) and plyometric training (PT) has been shown to be effective for improving sport-specific performance. However, there is no consensus about the most effective way to combine these methods in the same training session to produce greater improvements in neuromuscular performance of soccer players. Thus, the purpose of this study was to compare the effects of different combinations of ST and PT sequences on strength, jump, speed, and agility capacities of elite young soccer players...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28537195/caffeine-ingestion-acutely-enhances-muscular-strength-and-power-but-not-muscular-endurance-in-resistance-trained-men
#17
Jozo Grgic, Pavle Mikulic
The goal of this randomized, double-blind, cross-over study was to assess the acute effects of caffeine ingestion on muscular strength and power, muscular endurance, rate of perceived exertion (RPE), and pain perception (PP) in resistance-trained men. Seventeen volunteers (mean ± SD: age = 26 ± 6 years, stature = 182 ± 9 cm, body mass = 84 ± 9 kg, resistance training experience = 7 ± 3 years) consumed placebo or 6 mg kg(-1) of anhydrous caffeine 1 h before testing...
May 24, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28532248/effects-of-drop-sets-with-resistance-training-on-increases-in-muscle-csa-strength-and-endurance-a-pilot-study
#18
Hayao Ozaki, Atsushi Kubota, Toshiharu Natsume, Jeremy P Loenneke, Takashi Abe, Shuichi Machida, Hisashi Naito
To investigate the effects of a single high-load (80% of one repetition maximum [1RM]) set with additional drop sets descending to a low-load (30% 1RM) without recovery intervals on muscle strength, endurance, and size in untrained young men. Nine untrained young men performed dumbbell curls to concentric failure 2-3 days per week for 8 weeks. Each arm was randomly assigned to one of the following three conditions: 3 sets of high-load (HL, 80% 1RM) resistance exercise, 3 sets of low-load [LL, 30% 1RM] resistance exercise, and a single high-load (SDS) set with additional drop sets descending to a low-load...
May 22, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28530475/a-novel-electromyographic-approach-to-estimate-fatigue-threshold-in-maximum-incremental-strength-tests
#19
Jerónimo Aragón-Vela, Yaira Barranco-Ruiz, Cristina Casals, Julio Plaza-Díaz, Rafael A Casuso, Luis Fontana, Jesus R Huertas
Evaluation of muscular fatigue thresholds in athletes performing short-duration and explosive exercises is difficult due to the fact that classic parameters do not suffer large variations. Therefore, the aim of this study was to develop a new method to estimate the fatigue threshold in single muscles. Our approach is based on electromyographic data recorded during a maximun incremental strength test until the one repetition maximum (1RM) is reached. Ten men and ten women performed a half-squat strength test consisting of five incremental intensities of 1RM...
May 22, 2017: Motor Control
https://www.readbyqxmd.com/read/28530448/carbohydrates-alone-or-mixing-with-beef-or-whey-protein-promote-similar-training-outcomes-in-resistance-training-males-a-double-blind-randomized-controlled-clinical-trial
#20
Fernando Naclerio, Marco Seijo-Bujia, Eneko Larumbe-Zabala, Conrad P Earnest
Beef powder is a new high-quality protein source scarcely researched relative to exercise performance. The present study examined the impact of ingesting hydrolyzed beef protein, whey protein, and carbohydrate on strength performance (1RM), body composition (via plethysmography), limb circumferences and muscular thickness (via ultrasonography), following an 8-week resistance-training program. After being randomly assigned to one of the following groups: Beef, Whey, or Carbohydrate, twenty four recreationally physically active males (n=8 per treatment) ingested 20 g of supplement, mixed with orange juice, once a day (immediately after workout or before breakfast)...
May 22, 2017: International Journal of Sport Nutrition and Exercise Metabolism
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