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https://www.readbyqxmd.com/read/29526840/feasibility-of-high-intensity-training-in-nonspecific-chronic-low-back-pain-a-clinical-trial
#1
Jonas Verbrugghe, Anouk Agten, Bert O Eijnde, Enzo Olivieri, Xavier Huybrechts, Henk Seelen, Frank Vandenabeele, Annick Timmermans
BACKGROUND: Although low to moderate intensity exercise therapy is a predominant part of rehabilitation in nonspecific chronic low back pain (NSCLBP), effect sizes are small and optimal exercise modalities/intensities are unclear. Conversely, effects of high intensity training have not yet been investigated in this population. OBJECTIVE: The aim of this study is to investigate the feasibility of high intensity training (HIT) and to explore the magnitude of the effects of a HIT program on exercise capacity and disease related outcome measures compared to conventional therapy for persons with NSCLBP...
March 2, 2018: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29489727/high-frequency-resistance-training-is-not-more-effective-than-low-frequency-resistance-training-in-increasing-muscle-mass-and-strength-in-well-trained-men
#2
Gederson K Gomes, Cristiane M Franco, Paulo Ricardo P Nunes, Fábio L Orsatti
We studied the effects of two different weekly frequency resistance training (RT) protocols over eight weeks on muscle strength and muscle hypertrophy in well-trained men. Twenty-three subjects (age: 26.2±4.2 years; RT experience: 6.9±3.1 years) were randomly allocated into the two groups: low frequency (LFRT, n = 12) or high frequency (HFRT, n = 11). The LFRT performed a split-body routine, training each specific muscle group once a week. The HFRT performed a total-body routine, training all muscle groups every session...
February 27, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29474863/attenuated-strength-gains-during-prolonged-resistance-exercise-training-in-older-adults-with-high-inflammatory-status
#3
Roland W J Hangelbroek, Pim Knuiman, Michael Tieland, Lisette C P G M de Groot
OBJECTIVES: Chronic systemic low grade inflammation is associated with the age-related loss of muscle mass. Resistance exercise has been suggested to reduce or lower chronic systemic low grade inflammation. However, systemic chronic low-grade inflammation may adversely affect the adaptive response to exercise training. We investigated the effect of resistance exercise training on systemic chronic low-grade inflammation in older adults. In addition, we studied the association between systemic chronic low-grade inflammation and the adaptive response to exercise training...
June 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29370260/muscle-strength-and-regional-lean-body-mass-influence-on-mineral-bone-health-in-young-male-adults
#4
Bianca Rosa Guimarães, Luciana Duarte Pimenta, Danilo Alexandre Massini, Daniel Dos Santos, Leandro Oliveira da Cruz Siqueira, Astor Reis Simionato, Luiz Gustavo Almeida Dos Santos, Cassiano Merussi Neiva, Dalton Muller Pessôa Filho
The relationship between muscle strength and bone mineral content (BMC) and bone mineral density (BMD) is supposed from the assumption of the mechanical stress influence on bone tissue metabolism. However, the direct relationship is not well established in younger men, since the enhancement of force able to produce effective changes in bone health, still needs to be further studied. This study aimed to analyze the influence of muscle strength on BMC and BMD in undergraduate students. Thirty six men (24.9 ± 8...
2018: PloS One
https://www.readbyqxmd.com/read/29324578/training-volume-not-frequency-indicative-of-maximal-strength-adaptations-to-resistance-training
#5
Ryan J Colquhoun, Christopher M Gai, Danielle Aguilar, Daniel Bove, Jeffrey Dolan, Andres Vargas, Kaylee Couvillion, Nathaniel D M Jenkins, Bill I Campbell
PURPOSE: To compare the effects of a high- versus a moderate-training frequency on maximal strength and body composition. METHODS: 28 young, healthy resistance-trained males were randomly assigned to either: 3x/week (3x; n=16) or 6x/week (6x; n=12). Dependent variables (DVs) assessed at baseline and after the 6-week training intervention included: squat 1RM (SQ1RM), bench press 1RM (BP1RM), deadlift 1RM (DL1RM), powerlifting total (PLT), Wilk's coefficient (WC), fat-free mass (FFM) and fat mass (FM)...
