Download or read book Effects of Augmented Local Abdominal Activation Patterns on Lower Extremity Biomechanics During Landing in Males and Females written by Anthony S. Kulas and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This research assessed changes in lower extremity biomechanics as a result of augmented local abdominal contractions during double leg landings. The study design followed a two-day (control and intervention days) within subject model in which two conditions on each day were compared, (control-control and control-experimental) with between sex comparisons. Fifty subjects (25 males and 25 females) were activity matched and represented a sample of healthy and recreationally active individuals. A repeated measures ANOVA comparing control and experimental conditions on the intervention day revealed that all subjects significantly increased local abdominal activation during 150ms prior to landing. However, a 2 (sex) x 3 (muscle) x 2 (phase of landing) repeated measures ANOVA demonstrated that only males maintained this contraction during the 150ms time interval after landing. A repeated measures ANOVA evaluating changes in leg spring stiffness (LSS) as a result of the augmented local abdominal contraction showed a sex by condition interaction demonstrating that only males experienced significant increases in LSS from control to experimental condition while females demonstrated no significant changes. No significant differences by condition were noted when assessing changes in ankle, knee, and hip energetics. The evaluation of lower extremity total joint displacements across condition demonstrated that males increased LSS through decreases in hip range of motion while females showed no significant changes in hip range of motion but increased knee and ankle motion. From these results we concluded that augmented local abdominal activation during a double leg landing task increased LSS by decreasing hip range of motion in males."--Abstract from author supplied metadata.

Download or read book Abdominal Fatigue and Lower Extremity Kinematics During a Drop Landing in Females written by Eryn Murphy and published by . This book was released on 2015 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Abdominal Training on Postural Control Lower Extremity Kinematics Kinetics and Muscle Activation written by Matthew J. Gage and published by . This book was released on 2009 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: Context: Abdominal training may decrease the risk of lower extremity injuries through improved balance and postural control. Objective: To determine the effect of an eight-week abdominal-training program on center of pressure, lower extremity joint angles, and abdominal muscle activation during a single-leg drop landing. The effects of abdominal training on abdominal muscle thickness was assessed. Design: A cohort research design. Setting: Research laboratory. Other Participants: Sixty healthy physically active college-aged students participated. They were divided into three groups: Control, Chronic ankle instability (CAI), and Healthy. Nineteen Control (age = 22.0 ł 2.72 yrs, mass = 74.1 ł 13.8 kg, height = 172.6 ł 11.3 cm, BMI = 24.8 ł 3.1 %), 21 CAI (age = 22.1 ł 2.3 yrs, mass = 77.6 ł 14.0 kg, height = 175.4 ł 12.3 cm, BMI = 25.1 ł 2.6 %), and 20 healthy (age = 22.9 ł 3.4 yrs, mass = 70.9 ł 15.6 kg, height = 172.2 ł 8.9 cm, BMI = 23.7 ł 3.3 %). Subjects in the CAI group had a history of CAI and functional ankle instability (FAI). The Ankle Instability Index and the Functional Ankle Ability Measure were used to self-report CAI and FAI respectively. Interventions: The CAI and Healthy groups participated in an eight-week abdominal-training program while the Control group maintained their normal activities of daily living and level of physical activity. Main Outcome Measures: Abdominal muscle thickness was measured biweekly throughout the study. Center of pressure excursion, muscle activation, vertical ground reaction force, and lower extremity joint angles were measured during a single-leg drop landing, pre- and postabdominal training. Results: Muscle thickness at rest increased in the rectus abdominis and external oblique muscles follow training. Eight weeks of abdominal training decreased vertical ground reaction forces and muscle activation down the lower kinetic chain. Center of pressure excursion and velocity were increased following training. Conclusions: Eight-weeks of abdominal training increased abdominal muscle thickness. Training improved neuromuscular efficiency throughout the kinetic chain and may have improved dynamic postural control. Our data also suggest CAI subjects may utilize both feedforward and feedback mechanisms to maintain postural control.

Download or read book Acute and Delayed Effects of an Exhaustive Bout of Exercise on Landing Biomechanics in Women and Men written by Kristof Kipp and published by . This book was released on 2010 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although female athletes are at greater risk of non-contact knee injuries than men, the factors that contribute to these injuries are not well understood. One important question is whether intense exercise influences the risk of knee injury, both acutely and over the following days. The purpose of this study was thus to evaluate the acute and delayed effects of an intense bout of exercise on risk factors associated with knee injury in women and men. Fifteen each of healthy young women and men performed two testing sessions, 44-52 hours apart. In each session, biomechanical data were collected during execution of sets of 10 drop vertical jumps. An initial set of drop vertical jumps was compared to a set performed immediately after an intense exercise bout on the first day and to a set performed on the second day to determine the acute and delayed effects of fatigue, respectively. A two-way repeated measures ANOVA was used to determine the effect of the exercise bout on risk factors associated with knee injury during the jump task in women and men. Intense exercise had immediate effects on joint kinematics and kinetics, patterns of joint motion and moments, and the variability of joint couplings. The acute kinematic and kinetic changes at the hip and ankle were consistent with compensatory strategies, whereas changes at the knee were consistent with an increased risk of injury. The same appeared to be true for the patterns of joint motions and moments. Acute changes in the variability of inter- and intra-limb joint couplings were also consistent with compensatory modifications of lower limb biomechanics. Delayed effects were limited to patterns of joint motion and moments, and reflected jointdependent combinations of compensatory strategies or mechanical changes that could increase knee injury risk. Although intense exercise had acute and prolonged effects on several biomechanical variables, none of the effects depended on the sex of participants. These results indicate that intense exercise has immediate and prolonged effects on landing biomechanics, independent of sex. While the majority of changes point to a compensatory strategy, a few were consistent with increased risk of knee injury.

