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Articles 1 - 13 of 13
Full-Text Articles in Life Sciences
Effects Of Rest Interval Length On Smith Machine Bench Press Performance And Perceived Exertion In Trained Men, Ramires A. Tibana, Denis C. Vieira, Vitor Tajra, Martim Bottaro, Belmiro F. De Salles, Jeffrey Willardson, Jonato Prestes
Effects Of Rest Interval Length On Smith Machine Bench Press Performance And Perceived Exertion In Trained Men, Ramires A. Tibana, Denis C. Vieira, Vitor Tajra, Martim Bottaro, Belmiro F. De Salles, Jeffrey Willardson, Jonato Prestes
Jeffrey Willardson
This study compared two different rest intervals (RI) between sets of resistance exercise. Ten resistance-trained men (M age = 24.3, SD = 3.5 yr.; M weigh t= 80.0 kg, SD = 15.3; M height = 1.75 m, SD = 0.04) performed five sets of Smith machine bench presses at 60% of one repetition maximum, either with 1.5 min. or 3 min. RI between sets. Their repetition performance, total training volume, velocity, fatigue, rating of perceived exertion, and muscular power were measured. All of these measures indicated that performance was significantly better and fatigue was significantly lower in the 3 min. …
Influence Of Exercise Order On Upper Body Maximum And Submaximal Strength Gains In Trained Men, Claudio O. Assumpcao, Ramires A. Tibana, Luan C. Viana, Jeffrey Willardson, Jonato Prestes
Influence Of Exercise Order On Upper Body Maximum And Submaximal Strength Gains In Trained Men, Claudio O. Assumpcao, Ramires A. Tibana, Luan C. Viana, Jeffrey Willardson, Jonato Prestes
Jeffrey Willardson
The purpose of this study was to investigate the influence of exercise order on one-repetition maximum (1-RM) and ten-repetition maximum (10-RM) strength gains after 6 weeks of resistance training (RT) in trained men. Sixteen men were randomly assigned into two groups based on the order of exercises performed during training sessions: a group that performed large muscle group exercises first and progressed to small muscle group exercises (LG-SM); while a second group performed the opposite sequence and started with small muscle group exercises and progressed to large muscle group exercises (SM-LG). Four sessions of RT were conducted per week; all …
Supra-Physiological Doses Of Testosterone Affect Membrane Oxidation Of Human Neutrophils Monitored By The Fluorescent Probe C11-Bodipy581/591, Tacito Pessoa De Souza Jr, Andre K. Yamada, Roberto Simao, Tatiana G. Polotow, Rui Curi, Zachary Pope, Jeffrey Willardson, Marcelo P. Barros
Supra-Physiological Doses Of Testosterone Affect Membrane Oxidation Of Human Neutrophils Monitored By The Fluorescent Probe C11-Bodipy581/591, Tacito Pessoa De Souza Jr, Andre K. Yamada, Roberto Simao, Tatiana G. Polotow, Rui Curi, Zachary Pope, Jeffrey Willardson, Marcelo P. Barros
Jeffrey Willardson
The purpose of this study was to determine the effects of supra-physiological doses of testosterone (TES) on membrane oxidation of activated human neutrophils in vitro using an innovative and sensitive technique: the real-time detection with the fluorescence probe C11-BODIPY581/591. Methodological controls were performed with the lipid-soluble and powerful antioxidant astaxanthin at different neutrophil density cultures. Neutrophils from nine healthy young men (23.4 ± 2.5 years, 174.4 ± 7.0 cm height, and 78.3 ± 7.0 kg weight) were isolated and treated with 0.1 or 10 μM TES for 24 h and subsequently labeled with the free radical-sensitive probe C11-BODIPY581/591 for monitoring …
Influence Of Upper-Body Exercise Order On Hormonal Responses In Trained Men, Roberto Simao, Richard Diego Leite, Guilherme Fleury Fina Speretta, Alex Souto Maior, Belmiro Freitas De Salles, Tacito Pessoa De Souza Jr, Jakob L. Vingren, Jeffrey Willardson
Influence Of Upper-Body Exercise Order On Hormonal Responses In Trained Men, Roberto Simao, Richard Diego Leite, Guilherme Fleury Fina Speretta, Alex Souto Maior, Belmiro Freitas De Salles, Tacito Pessoa De Souza Jr, Jakob L. Vingren, Jeffrey Willardson
Jeffrey Willardson
The aim of this study was to examine acute hormonal responses after different sequences of an upper-body resistance-exercise session. Twenty men completed 2 sessions (3 sets; 70% 1-repetition maximum; 2 min passive rest between sets) of the same exercises in opposite sequences (larger to smaller vs. smaller to larger muscle-group exercises). Total testosterone (TT), free testosterone (FT), testosterone/cortisol (T/C) ratio, sex-hormone-binding globulin (SHBG), growth hormone (GH), and cortisol (C) concentrations were measured before and immediately after each sequence. The results indicate that the GH concentration increased after both sessions, but the increase was significantly greater (p < 0.05) after the sequence in which larger muscle-group exercises were performed prior to the smaller muscle-group exercises. No differences were observed between sessions for TT, FT, SHBG, C, or the T/C ratio at baseline or immediately after resistance exercise. These results indicate that performing larger muscle-group exercises first in an upper-body resistance-exercise session leads to a significantly greater GH response. This may have been due to the significantly greater exercise volume accomplished. In summary, the findings of this investigation support the common prescriptive recommendation to perform larger-muscle group exercises first during a resistance-exercise session.
