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"resistance training"

Jonathan S Howard, Cherilyn N McLester, Thomas W Evans, John R McLester, Jimmy P Calloway
The PhysioFlow™ is a piece of equipment that uses bioimpedance cardiography to measure central hemodynamics. The purpose of this research was to explore the novel approach of monitoring central hemodynamics during free weight resistance exercise using bioimpedance cardiography throughout a 5 repetition maximum (5RM). Thirty participants ranging from beginner to advanced lifters (16 males and 14 females) completed a 5RM for back squat, seated push press, and bicep curl while connected to the PhysioFlow™ to assess the response of heart rate (HR), stroke volume (SV), cardiac output (Q), and ejection fraction (EF)...
2018: International Journal of Exercise Science
Graham P Holloway, Andrew M Holwerda, Paula M Miotto, Marlou L Dirks, Lex B Verdijk, Luc J C van Loon
It remains unknown if mitochondrial bioenergetics are altered with aging in humans. We established an in vitro method to simultaneously determine mitochondrial respiration and H2 O2 emission in skeletal muscle tissue across a range of biologically relevant ADP concentrations. Using this approach, we provide evidence that, although the capacity for mitochondrial H2 O2 emission is not increased with aging, mitochondrial ADP sensitivity is impaired. This resulted in an increase in mitochondrial H2 O2 and the fraction of electron leak to H2 O2 , in the presence of virtually all ADP concentrations examined...
March 13, 2018: Cell Reports
Kirk B Roberson, Melanie Potiaumpai, Kayla Widdowson, Annmarie Jaghab, Sean Chowdhari, Catherine Armitage, Afton D Seeley, Kevin A Jacobs, Joseph F Signorile
The presence of cardiometabolic syndrome (CMS) infers an increased risk for cardiovascular incidence and mortality, and is associated with reduced health-related quality of life (HRQoL). Although the effects of exercise on biomarkers, HRQoL, and future risk have been studied; no study has measured the effects on all three components. The present study compared the effects of steady-state, moderate-intensity treadmill training (TM) and high-velocity circuit resistance training (HVCRT) on biological markers, HRQoL, and overall CVD risk in adults with CMS and CVD risk factors...
March 14, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
Bunny J Pozehl, Rita Mcguire, Kathleen Duncan, Melody Hertzog, Pallav Deka, Joseph Norman, Nancy T Artinian, Matthew A Saval, Steven J Keteyian
BACKGROUND: Few studies report objective accelerometer-measured daily physical activity levels in patients with heart failure (HF). OBJECTIVE: We examined baseline accelerometer-measured physical activity from the Heart Failure Exercise and Resistance Training Camp trial, a federally funded (R01-HL112979) 18-month intervention study to promote adherence to exercise in patients with HF. Factors associated with physical activity levels were also explored. METHODS: Patients with diagnosed HF (stage C chronic HF confirmed by echocardiography and clinical evaluation) were recruited from 2 urban medical centers...
March 12, 2018: Journal of Cardiovascular Nursing
Harry M Roberts, Jonathan P Moore, Jeanette M Thom
PURPOSE: To compare the serum cartilage oligomeric matrix protein (COMP) and hyaluronan (HA) response to walking (high-repetition loading) and resistance training exercise (low-repetition loading) in males and females. METHODS: 15 males (age: 28 ± 6 years; BMI: 24 ± 2; mean ± SD) and 15 females (age: 26 ± 4 years; BMI: 23 ± 2) completed both a 40-min walk at 80% of maximum heart rate and a 40-min lower body resistance training protocol, separated by a minimum of 48 h...
March 13, 2018: European Journal of Applied Physiology
Fabiano F Lima, Carlos A Camillo, Luis A Gobbo, Iara B Trevisan, Wesley B B M Nascimento, Bruna S A Silva, Manoel C S Lima, Dionei Ramos, Ercy M C Ramos
The objectives of the study were to compare the effects of resistance training using either a low cost and portable elastic tubing or conventional weight machines on muscle force, functional exercise capacity, and health-related quality of life (HRQOL) in middle-aged to older healthy adults. In this clinical trial twenty-nine middle-aged to older healthy adults were randomly assigned to one of the three groups a priori defined: resistance training with elastic tubing (ETG; n = 10), conventional resistance training (weight machines) (CTG; n = 9) and control group (CG, n = 10)...
March 2018: Journal of Sports Science & Medicine
Summer B Cook, Brendan R Scott, Katherine L Hayes, Bethany G Murphy
Low-load blood flow restricted (BFR) resistance exercise has been suggested to be as effective as moderate and high-load resistance training for increasing muscle size and strength. The purpose of the study was to evaluate the effects of 6 weeks of HL or low-load BFR resistance training on neuromuscular function, strength, and hypertrophy of the knee extensors. Eighteen participants aged 18-22 years old were randomized to one of three training groups: moderate load (ML: 70% of 1 repetition maximum [1-RM]); BFR (20% 1-RM with a vascular restriction set to ~180 mmHg); and a control group (CON) that did not exercise...