January 5, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29120983/assessing-differences-in-anthropometric-and-fitness-characteristics-between-police-academy-cadets-and-incumbent-officers
#6
Robin Orr, J Jay Dawes, Rodney Pope, Joseph Terry
The physical fitness of police officers must be developed in new cadets and sustained in incumbent officers. The aims of this study were to profile and compare the anthropometric and fitness characteristics of police academy cadets and incumbent officers of varying ages from a single police force. Retrospective data for 84 police academy cadets (♂=66, mean age=27.96±5.73 yrs; ♀=18, mean age=30.50±5.76 yrs) and 80 incumbent police officers (♂=73, mean age=39.43±8.28 yrs; ♀=7, mean age=37.86±3.67 yrs) were compiled...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29053943/inflammation-status-of-healthy-young-men-initial-and-specific-responses-to-resistance-training
#7
Johanna K Ihalainen, Heikki Peltonen, Göran Paulsen, Juha P Ahtiainen, Ritva S Taipale, Mari Hämäläinen, Eeva Moilanen, Antti A Mero
Our primary aim was to study the effects of a 4-week preparatory resistance-training (RT) period followed by 12 weeks of 2 specific RT protocols (either hypertrophic-strength (HS) or strength-hypertrophy-power training) on inflammation markers and the possible relationship of the changes in abdominal fat and lean mass to the changes in inflammation status. A total of 82 healthy men were included in the study. Maximal concentric leg press strength (1-repetition maximum), total body lean mass, total body and abdominal fat mass, circulating high-sensitivity C-reactive protein, interleukin-6, interleukin-1 receptor antagonist (IL-1ra), monocyte chemoattractant protein 1 (MCP-1), and selected adipocytokines (resistin, adiponectin, and leptin) concentrations were measured before and after 4 (wk4) and 16 weeks (wk16) of RT...
March 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29016481/auto-regulated-exercise-selection-training-regimen-produces-small-increases-in-lean-body-mass-and-maximal-strength-adaptations-in-strength-trained-individuals
#8
Jacob T Rauch, Carlos Ugrinowitsch, Christopher I Barakat, Michael R Alvarez, David L Brummert, Daniel W Aube, Andrew S Barsuhn, Daniel Hayes, Valmor Tricoli, Eduardo O De Souza
The purpose of this investigation was to compare the effects of auto-regulatory exercise selection (AES) vs. fixed exercise selection (FES) on muscular adaptations in strength-trained individuals. Seventeen males (Mean ± SD; age = 24 ± 5.45 years; height = 180.3 ± 7.54cm, lean body mass [LBM] 66.44 ± 6.59kg; squat and bench press 1RM: body mass ratio 1.87, 1.38 respectively) were randomly assigned into either AES or FES. Both groups trained three times a week for 9 weeks. AES self-selected the exercises for each session, whereas FES was required to perform exercises in a fixed order...
October 7, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28719669/a-whey-protein-based-multi-ingredient-nutritional-supplement-stimulates-gains-in-lean-body-mass-and-strength-in-healthy-older-men-a-randomized-controlled-trial
#9
RANDOMIZED CONTROLLED TRIAL
Kirsten E Bell, Tim Snijders, Michael Zulyniak, Dinesh Kumbhare, Gianni Parise, Adrian Chabowski, Stuart M Phillips
Protein and other compounds can exert anabolic effects on skeletal muscle, particularly in conjunction with exercise. The objective of this study was to evaluate the efficacy of twice daily consumption of a protein-based, multi-ingredient nutritional supplement to increase strength and lean mass independent of, and in combination with, exercise in healthy older men. Forty-nine healthy older men (age: 73 ± 1 years [mean ± SEM]; BMI: 28.5 ± 1.5 kg/m2) were randomly allocated to 20 weeks of twice daily consumption of either a nutritional supplement (SUPP; n = 25; 30 g whey protein, 2...
2017: PloS One
https://www.readbyqxmd.com/read/28699923/the-effects-of-moderate-versus-high-load-resistance-training-on-muscle-growth-body-composition-and-performance-in-collegiate-women
#10
Jason M Cholewa, Fabricio E Rossi, Christopher MacDonald, Amy Hewins, Samantha Gallo, Ashley Micenski, Layne Norton, Bill I Campbell
Twenty young women (20.3+1.5 years, 164+6 cm, 68.7+13.8 kg) without prior structured resistance training experience were recruited for this study. Body composition (BodPod), compartmental water (Bioelectrical Impedance), 7-site skinfold, and arm and thigh CSA were assessed pre- and post- 8 week training. Performance testing consisted of vertical jump, 3 kg chest pass initial velocity, squat 1RM and overhead press 1RM. Following 2 weeks of familiarization training, subjects were matched for body composition and relative squat strength, and randomly assigned to either a high- (HL: n=10; 4 sets of 5-7 repetitions) or moderate-load (ML: n=10; 2 sets of 10-14 repetitions) group that completed 6-7 exercises per day performed to momentary muscular failure...
June 2, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28527156/the-effect-of-aerobic-or-aerobic-strength-exercise-on-body-composition-and-functional-capacity-in-patients-with-bmi-%C3%A2-35-after-bariatric-surgery-a-randomized-control-trial
#11
Alireza Hassannejad, Alireza Khalaj, Mohammad Ali Mansournia, Mastaneh Rajabian Tabesh, Zahra Alizadeh
BACKGROUND: Although previous studies suggested that bariatric surgery is the most effective and sustainable treatment method for morbid obesity in long term, but without changing in lifestyle, maintaining optimal weight loss is almost impossible. METHODS: Sixty morbid obese patients (BMI ≥ 35) were evaluated before and after 12 weeks of bariatric surgery in order to compare the impact of two different exercise programs on body composition and functional capacity outcomes...