A Qualitative Evaluation Of The Effectiveness Of A Mental Skills Training Program For Youth Athletes, Lee-Ann Sharp, Jennifer Cumming, Charlotte Woodcock, Mark J.G. Holland, Jennifer Cumming, Joan L. Duda
A Qualitative Evaluation Of The Effectiveness Of A Mental Skills Training Program For Youth Athletes, Lee-Ann Sharp, Jennifer Cumming, Charlotte Woodcock, Mark J.G. Holland, Jennifer Cumming, Joan L. Duda
Jennifer Cumming
The purpose of this investigation was to evaluate the effectiveness of a mental skills training (MST) program for male youth elite rugby athletes. Three focus groups were held with 21 under-16 male rugby athletes and four male coaches involved in the MST program to examine the quality of service delivery, athlete responses to the MST program, the mental qualities used by athletes, and its perceived influence on athlete performance. Following inductive-deductive content analysis, 40 subcategories and 16 categories emerged. Participants believed the MST program to be an interactive, well-planned program that increased athlete understanding of MST methods and awareness of …
Introducing The Revised Applied Model Of Deliberate Imagery Use For Sport, Dance, Exercise, And Rehabilitation, Jennifer Cumming, Sarah E. Williams
Introducing The Revised Applied Model Of Deliberate Imagery Use For Sport, Dance, Exercise, And Rehabilitation, Jennifer Cumming, Sarah E. Williams
Jennifer Cumming
This article reviews literature on cognitive and motivational imagery use in the sport, exercise, dance, and rehabilitation domains and outlines a revised applied model of imagery use. The original model by Martin, Moritz, & Hall, 1999 guides practitioners and researchers in determining what cognitive and/or motivational imagery to use in a particular situation for achieving a desired outcome. The revised model proposed builds on the original version by retaining its empiricallysupported “where”, “when”, and “why” components. Incorporating recent advancements in imagery research, the model distinguishes between what is imaged (i.e., the content) from why it is imaged (i.e., the function). …
Layered Stimulus Response Training Improves Motor Imagery Ability And Movement Execution, Sarah E. Williams, Sam J. Cooley, Jennifer Cumming
Layered Stimulus Response Training Improves Motor Imagery Ability And Movement Execution, Sarah E. Williams, Sam J. Cooley, Jennifer Cumming
Jennifer Cumming
This study aimed to test Lang’s bioinformational theory by comparing the effects of layered stimulus and response training (LSRT) with imagery practice on improvements in imagery ability and performance of a motor skill (golf putting) in 24 novices (age, M = 20.13 years; SD = 1.65; 12 female) low in imagery ability. Participants were randomly assigned to a LSRT (introducing stimulus and response propositions to an image in a layered approach), motor imagery (MI) practice, or visual imagery (VI) practice group. Following baseline measures of MI ability and golf putting performance, the LSRT and MI practice groups imaged successfully performing …
Methodological Variations In Guided Imagery Interventions Using Movement Imagery Scripts In Sport: A Systematic Review, Sam J. Cooley, Sarah E. Williams, Victoria E. Burns, Jennifer Cumming
Methodological Variations In Guided Imagery Interventions Using Movement Imagery Scripts In Sport: A Systematic Review, Sam J. Cooley, Sarah E. Williams, Victoria E. Burns, Jennifer Cumming
Jennifer Cumming
Imagery studies have varied widely in the methods used to deliver guided imagery interventions. This variation has led to difficulties comparing studies and uncertainty as to what methods should be followed. A review is needed to evaluate the interventions to date to inform applied recommendations. The aim of this systematic review was to (1) assess the quality of intervention design, (2) investigate the extent to which interventions vary, (3) highlight the different methods that should be considered in the design and implementation of future interventions, and (4) investigate adherence to some of the current theories and models of imagery use. …
