Comparison of Bilateral and Unilateral Strength in Trained NCAA Division Iii Football Players PDF Download
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Author: Andrew K. Papirio
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
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Book Description
ABSTRACT: The bilateral deficit (BD) is a well-established phenomenon describing the difference in force capabilities between bilateral and unilateral movements. The majority of research has used seated machine-based protocols to measure the BD and deduce training implications. However, these are uncommon in modern strength training practices and do not reflect the movement patterns found in sport. The purpose of this study was to use a ground-based multi-joint exercise to determine if a BD was present in trained athletes. Forty trained NCAA Division III football players (20.9 + 0.8 years, 209.7 + 30.1 lb., 71.2 + 2.2 in) completed a bilateral and unilateral 1RM deadlift. Participants were divided into two groups to ensure that fatigue and the order of the 1RM tests did not have any effect. Group A (n = 17) completed the bilateral 1RM deadlift first, Group B (n = 23) completed the unilateral 1RM deadlift first. The remaining test was performed 48-72 hours later to provide adequate rest. Unilateral 1RM values were multiplied by two and compared to the participants’ bilateral 1RM. A significant bilateral deficit was present in both groups (M = 102.5). Participants were significantly stronger on one leg, relatively. Despite perceptions about bilateral facilitation, experienced athletes with a balanced training history appear to experience a BD and possess the capacity to be stronger on one leg. These findings suggest that trained athletes may benefit from unilateral training for the development of strength.
Author: Andrew K. Papirio
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
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Book Description
ABSTRACT: The bilateral deficit (BD) is a well-established phenomenon describing the difference in force capabilities between bilateral and unilateral movements. The majority of research has used seated machine-based protocols to measure the BD and deduce training implications. However, these are uncommon in modern strength training practices and do not reflect the movement patterns found in sport. The purpose of this study was to use a ground-based multi-joint exercise to determine if a BD was present in trained athletes. Forty trained NCAA Division III football players (20.9 + 0.8 years, 209.7 + 30.1 lb., 71.2 + 2.2 in) completed a bilateral and unilateral 1RM deadlift. Participants were divided into two groups to ensure that fatigue and the order of the 1RM tests did not have any effect. Group A (n = 17) completed the bilateral 1RM deadlift first, Group B (n = 23) completed the unilateral 1RM deadlift first. The remaining test was performed 48-72 hours later to provide adequate rest. Unilateral 1RM values were multiplied by two and compared to the participants’ bilateral 1RM. A significant bilateral deficit was present in both groups (M = 102.5). Participants were significantly stronger on one leg, relatively. Despite perceptions about bilateral facilitation, experienced athletes with a balanced training history appear to experience a BD and possess the capacity to be stronger on one leg. These findings suggest that trained athletes may benefit from unilateral training for the development of strength.
Author: Olivia H. Indorf
Publisher:
ISBN:
Category :
Languages : en
Pages : 79
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Book Description
ABSTRACT: The bilateral squat is traditionally chosen as a main lower body exercise in strength and conditioning programs, with unilateral lower body exercises being used as assistance exercises that generally receive less emphasis (McCurdy et al., 2005). Most sport skills, however, such as running, jumping, bounding, and changing direction, are performed unilaterally (Speirs et al., 2016). The purpose of the current study was to determine the relationship between unilateral and bilateral lower body strength and power. Twenty-two NCAA division III football players between the ages of 18-23 participated in the current study. Pearson product moment correlations were conducted to assess the relationship between front squat 1RM and peak power, split squat 1RM and peak power, and front squat 1RM and split squat 1RM. Significant positive linear relationships were found between peak power and front squat 1RM (r = .516, p = .014), peak power and split squat 1RM (r = .451, p = .035) and front squat 1RM and split squat 1RM (r = .778, p
Author: Bashir A. Ismail
Publisher:
ISBN:
Category :
Languages : en
Pages : 99
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Book Description
ABSTRACT: The purpose of the study was to investigate the relationship between unilateral (UNI) and bilateral (BIL) squat strength and field-based performance tests of sprint speed and change of direction speed (CODS) in Division III team sport athletes. Data was collected from 28 healthy male athletes (19.61 ± 1.07 year, 179.42 ± 4.85 cm, 79.91 ± 10.35 kg). Athletes represented team sports such as football, lacrosse, soccer and baseball. Subjects completed the Pro-agility, 30 m sprint test and 3 RM strength tests unilaterally with the rear foot elevated split squat (RFESS)and bilaterally with front squat, whereby load lifted was used to calculate relative strength ratio. No significant correlation was found between RFESS strength, and CODS or 30m sprint (r = -.255, p > .05, r = -.276, respectively). No significant correlation was found between BIL strength, and CODS or 30 m sprint (r = -.296, p >.05, r = -.349, respectively), although BIL strength produced a moderate to large effective size with the 30 m sprint (r2 = .121). Despite no significant relationships between lower-body strength and field-based performance measures exists, strength and conditioning practitioners should not be discouraged from implementing UNI training with their athletes. The lack of strong relationship between neither BIL or UNI strength and field-based performance measures indicates that neither method is more effective to develop foundations for speed and CODS.
