Download or read book The Effects of an OpenNI Kinect based Biofeedback Intervention on Kinematics at the Knee During Drop Vertical Jump Landings written by Edward Nyman (Jr.) and published by . This book was released on 2013 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: The purpose of this study was to design and evaluate the validity and effectiveness of a prototype real-time Kinect-based biofeedback and screening system (KBBFSS) during drop vertical jump (DVJ) ACL injury prevention training in young female athletes. We hypothesized that KBBFSS would be both valid and reliable as compared with traditional MOCAP, and that a four-week intervention using KBBFSS would be effective at improving landing kinematics. Methodology: 24 female gymnasts were randomized into control (CTRL) or Kinect-based biofeedback (KBF) groups. Eight of the subjects were additionally randomized into a validation subset. Subjects were grouped as high risk or normal risk using a novel risk stratification algorithm. Custom KBBFSS software afforded on-screen representation of limb and joint segments responding intuitively and immediately to subject movement. Subjects performed twenty 30cm drop landings three days per week for four weeks, wherein KBF subjects used the KBBFSS to augment landing mechanics, while CTRL subjects did so without KBBFSS. Alpha-level was set a priori at pd".05. Results: KBBFSS results were valid for pre (r=0.963) and post (r=0.897) knee flexion, and pre (r=0.815) and post (r=0.916) knee separation distance as compared with MOCAP. Knee flexion change score was statistically different between groups (p=0.001) and effect size was large (d= 1.618), power of 0.93. Knee separation distance change score was statistically different (p=0.024) between groups, with moderate effect size (d=0.99) and power of 0.73. KBF group reduced peak vGRF more than controls, with large effect size (d=1.84). KBF decreased peak bilateral frontal plane valgus knee moment more than controls, with moderate effect size (d=0.44). Correlations between pre-training RQS and changes in knee flexion and separation distance for high risk subjects were moderate. Conclusion: KBBFSS kinematic values are valid and KBF intervention significantly improved non-contact ACL injury risk knee kinematics. The RQS algorithm moderately predicted outcome measures, supporting previously established postulations that individuals who are at greatest functional risk of non-contact ACL injury stand to gain the greatest benefit from intervention. Though further research is warranted, in particular longitudinally, this new clinically-deployable tool may be effective in combating non-contact ACL injury in female adolescent athletes. Less.

Download or read book Gymnastics Medicine written by Emily Sweeney and published by Springer Nature. This book was released on 2019-10-08 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the most current information on the treatment of athletes involved in gymnastics, a multifaceted sport with unique demands on its participants that can lead to a myriad of medical conditions and injury patterns. It opens with an introduction to the history of gymnastics and a brief review of gymnastics disciplines and events. An overview of gymnastics injury epidemiology lays the foundation for the rest of the book. Growth and developmental issues are also discussed in detail, as many young gymnasts train long hours before or during puberty. Concepts related to the biomechanics of gymnastics, common overuse and acute musculoskeletal injuries, psychological issues, concussions, as well as rehabilitation and return-to-play principles round out the presentation. Throughout, there is the emphasis that young athletes are not simply small adults, and that they have unique needs and considerations for evaluation and treatment. Written and edited by experts in the field, some of whom are former gymnasts themselves, Gymnastics Medicine covers all of the relevant information on evaluation, management and return-to-play for sports medicine physicians, advanced practice providers, physical therapists, athletic trainers, exercise scientists, and mental health professionals.

Download or read book Learned Biomechanics Through Feedback written by Laura Young and published by . This book was released on 2013 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a critical need to develop cost and time-effective prophylactic interventions to decrease the risk of anterior cruciate ligament (ACL) injury. Currently, jumplanding feedback interventions have demonstrated the ability to alter movements that increase the risk of ACL injury during landing. Unfortunately, it remains unknown if jump-landing interventions, which demonstrate the ability to alter movements during a jump-landing task, can alter similar movements in a different task, such as a cutting maneuver. The specific aims of this randomized control trial was to determine the effects of a jump landing feedback intervention on 1) the kinetics and 2) the kinematics performed during an anticipated cutting maneuver and a jump-landing task compared to a control group. Our central hypothesis was that biomechanical alterations known to occur during a jump-landing task, following a jump landing feedback intervention, will also be altered during a cutting maneuver. We used separate repeated measures ANOVAs to evaluate differences in kinetics and kinematics between feedback and control groups overtime. The results of this study revealed a significant decrease in peak vertical ground reaction force (VGRF) in the feedback group during the jump landing task but not the cutting task. Neither group improved knee flexion angles during the jump landing task, while the feedback group became more extended at the knee joint compared to the control during the cutting task. Both groups demonstrated an improvement in hip flexion over time in the jump landing task, but not the cutting task. Lastly, neither group demonstrated a change in knee abduction angles during either of the tasks. The findings of the study do not entirely support our hypotheses, but we would expect to find more differences with more participants added to the sample size. While the results were not what we expected, they have provided us with insight into the limitations of a feedback intervention and in order to improve future prevention programs, it is imperative to understand the limitations of the feedback intervention.