Effects Of Different Antagonist Protocols On Repetition Performance And Muscle Activation, Andrade Paz, Jeffrey Willardson, Roberto Simao, Humberto Miranda
Effects Of Different Antagonist Protocols On Repetition Performance And Muscle Activation, Andrade Paz, Jeffrey Willardson, Roberto Simao, Humberto Miranda
Jeffrey Willardson
Objective: To investigate the acute effects of different antagonist manipulation protocols on maximal repetition performance and muscle activation during seated row (SR) exercise. Methods: Fifteen men (22.4 ± 1.1 years old, height 175 cm ± 5.5, weight 76.6 kg ± 7, and 12.3 ± 2.1 of body fat percentage) with previous resistance training experience (3.5 ± 1.2 years) performed four experimental protocols: (TP) one set to repetition failure of SR exercise; (AS) Antagonist static stretching for the pectoralis major (PM) followed by one set of SR; (PNFA) Proprioceptive neuromuscular facilitation for PM followed by one set of the SR; (APS) …
Exercise And Blood Flow Restriction, Zachary K. Pope, Jeffrey Willardson, Brad J. Schoenfeld
Exercise And Blood Flow Restriction, Zachary K. Pope, Jeffrey Willardson, Brad J. Schoenfeld
Jeffrey Willardson
Pope, ZK, Willardson, JM, and Schoenfeld, BJ. Exercise and blood flow restriction. J Strength Cond Res 27(10): 2914– 2926, 2013—A growing body of research has demonstrated the effectiveness of exercise (low-intensity resistance training, walking, cycling) combined with blood flow restriction (BFR) for increased muscular strength and hypertrophy. The BFR is achieved via the application of external pressure over the proximal portion of the upper or lower extremities. The external pressure applied is sufficient to maintain arterial inflow while occluding venous outflow of blood distal to the occlusion site. With specific reference to low-intensity resistance training, the ability to significantly increase …
Effectiveness Of Exercise On Cognitive Impairment And Alzheimer’S Disease, Sandor Balsamo, Jeffrey Willardson, Frederico Santos De Santana, Jonato Prestes, Denise Coscrato Balsamo, Dahan Da Cunha Nascimento, Leopoldo Dos Santos-Neto, Octavio T. Nobrega
Effectiveness Of Exercise On Cognitive Impairment And Alzheimer’S Disease, Sandor Balsamo, Jeffrey Willardson, Frederico Santos De Santana, Jonato Prestes, Denise Coscrato Balsamo, Dahan Da Cunha Nascimento, Leopoldo Dos Santos-Neto, Octavio T. Nobrega
Jeffrey Willardson
Physical activity has a protective effect on brain function in older people. Here, we briefly reviewed the studies and results related to the effects of exercise on cognitive impairment and Alzheimer’s disease. The main findings from the current body of literature indicate positive evidence for structured physical activity (cardiorespiratory and resistance exercise) as a promising non-pharmacological intervention for preventing cognitive decline. More studies are needed to determine the mechanisms involved in this preventative effect, including on strength, cardiorespiratory, and other types of exercise. Thus, the prevention of Alzheimer’s disease may depend on healthy lifestyle habits, such as a structured physical …
The Reality Of Fantasy Sports: A Metaphysical And Ethical Analysis, Chad R. Carlson
The Reality Of Fantasy Sports: A Metaphysical And Ethical Analysis, Chad R. Carlson
Chad Carlson
Fantasy sports have become a major sector of our sport industry. With millions of participants worldwide and billions of dollars generated, fantasy sports have become a fixed part of our sport spectatorship. However, this prevalence has come without much intellectual investigation. Therefore, in this paper I discuss the metaphysics and ethics of fantasy sports. After providing arguments for the consistency of fantasy sports with prominent descriptions of play and games, I compare fantasy sports to other genres of play and games – sports, card games, ‘cybersports’, and spectatorship. After this juxtaposition, I delineate how fantasy sports are different from their …
Book Review: Gadamer’S Ethics Of Play: Hermeneutics And The Other, Chad R. Carlson
Book Review: Gadamer’S Ethics Of Play: Hermeneutics And The Other, Chad R. Carlson
Chad Carlson
No abstract provided.