Asymmetry in Lower Extremity Biomechanics During Dual-limb Landings

Asymmetry in Lower Extremity Biomechanics During Dual-limb Landings
Author: Behrang Behjoo
Publisher:
Total Pages: 43
Release: 2014
Genre:
ISBN:

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

Differences in Lower Limb Kinematics Between Female Athletes and Non-athletes During Bilateral Landing Tasks and Single Leg Step-downs

Differences in Lower Limb Kinematics Between Female Athletes and Non-athletes During Bilateral Landing Tasks and Single Leg Step-downs
Author: Tamara Emeline Tompkins
Publisher:
Total Pages: 0
Release: 2021
Genre: Leg
ISBN:

Introduction: Specific movement patterns at the hip, knee and ankle during dynamic landing tasks have been associated with an increased risk of lower extremity injury. Training strategies have shown to be favourable in decreasing the risk of injury through addressing movement patterns that have been associated with increased injury risk. Objective: To determine differences in lower limb kinematics during three separate bilateral landing tasks (Drop Jump, Drop Landing, Slow Step Down) between female athletes and non-athletes. Methods: Lower extremity kinematic data were obtained using the Xsens MVN motion capture system for 12 university athletes, and 14 university non-athletes. Three-dimensional joint angles were determined for the hip, knee, and ankle at the instant of landing, and peak angles were determined throughout both landings. Peak angular velocities of the hip, knee and ankle joints, and minimum distance between the knees were found during landing. Jumping variables including jump height, ground contact time, flight time, reactive strength index, landing knee distance, minimum knee distance, and landing ankle distance were also analyzed. Results: The athletes, in general, landed with less plantarflexion at the ankle (p

Sex Differences in Lower Limb Biomechanics During a Single-leg Cut with Body Borne Load

Sex Differences in Lower Limb Biomechanics During a Single-leg Cut with Body Borne Load
Author: AuraLea Carylon Fain
Publisher:
Total Pages: 78
Release: 2018
Genre: Leg
ISBN:

"Introduction: Musculoskeletal injuries are ever-increasing in military personnel, particularly females. These musculoskeletal injuries are attributed to adaptations in lower limb biomechanics while performing routine military tasks, such as a single-leg cut, with the addition of body borne load. However, it is unknown if females and males exhibit similar lower limb biomechanics with the addition of body borne load during these tasks. This study sought to compare the lower limb biomechanical adaptations exhibited by females and males performing a single-leg cut with body borne load. Methods: Eleven females and 17 males had lower limb biomechanics quantified during a single-leg cut with four body borne load conditions (20, 25, 30 and 35 kg). Each participant performed five successful cuts off each limb (dominant and non-dominant). Statistical Analysis: For analysis, initial contact (IC) and peak stance (PS) hip, knee and ankle 3D rotations and PS moments, and peak proximal tibial shear were calculated. Each variable was submitted to a RM ANOVA to test main and interaction effects of sex (male, female), load (20, 25, 30 and 35 kg), and limb dominance (dominant vs. non-dominant). Results: Body borne load increased peak proximal anterior tibial shear force (p = 0.011). However, females exhibited significantly greater proximal tibial shear with the 25 kg configuration compared to the 20 kg configuration (p = 0.028), while males exhibited greater peak proximal tibial shear force with 35 kg configuration compared to 20 kg (p = 0.04) and 25 (p = 0.011) kg configurations. During the cut, females exhibited significantly greater IC and PS hip adduction angle (p = 0.016 and p = 0.015), and PS hip adduction (p

The Effects of Loaded Drop Landings on Lower Extremity Biomechanics in College ROTC Cadets

The Effects of Loaded Drop Landings on Lower Extremity Biomechanics in College ROTC Cadets
Author: Allen L. Redinger
Publisher:
Total Pages: 63
Release: 2020
Genre: Impact
ISBN:

Lower extremity musculoskeletal injuries are a common occurrence that can threaten deployment, completion of duty, and quality of life for a soldier. Repetitive activities, explosive movements, impact forces, and extreme joint angles all increase risk for injury and are often found in military physical training. Addition of external loading is necessary for combat situations and can lead to biomechanical alterations in gait, landing, and reactive forces, even at small bodyweight-relative loads. Although external load might not be able to be manipulated, individual strength levels and appropriate landing technique may reduce the relative risk for injury. The purpose of this study was to determine how a combat-relative body-borne loads can affect lower extremity biomechanics in Reserve Officers' Training Core cadets utilizing 3D motion capture and in-ground force plate analysis. Twenty-five college-aged Ohio University Reserve Officer's Training Core cadets and military personnel conducted two series of three consecutive jump landings from a 30cm high box placed half their height from the landing position on two force plates. The testing series consisted of an unweighted baseline condition and a weighted condition of 35% of their bodyweight added to their person by the way of a tactical weighted vest. Unloaded baseline and weighted conditions were compared using a paired t-test and 95% confidence intervals (p

Basketball Sports Medicine and Science

Basketball Sports Medicine and Science
Author: Lior Laver
Publisher: Springer Nature
Total Pages: 1018
Release: 2020-10-05
Genre: Medical
ISBN: 3662610701

This book is designed as a comprehensive educational resource not only for basketball medical caregivers and scientists but for all basketball personnel. Written by a multidisciplinary team of leading experts in their fields, it provides information and guidance on injury prevention, injury management, and rehabilitation for physicians, physical therapists, athletic trainers, rehabilitation specialists, conditioning trainers, and coaches. All commonly encountered injuries and a variety of situations and scenarios specific to basketball are covered with the aid of more than 200 color photos and illustrations. Basketball Sports Medicine and Science is published in collaboration with ESSKA and will represent a superb, comprehensive educational resource. It is further hoped that the book will serve as a link between the different disciplines and modalities involved in basketball care, creating a common language and improving communication within the team staff and environment.