November 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28399016/the-effects-of-beef-chicken-or-whey-protein-post-workout-on-body-composition-and-muscle-performance
#12
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/28327461/muscle-strength-is-impaired-in-men-but-not-in-women-living-with-hiv-taking-antiretroviral-therapy
#13
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 examining 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)...
2018: 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
#14
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/28292885/heavy-strength-training-improves-running-and-cycling-performance-following-prolonged-submaximal-work-in-well-trained-female-athletes
#15
RANDOMIZED CONTROLLED TRIAL
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 ( V O2max 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
https://www.readbyqxmd.com/read/28118310/ratings-of-perceived-exertion-during-acute-resistance-exercise-performed-at-imposed-and-self-selected-loads-in-recreationally-trained-women
#16
Joshua A Cotter, Matthew J Garver, Taylor K Dinyer, Ciaran M Fairman, Brian C Focht
Cotter, JA, Garver, MJ, Dinyer, TK, Fairman, CM, and Focht, BC. Ratings of perceived exertion during acute resistance exercise performed at imposed and self-selected loads in recreationally trained women. J Strength Cond Res 31(8): 2313-2318, 2017-Resistance exercise (RE) is commonly used to elicit skeletal muscle adaptation. Relative intensity of a training load links closely with the outcomes of regular RE. This study examined the rating of perceived exertion (RPE) responses to acute bouts of RE using imposed (40% and 70% of 1 repetition maximum [1RM]) and self-selected (SS) loads in recreationally trained women...
August 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27918670/improvement-of-ice-hockey-players-on-ice-sprint-with-combined-plyometric-and-strength-training
#17
RANDOMIZED CONTROLLED TRIAL
Torstein E Dæhlin, Ole C Haugen, Simen Haugerud, Ivana Hollan, Truls Raastad, Bent R Rønnestad
BACKGROUND: Combined plyometric and strength training has previously been suggested as a strategy to improve skating performance in ice hockey players. However, the effects of combined plyometric and strength training have not previously been compared with the effects of strength training only. PURPOSE: To compare the effects of combined plyometric and strength training on ice hockey players' skating sprint performance with those of strength training only. METHODS: Eighteen participants were randomly assigned to 2 groups that completed 5 strength-training sessions/wk for 8 wk...
August 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27857693/heavy-resistance-training-in-hypoxia-enhances-1rm-squat-performance
#18
Mathew W H Inness, François Billaut, Emily J Walker, Aaron C Petersen, Alice J Sweeting, Robert J Aughey
Purpose: To determine if heavy resistance training in hypoxia (IHRT) is more effective at improving strength, power, and increasing lean mass than the same training in normoxia. Methods: A pair-matched, placebo-controlled study design included 20 resistance-trained participants assigned to IHRT (FIO2 0.143) or placebo (FIO2 0.20), (n = 10 per group). Participants were matched for strength and training. Both groups performed 20 sessions over 7 weeks either with IHRT or placebo. All participants were tested for 1RM, 20-m sprint, body composition, and countermovement jump pre-, mid-, and post-training and compared via magnitude-based inferences...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27717738/influence-of-relative-strength-on-functional-independence-of-patients-with-spinal-cord-injury
#19
Frederico Ribeiro Neto, Patrícia Guanais, Guilherme H Lopes, Elisa Dornelas, Daniela de Campos Barbetta, Alessandra C Coutinho, Carlos Wellington Gonçalves, Rodrigo Rodrigues Gomes Costa
OBJECTIVE: To investigate the influence of strength values and fat mass on functional independence of men with different spinal cord injury (SCI) levels. DESIGN: Cross-sectional study. SETTING: Hospital network. PARTICIPANTS: Men with SCI (N=45). INTERVENTIONS: Subjects were assessed in functional independence scales, a 1 repetition maximum (1RM) test, and body composition to detect absolute and relative strength: 1RM divided by body mass (BM) and lean body mass (LBM), respectively...
June 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/27358494/one-week-of-bed-rest-leads-to-substantial-muscle-atrophy-and-induces-whole-body-insulin-resistance-in-the-absence-of-skeletal-muscle-lipid-accumulation
#20
Marlou L Dirks, Benjamin T Wall, Bas van de Valk, Tanya M Holloway, Graham P Holloway, Adrian Chabowski, Gijs H Goossens, Luc J C van Loon
Short (<10 days) periods of muscle disuse, often necessary for recovery from illness or injury, lead to various negative health consequences. The current study investigated mechanisms underlying disuse-induced insulin resistance, taking into account muscle atrophy. Ten healthy, young males (age: 23 ± 1 years; BMI: 23.0 ± 0.9 kg · m(-2)) were subjected to 1 week of strict bed rest. Prior to and after bed rest, lean body mass (dual-energy X-ray absorptiometry) and quadriceps cross-sectional area (CSA; computed tomography) were assessed, and peak oxygen uptake (VO2peak) and leg strength were determined...
October 2016: Diabetes
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