Author: David J. Magee
Publisher: Elsevier Health Sciences
ISBN: 1437715729
Category : Medical
Languages : en
Pages : 822
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Book Description
Part of David J. Magee's Musculoskeletal Rehabilitation Series, Athletic and Sport Issues in Musculoskeletal Rehabilitation provides expert insight and clear rehabilitation guidelines to help you manage injuries and special medical needs unique to athletic clients. Contributions from leading physical therapists, athletic trainers, and orthopedic surgeons give you a comprehensive, clinically relevant understanding of common sports-related injuries and help you ensure the most effective therapeutic outcomes. - Addresses a broad range of sports-related injuries and conditions - Reinforces key concepts with highlighted content and hundreds of detailed illustrations - Summarizes essential information for fast, easy reference in class or in clinical settings
Author: Paul W. Park
Publisher:
ISBN:
Category : Soccer
Languages : en
Pages : 112
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Book Description
ABSTRACT: The study was designed to compare the effects of a unilateral (UNI) and bilateral (BI) focused offseason training program on speed and agility performance. Seventeen Division III collegiate soccer athletes were randomly assigned into either a UNI (N = 9) or BI (N = 8) focused training program. The subjects were familiarized and tested in the 40-yard dash, proagility drill, and the 3-cone drill before and after the 6-week training program. The training programs consisted of heavy resistance training sessions twice a week and a plyometric and running training day once a week. The BI training program consisted of resistance and plyometric exercises with both legs contacting the ground simultaneously while the UNI training program consisted of exercises with only one leg contacting the ground. Five 2x2 ANOVAs and Cohen's effect sizes were used to examine the effects of a UNI or BI focused program pre and post a 6-week training period. No significant differences were found between the UNI and BI training groups or pre and post the 6-week training period for the five dependent variables: 40-yard dash, left proagility, right proagility, left 3-cone drill, and right 3-cone drill. Cohen's effect sizes (d) were computed for both groups and showed all positive effect sizes for the UNI training group with the largest being 0.74 for the left 3-cone drill and 0.60 for the right 3-cone drill. The BI training group showed all negative effect sizes except for the left 3-cone drill (0.19) with the largest being -0.73 for the 20-yard dash. The recommendation to coaches is to emphasize unilateral exercises into their speed and agility programs, and consider removing bilateral back loaded exercise due to the possible risk associated with low back injury.
Author: Cameron S. Ringstead
Publisher:
ISBN:
Category : Football players
Languages : en
Pages : 128
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Book Description
ABSTRACT: The purpose of the current study was to investigate the differences in strength and power between playing positions and starters versus non-starters. Division III post-season male American football players (N = 38) participated in a descriptive study that consisted of strength, power, and dynamic performance variable testing. Subjects were grouped depending on playing position (skill, big skill, or line) and into starters and non-starters. Subjects completed a 3-repetition maximum hexagonal barbell deadlift to determine strength capabilities. Power output was assessed using a hexagonal barbell jump at 30, 40, 50, 60, and 70% of estimated 1RM. Dynamic performance variables consisted of depth jumps, to calculated ground contact time, jump height and reactive strength index, and 5, 10, 30m sprint capability. A statistically significant (p
Author: Jim Stoppani
Publisher: Human Kinetics
ISBN: 1718214499
Category : Health & Fitness
Languages : en
Pages : 626
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Book Description
Whether you seek to maximize muscle mass, strength, or fat loss, Jim Stoppani's Encyclopedia of Muscle & Strength, Third Edition, will deliver visible results with over 380 exercises and nearly 140 ready-to-use workouts.
