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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 …
Comparing Thigh Muscle Cross-Sectional Area And Squat Strength Among National Class Olympic Weightlifters, Power Lifters, And Bodybuilders, James J. Di Naso, Brian L. Pritschet, John D. Emmett, Jill W. Owen, Jeffrey Willardson, Travis W. Beck, Jason M. Defreitas, Fabio E. Fontana
Comparing Thigh Muscle Cross-Sectional Area And Squat Strength Among National Class Olympic Weightlifters, Power Lifters, And Bodybuilders, James J. Di Naso, Brian L. Pritschet, John D. Emmett, Jill W. Owen, Jeffrey Willardson, Travis W. Beck, Jason M. Defreitas, Fabio E. Fontana
Jeffrey Willardson
Few studies have compared anthropometric characteristics among national class athletes from different resistance training disciplines, such as Olympic Weightlifting (OL), Power Lifting (PL), and Bodybuilding (BB). Objective: The purpose of the current study was to determine if significant differences exist in the relationship between thigh muscle cross-sectional area and back squat strength among national class athletes from the sports of OL, PL, and BB. Methods: Fifteen national class athletes were assessed for back squat strength, mid-thigh circumference, and mid-thigh skinfold from which total thigh cross-sectional was estimated. A series of One-Way ANOVAs and Pearson Product Moment Correlations were used to …
Acute Effects Of Antagonist Stretching On Jump Height, Torque, And Electromyography Of Agonist Musculature, John B. Sandberg, Dale R. Wagner, Jeffrey Willardson, Gerald Aparecido Smith
Acute Effects Of Antagonist Stretching On Jump Height, Torque, And Electromyography Of Agonist Musculature, John B. Sandberg, Dale R. Wagner, Jeffrey Willardson, Gerald Aparecido Smith
Jeffrey Willardson
Although there has been substantial research on the acute effects of static stretching on subsequent force and power development, the outcome after stretching of the antagonist musculature has not been examined. The purpose of this study was to investigate the effects of static stretching of antagonist musculature on multiple strength and power measures. Sixteen trained men were tested for vertical jump height and isokinetic peak torque production during knee extension at 60°.s (SlowKE) and 300°.s (FastKE). Electromyography was recorded for the vastus lateralis and the biceps femoris muscles during isokinetic knee extension. Subjects performed these tests in a randomized counterbalanced …
Effect Of Rest Interval Length On The Volume Completed During Upper Body Resistance Exercise, Humberto Miranda, Roberto Simão, Leonardo Marmo Moreira, Renato Aparecido De Souza, João Antônio Alves De Souza, Belmiro Freitas De Salles, Jeffrey Willardson
Effect Of Rest Interval Length On The Volume Completed During Upper Body Resistance Exercise, Humberto Miranda, Roberto Simão, Leonardo Marmo Moreira, Renato Aparecido De Souza, João Antônio Alves De Souza, Belmiro Freitas De Salles, Jeffrey Willardson
Jeffrey Willardson
The purpose of the current study was to compare the workout volume (sets x resistance x repetitions per set) completed during two upper body resistance exercise sessions that incorporated 1 minute versus 3 minute rest intervals between sets and exercises. Twelve trained men completed two experimental sessions that consisted of 5 upper body exercises (i.e. barbell bench press, incline barbell bench press, pec deck flye, barbell lying triceps extension, triceps pushdown) performed for three sets with an 8- RM load. The two experimental sessions differed only in the length of the rest interval between sets and exercises; one session with …
A Comparison Of Once Versus Twice Per Week Training On Leg Press Strength In Women, J. Burt, R. Wilson, Jeffrey Willardson
A Comparison Of Once Versus Twice Per Week Training On Leg Press Strength In Women, J. Burt, R. Wilson, Jeffrey Willardson
Jeffrey Willardson
The purpose of this study was to compare strength differences between 2 groups of untrained women, who performed a single set of the leg press exercise once or twice per week. Methods. Twenty-one women were divided randomly into 2 groups: Group 1 (n=10) performed a single set of the leg press exercise once per week, while Group 2 (n=11) performed a single set of the leg press exercise twice per week for a period of 8 weeks. Throughout the duration of the study, an amount of resistance was utilized that allowed for a single set of 6 to 10 repetitions …