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 The Effect of Ankle Bracing on Knee Joint Kinematics and Kinetics During Repeated Single Leg Hop and Drop Vertical Jump in High School Aged Girls written by Virginia Norene Christensen and published by . This book was released on 2009 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of a Functional Fatigue Protocol on Landing Kinetics and Kinematics of the Lower Extremity written by Ashley S. Long and published by . This book was released on 2005 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discussion. Significant changes in time to peak GRF, time to peak of maximum knee flexion, muscle activation and temporal patterning may suggest a kinematic difference in landing form in a fatigued state.

Download or read book The Effects of a Soccer specific Vertical Jump on Landing Mechanics written by Sophia Mancini and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: Anterior cruciate ligament (ACL) injury frequently occurs in female soccer athletes during deceleration movements such as landings. In soccer, landings mostly occur following jumping headers. Little research has been done to determine the mechanics that follow and how they compare to standard drop vertical jumps (DVJ). The purpose of this study was to analyze differences between jumps and landings in kinematics, kinetics, and muscle activation patterns in female soccer athletes to better assess the sport-specific risk for ACL injury. It was hypothesized that more biomechanical tendencies associated with ACL risk factors would emerge from soccer-specific vertical jumps (SSVJ) compared to DVJs and second landings (L2) compared to first landings (L1). Methods: 8 female participants (20.88 ± 1.17 years; 1.68 ± 0.06 m; 58.77 ± 7.65 kg) performed DVJs and SSVJs. Motion capture, force, and electromyography (EMG) data were collected to calculate joint motion, loading, and muscle activation throughout landing phases. Data were analyzed using RM-ANOVA, collapsed across jump (DVJ vs. SSVJ) and landing (L1 vs. L2). Results: Significant findings were revealed in all categories, however, kinematic variables were the most profound results. Significantly higher jump height was achieved in DVJs (p=0.008). SSVJs and L2s produced less peak hip (p=0.03; d=0.817) (p=0.007; d=1.566) and knee 2 (p=0.002; d=0.732) (p=0.002; d=1.476) flexion during landing, respectively. A significant interaction was present for trunk flexion at initial contact (p=0.034). Follow-up tests revealed no significant differences following headers. Discussion: SSVJ-L2s displayed a more erect landing at the hip and knee, a known ACL risk factor, however, it is unclear whether these results are due to trunk movement during heading. Limited results in kinetic and EMG variables may be explained by the difference in jump height achieved, therefore further investigation in a more elite population is required. Additionally, SSVJs may be a good sport-specific screening tool.

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 Determining Clinical Impairments that Lead to Changes in Dynamic Knee Valgus Following a 4 week Feedback Intervention written by Caitlin Elisabeth Lefevre and published by . This book was released on 2014 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective: To determine if there is a change in spinal reflex excitability, corticospinal excitability, quadriceps strength, hip strength, hip range of motion, knee range of motion, core endurance and balance before and after a four week jump landing intervention compared to a control group. To determine if there is a change in performance, by means of a vertical jump test, following a four week jump landing intervention. To determine if spinal reflex excitability, corticospinal excitability, quadriceps strength, hip strength, hip range of motion, knee range of motion, core endurance and balance correlates to knee abduction angle during a jump landing task at baseline. To determine if there is a change in spinal reflex excitability, corticospinal excitability, quadriceps strength, hip strength, knee range of motion (ROM), hip ROM, core endurance, balance and vertical jump from baseline to four weeks post-initiation of the intervention; and whether any of those changes affect changes in knee abduction angle during a jump landing task from baseline to four weeks post-initiation of the intervention. Design: Descriptive observational study. Setting: Research Laboratory. Subjects: A total of 48 healthy females participated in this study, and were split into two groups: feedback (n=32; age: 19.72±1.49 years; height: 159.15±12.27 cm; mass: 58.24±7.80 kg) and control (n=16; age: 19.56±1.67 years; height: 159.23±11.08 cm; mass: 59.35±8.87 kg), and were included in final analysis. Measurements: The outcome measures included those retrieved through TMS (AMT, corticospinal excitability normalized to the M-response at 120, 130, and 140% of AMT, and H:M), gluteus strength (hip extension and abduction), quadriceps strength (knee extension), balance via the SEBT (anterior, posteromedial, posterolateral, and composite, normalized to leg length), hip ROM (hip extension, internal rotation and external rotation), knee ROM (knee flexion), core endurance (3-way plank and prone plank), and maximal vertical jump (2-footed maximum vertical jump normalized to standing reach height). Results: The feedback group and control group both decreased the time they were able to hold the prone plank from baseline to four weeks post-initiation of the intervention, F(1,46)= 15.132, P