Author: Urs Granacher
Publisher: Frontiers Media SA
ISBN: 2889456277
Category :
Languages : en
Pages : 308
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Book Description
The Frontiers Research Topic entitled "Neuromuscular Training and Adaptations in Youth Athletes" contains one editorial and 22 articles in the form of original work, narrative and systematic reviews and meta-analyses. From a performance and health-related standpoint, neuromuscular training stimulates young athletes' physical development and it builds a strong foundation for later success as an elite athlete. The 22 articles provide current scientific knowledge on the effectiveness of neuromuscular training in young athletes.
Author: Jay Hoffman
Publisher: Human Kinetics
ISBN: 1492583669
Category : Science
Languages : en
Pages : 520
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Book Description
Physiological Aspects of Sport Training and Performance, Second Edition With Web Resource, updates and expands on the popular first edition, providing an in-depth discussion of physiological adaptation to exercise. Students will learn the importance of an evidence-based approach in prescribing exercise, while sports medicine professionals and health care providers will appreciate using the text as a primary reference on conditioning and performance of athletes. A range of topics are covered, including environmental influences on performance, hydration status, sport nutrition, sport supplements, and performance-enhancing drugs. The book is focused on physiological adaptation to exercise with a goal of providing practical applications to facilitate exercise prescriptions for a variety of athletes. Physiological Aspects of Sport Training and Performance, Second Edition, is organized into five parts. The first part examines physiological adaptation and the effects of various modes of training on biochemical, hormonal, muscular, cardiovascular, neural, and immunological adaptations. The second part covers principles of exercise training and prescription. The third part discusses nutrition, hydration status, sport supplementation, and performance-enhancing drugs. The fourth part focuses on environmental factors and their influence on sport performance. The fifth and final part is focused on how certain medical and health conditions influence sport performance. Updates in this second edition focus on cutting-edge knowledge in sport science and sports medicine, including the latest information on physiological adaptations to exercise; current trends for training for power, speed, and agility; eye-opening discussions on sport supplementation and performance-enhancing drugs; data on training with medical conditions such as diabetes and exercise-induced bronchospasm; and groundbreaking information on training in heat and cold and at altitude. In addition, new chapters offer a practical approach to the yearly training program and sudden death in sport. The second edition also incorporates the following features to enhance practical application and facilitate students’ learning: • A new web resource includes 80 drills and 41 video demonstrations that help readers understand how to implement the various exercises. • Chapter objectives provide an overview of key content in each chapter. • Chapter review questions help students assess their learning. • In Practice sidebars bring chapter content to life in a practical manner and help students better understand the material. Students and instructors will benefit from the new web resource, which features 80 drills and detailed instruction on performing each drill. The drills can be used for a dynamic warm-up or to enhance speed and agility. Most drills are accompanied by at least one photo showing how to perform a key movement of the drill. Forty of the drills are accompanied by a video of the drill being performed in its entirety, and a dynamic warm-up routine video features 10 warm-up exercises. Physiological Aspects of Sport Training and Performance, Second Edition, provides a strong basis for understanding adaptation to exercise and appreciating how changes in program variables can alter training adaptations. All the information in this text is presented in an attractive, reader-friendly format that is conducive to learning. The text serves as both a key educational tool and a primary reference for exercise prescription for athletes.
Author: Anthony Turner
Publisher: Routledge
ISBN: 1000534138
Category : Sports & Recreation
Languages : en
Pages :
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Book Description
Becoming an effective strength and conditioning practitioner requires the development of a professional skills set and a thorough understanding of the scientific basis of best practice. Aimed at advanced students and novice-to-expert practitioners, in this book the authors explore the latest scientific evidence and apply it to exercise selection and programming choices across the full range of areas in strength and conditioning, from strength and power, speed and agility, to aerobic conditioning. Since the first edition of this text was written extensive research has expanded the supporting evidence base that provides the theoretical foundation for each chapter. In addition, some areas that were previously under-researched have now been expanded and some key concepts have been further challenged. Each chapter is written by experts with experience in a wide variety of sports, including both applied and research experience, ensuring this concise but sophisticated textbook is the perfect bridge from introductory study to effective professional practice. While advanced concepts are explored within the book, the coach must not forget that consistency in the application of the basic principles of strength and conditioning is the foundation of athletic development. Advanced Strength and Conditioning: An Evidence- based Approach is a valuable resource for all advanced students and practitioners of strength and conditioning and fitness training.