Download or read book Effects of plyometric training and augmented feedback on lower extremity biomechanics during the landing task written by Husain J. Mahdi and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Ankle Taping on Lower Extremity Biomechanics During Unilateral Landing written by Sumie Ichizaki and published by . This book was released on 2004 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Asymmetry in Lower Extremity Biomechanics During Dual limb Landings written by Behrang Behjoo and published by . This book was released on 2014 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: PURPOSE: The main objective of this study was to compare energy absorption and power production between the preferred and non-preferred lower limb during a drop jump tasks. METHODS: A total of 44 active subjects (22 males, 22 females) participated. Energy absorption and power production were measured for both lower limbs during five 0.45 m drop jumps. Two separate repeated measures ANOVAs compared energy absorption during the landing phase, and power production during the propulsion phase between the two limbs. RESULTS: There was a main effect of limb (P

Download or read book Effect of Ankle Taping on Lower Extremity Biomechanics During Drop Landings written by Michael J. Gale and published by . This book was released on 2002 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sex and Leg Dominance Effects on Neuromuscular Control Patterns and Lower Body Biomechanics During Single Leg Landings of Post pubescent Athletes written by Brittany E. Melanson and published by . This book was released on 2017 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Limb Dominance on Lower Extremity Biomechanics when Landing from a Jump written by Jennifer A. Spencer and published by . This book was released on 2015 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Height and Post landing Movement Task on Lower Extremity Landing Biomechanics written by Brian Lynn Caster and published by . This book was released on 1996 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The effects of height and post landaing movement task on lower extremity landing biomechanics written by Brian Lynn Caster and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Gluteus Medius Muscle Activation on Lower Limb Three dimensional Kinematics and Kinetics in Male and Female Athletes During Three Drop Jump Heights written by Stephanie Christine Nowak and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Women are four to eight times more likely to injure their anterior cruciate ligament (ACL) compared to men. It is most commonly injured through a non-contact mechanism during game time situations. During landings, women display valgus collapse, where a less active gluteus medius muscle (GMed) may be unable to control the internal rotation of the thigh, causing an increase in knee joint abduction angle, augmenting the risk of ACL injury. This study's purpose was to determine the difference between 12 male and 12 female athletes in muscle activity, specifically the GMed, and the 3D kinematics and kinetics of the lower-limb during drop jump landings from three heights; maximum vertical jump height, tibial length, and a commonly used height of 40cm. Results showed that females had greater hip adduction and knee abduction angles compared to men. The GMed activity showed no significant differences between sexes at each drop jump height.

Download or read book Relationship Between Lumbo pelvic hip Complex Muscle Activation and Lower Limb Biomechanics During Functional Tasks Before and After Fatigue written by Erika Zambarano and published by . This book was released on 2019 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Knee injuries are extremely prevalent in the active populations. Many knee injuries share risk factors including increased knee valgus, increased hip adduction, and poor neuromuscular control. Due to the potential for long-term complications, a variety of injury prevention programs have been developed and many consider there is a breakdown occurring somewhere within the kinetic chain. The lumbo-pelvic-hip complex (LPHC) is the center of the kinetic chain and is responsible for force generation in athletic movement and so it is often targeted in such programs and in treatment. There is limited research evaluating the role of LPHC stability and the connection to the rest of the kinetic chain during sport related movements. There is also limited research looking at the effect fatigue has on the ability of the LPHC to stabilize in isolation and the effect it has on the biomechanics of the lower extremity during functional tasks. Therefore, the purpose of this study was to observe the effect of full body fatiguing exercise on the outcomes of a LPHC stability assessment and subsequent muscle activation and biomechanics during a single leg squat (SLS). A descriptive laboratory study was utilized with the independent variables being time (pre- and post-fatigue) and dependent variables being performance on a LPHC stability assessment, muscle activation of muscles of interest, and a frontal plane biomechanical assessment. Healthy, physically active adults were recruited for this study and completed baseline measures for an LPHC stability assessment and SLS, completed a fatiguing protocol, and then repeated the two tasks in a fatigued state. Results indicated a significant decrease in performance on the LPHC stability assessment and an increase in activation of the rectus abdominis muscle following fatigue. The rectus abdominis and internal oblique increased in activation during the SLS following fatigue, but the biomechanical measures experienced no significant changes during the task. In conclusion, full body fatigue negatively impacts the ability of the LPHC to stabilize in isolation. The muscle activity of the LPHC during a functional task is also altered; however, the impact this has on the quality of movement and biomechanics should be further investigated.

Download or read book Handbook of Sports Medicine and Science written by Dennis J. Caine and published by John Wiley & Sons. This book was released on 2013-07-18 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new volume in the Handbook of Sports Medicine and Science series, published in conjunction with the Medical Commission of the International Olympic Committee, offers comprehensive and practical guidance on the training and medical care of competitive gymnasts. Written and edited by leading trainers, team doctors, coaches and other professionals with unparalleled experience in elite gymnastics, this book covers all the key aspects of caring for gymnasts, minimizing the unique risks these athletes face, and treating injuries when they happen. The book is organized into 4 sections covering: The evolution of gymnastics Growth and development Training and performance Sports medicine Individual chapters cover key topics such as energy needs and body weight management; biomechanics; psychology; the epidemiology of gymnastic injuries; treatment and rehabilitation of common injuries; injury prevention; and more. Endorsed by the International Gymnastics Federation (FIG), no other book offers such an in-depth look at the unique considerations and challenges that affect the growth, performance, training, and medical care of athletes in this demanding sport.

Download or read book Introduction to Sports Biomechanics written by Roger Bartlett and published by Routledge. This book was released on 2002-04-12 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1996. Routledge is an imprint of Taylor & Francis, an informa company.