March 2018: Journal of Sports Science & Medicine
Mathias T Vangsoe, Malte S Joergensen, Lars-Henrik L Heckmann, Mette Hansen
During prolonged resistance training, protein supplementation is known to promote morphological changes; however, no previous training studies have tested the effect of insect protein isolate in a human trial. The aim of this study was to investigate the potential effect of insect protein as a dietary supplement to increase muscle hypertrophy and strength gains during prolonged resistance training in young men. Eighteen healthy young men performed resistance training four day/week for eight weeks. Subjects were block randomized into two groups consuming either an insect protein isolate or isocaloric carbohydrate supplementation within 1 h after training and pre-sleep on training days...
March 10, 2018: Nutrients
Brad Jon Schoenfeld, Andrew Vigotsky, Bret Contreras, Sheona Golden, Andrew Alto, Rachel Larson, Nick Winkelman, Antonio Paoli
The purpose of this study was to investigate the effects of using an internal versus external focus of attention during resistance training on muscular adaptations. Thirty untrained college-aged men were randomly assigned to an internal focus group (INTERNAL) that focused on contracting the target muscle during training (n = 15) or an external focus group (EXTERNAL) that focused on the outcome of the lift (n = 15). Training for both routines consisted of 3 weekly sessions performed on non-consecutive days for 8 weeks...
March 13, 2018: European Journal of Sport Science
Caoileann H Murphy, Mahalakshmi Shankaran, Tyler A Churchward-Venne, Cameron J Mitchell, Nathan M Kolar, Louise M Burke, John A Hawley, Amira Kassis, Leonidas G Karagounis, Kelvin Li, Chelsea King, Marc Hellerstein, Stuart M Phillips
We determined how the pattern of protein intake and resistance training (RT) influenced longer-term (2-wk) integrated myofibrillar protein synthesis (MyoPS) during energy restriction (ER). MyoPS and proteome kinetics were measured during 2-wk of ER alone and 2-wk of ER plus RT (ER + RT) in overweight/obese older men. Participants were randomized to consume dietary protein in a balanced (BAL: 25% daily protein/meal x 4 meals) or skewed (SKEW: 7:17:72:4% daily protein/meal) pattern (n = 10/group). Participants ingested D2 O during the consecutive 2-wk periods, and skeletal muscle biopsies and serum were obtained at the beginning and conclusion of ER and ER + RT...
March 12, 2018: Journal of Physiology
Rahman Rahimi
AIM: The purpose of this study was to examine the effect of CYP1A2 -163C>A polymorphism on the ergogenic effects of caffeine supplementation during a resistance exercise (RE) session. METHODS: In a randomized, double-blind, placebo (PL)-controlled, crossover study, 30 resistance-trained men took part in two RE sessions (three sets to failure at 85% of one repetition maximum, 2-min rest between sets), including bench press (BP), leg press (LP), seated cable row, and shoulder press (SP) following caffeine (CAF) (6 mg kg-1 ) or PL (6 mg kg-1 of maltodextrin) ingestion 1 h prior to the trial...
March 12, 2018: Irish Journal of Medical Science
Sara Abolahrari-Shirazi, Javad Kojuri, Zahra Bagheri, Zahra Rojhani-Shirazi
Background: This study aimed to compare the effects of combined endurance-resistance training (CT) versus endurance training (ET) on some cardiovascular markers in patients with heart failure after percutaneous coronary intervention (PCI). Materials and Methods: The study applied a randomized, controlled design in which 75 patients with heart failure who had undergone PCI were randomly assigned to one of three groups: ET, CT, and control. The ET group performed ET for 45 min, three times a week for 7 weeks...
2018: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
Felipe Alves Brigatto, Tiago Volpi Braz, Thamires Cristina da Costa Zanini, Moisés Diego Germano, Marcelo Saldanha Aoki, Brad Jon Schoenfeld, Paulo Henrique Marchetti, Charles Ricardo Lopes
The purpose of this study was to investigate the chronic effects of training muscle groups 1 day per week vs. 2 days per week on neuromuscular performance and morphological adaptations in trained men with the number of sets per muscle group equated between conditions. Participants were randomly assigned in 2 experimental groups: 1 session·wk per muscle group (G1, n = 10), where every muscle group was trained once a week with 16 sets or 2 sessions·wk per muscle group (G2, n = 10), where every muscle group was trained twice a week with 8 sets per session...
March 6, 2018: Journal of Strength and Conditioning Research
Samuel T Orange, Phil Marshall, Leigh A Madden, Rebecca V Vince
This study compared the effects of a 4-week supervised (SUP) and unsupervised (UNSUP) resistance training programme followed by 12 weeks of detraining (DET). Thirty-six healthy aging adults (age: 53.6 ± 3.6 years; body mass index: 28.3 ± 5.1 kg/m) were randomly allocated to a SUP group (n = 17) or an UNSUP group (n = 19). Participants completed three training sessions per week using resistance bands and body weight movements. Measures of physical performance were administered at baseline, at the end of the training programme, and after the DET period...
March 6, 2018: Journal of Strength and Conditioning Research
Roger L Hammer, Joshua T Linton, Adam M Hammer
The purpose of this investigation was to determine maximal strength and jump performance outcomes of heavy squat training on a low-amplitude (<1.0 mm peak-to-peak) vibration platform (VP). Nineteen recreationally resistance-trained college-aged men (22.3 ± 1.66 years) completed the 6-week study. Participants were randomly assigned to one of two training groups: SQT (n = 10) performed conventional back squats on the floor; SQTV (n = 9) performed back squats on the VP. Supervised training took place over 12 sessions (2 days/week) which utilized an aggressive strength development protocol (85-95 % 1-RM), which was identically followed by both groups...
March 6, 2018: Journal of Strength and Conditioning Research
Sandro Bartolomei, Federico Nigro, Sandro Ruggeri, Ivan Malagoli Lanzoni, Simone Ciacci, Franco Merni, Eliahu Sadres, Jay R Hoffman, Gabriele Semprini
The purpose of the present study was to validate the ballistic push-up test performed with hands on a force plate (BPU) as a method to measure upper-body power. Twenty-eight experienced resistance trained men (age = 25.4 ± 5.2 y; body mass = 78.5 ± 9.0 kg; body height = 179.6 ± 7.8 cm) performed, two days apart, a bench press 1RM test and upper-body power tests. Mean power and peak power were assessed using the bench press throw test (BT) and the BPU test performed in randomized order. The area under the force/power curve (AUC) obtained at BT was also calculated...
March 6, 2018: Journal of Strength and Conditioning Research
Ryan J Colquhoun, Mitchel A Magrini, Cody T Haun, Tyler W D Muddle, Patrick M Tomko, Micheal J Luera, Cameron S Mackey, Christopher G Vann, Jeffrey S Martin, Kaelin C Young, Jason M DeFreitas, Michael D Roberts, Nathaniel D M Jenkins
Previous investigations have reported a relationship between skeletal muscle phenotype and motor unit (MU) firing parameters during submaximal contractions. The purpose of the current investigation, however, was to examine the relationships between motor unit firing behavior during a maximal voluntary contraction, Myosin Heavy Chain (MHC) isoform content, and various molecular neuromuscular targets of the vastus lateralis (VL) muscle in resistance-trained men. Ten resistance-trained males completed a trapezoidal ramp contraction up to 100% of their maximal voluntary isometric strength (MVIC)...
March 2018: Physiological Reports
Agathe D Jadczak, Naresh Makwana, Natalie Luscombe-Marsh, Renuka Visvanathan, Timothy J Schultz
OBJECTIVES: This umbrella review aimed to determine the effectiveness of exercise interventions, alone or in combination with other interventions, in improving physical function in community-dwelling older people identified as pre-frail or frail. INTRODUCTION: Exercise is said to have a positive impact on muscle mass and strength which improves physical function and hence is beneficial for the treatment of frailty. Several systematic reviews discuss the effects of exercise interventions on physical function parameters, such as strength, mobility, gait, balance and physical performance, and indicate that multi-component exercise, including resistance, aerobic, balance and flexibility training, appears to be the best way in which to improve physical function parameters in frail older people...
March 2018: JBI Database of Systematic Reviews and Implementation Reports
Keith Pfannenstiel, Reid Hayward
Though highly effective, doxorubicin (DOX) use is limited by a dose-dependent cardiotoxicity. The purpose of the study was to determine whether resistance training (RT) would protect against DOX-induced cardiac dysfunction and determine if any observed functional preservation is a result of reduced lipid peroxidation or a preservation of the cardiac myosin heavy chain (MHC) isoform distribution. Rats were resistance trained or remained sedentary (SED) for 12 weeks, then treated with 12.5 mg/kg DOX or 0.9% saline...
February 28, 2018: Journal of Cardiovascular Pharmacology
Marzena Barczuk-Falęcka, Łukasz A Małek, Hubert Krysztofiak, Danuta Roik, Michał Brzewski
Physical training is associated with changes in cardiac morphology called the "athlete's heart", which has not been sufficiently studied in children. The aim of the study was to analyze cardiac adaptation to exercise in pre-adolescent soccer players. Thirty-six soccer players (mean age 10.1 ± 1.4 years) and 24 non-athlete male controls (10.4 ± 1.7 years) underwent cardiac magnetic resonance. Measurements of myocardial mass, end-diastolic and end-systolic volume, stroke volume and ejection fraction for left and right ventricle (LV, RV) were performed...
March 8, 2018: Pediatric Cardiology
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