Download or read book The Effects of Prophylactic Ankle Bracing on Knee and Hip Mechanics in Basketball Players During Jump Landing written by Riann K. Thayer and published by . This book was released on 2018 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: Many athletes of various sports have been required to wear ankle braces for prophylactic uses. Ankle braces have been shown to decrease range of motion in all directions, which means the main force absorption mechanism of the ankle may be inhibited. This decrease in force absorption at the ankle may increase the mechanical demands at the more proximal knee and hip joints. In this study, the change in knee, hip and lower back mechanics will be investigated to gain understanding as to whether bracing the ankle could create a higher injury potential. Methods: In this study, 12 intercollegiate basketball players (6 female, 6 male) participated during one session, in which each subject tested for each taping condition (self-adherent, adhesive cloth, and no tape). For each trial, the participants performed three maximum vertical jump trials and three depth drop trials, a 15-minute bout of exercise, and subsequently three more maximum vertical jumps and three more depth drops. The participants' lower body kinematics and kinetics were measured using 3D motion capture and force plates. Results: Analysis of ankle bracing pre- and post-exercise on lower extremity kinematics and kinetics through a two-way MANOVA yielded results that were not significant for any of the variables, including their interaction effect. There was no effect of the three different types of ankle bracing (control, adhesive, and self-adhesive), exercise (pre-and post-), or the interaction of those variables on peak hip flexion, peak knee flexion, peak knee moment, peak hip moment, and peak lumbosacral moment. Conclusion: Ankle bracing had no effect on selected lower body kinematics and kinetics. More research should be done to better understand whether ankle bracing has the potential to increase injury at other joints.

Download or read book The Role of the Pilates TM Approach on Jump Performance Jump Landing Ability and Sport Anxiety on Collegiate Basketball and Volleyball Players written by Ines Cardoso da Costa Ventura and published by . This book was released on 2020 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Improper dynamic knee joint alignment during pivoting and jumping tasks is associated with large joint, tendon and ligament forces and may lead to both overuse and acute knee injuries like patellofemoral pain (PFP) and anterior cruciate ligament (ACL) injury. Due to athletes’ jumping ability being a key component in basketball and volleyball, both athletes and coaches research search for different methods to enhance vertical jump (VJ) performance. Biomechanical variables including decreased knee flexion angle and internal knee extension moment and increased knee abduction angle and internal knee abduction moment during the landing phase of jumping activities are important risk factors for injury that can be altered by implementing a Pilates exercise program. These are also important variables in jumping ability and can also be altered by implementing a Pilates exercise program. Collegiate athletes experience high levels of anxiety that can alter their performance as well as commitment to performance. Competitive state anxiety was the dependent variable chosen to assess athlete’s mental health. Eight subjects were randomly assigned to either the intervention (Pilates) group (n=4) or the control group (n=4). The intervention (Pilates) group participated in two sessions per week for a duration of four weeks in the Pilates exercise program. Analysis of these biomechanical variables during a countermovement jump (CMJ) and drop jump (DJ) using Visual 3D was done in two time points (pre and post program). Analysis of the mental health variable was done in two time points as well (pre and post program). Only the left knee CMJ extension moment showed increased values in the intervention (Pilates) group (p=0.007). This increase is important for a proper landing from a jump with controlled knee joint motion and consequently, reduced knee injury risk during the DJ. The intervention (Pilates) group did show other trends for biomechanical improvement, as well as for the competitive state anxiety. This could mean that even though the Pilates program was only four weeks, it was enough to start seeing some changes regarding the variables assessing the performance in the jump height and injury prevention, but not enough to see changes in the athlete’s mental health.

Download or read book Estimation of Muscle Torque Impulses and Ability to Predict High risk Knee Joint Mechanics During Landing Maneuvers written by Jerome Jean Sauret and published by . This book was released on 2011 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This research first examined the validity of net knee joint moment estimations, calculated as the difference between quadriceps and hamstrings torques estimated using either an isometric or angle and action specific sEMG/Torque ratio calculated during calibration actions, during the impact phase of the initial landing of a drop jump maneuver. Second, this research investigated the extent to which the torque impulses of the medial and lateral aspects of the quadriceps and hamstrings, estimated during the impact phase of the initial landing of a drop jump maneuver using an angle and action specific sEMG/Torque ratio predicted knee joint mechanics associated with ACL injury risk, in the three planes of motion. Forty healthy active females, between the ages of 18 and 25, participated in the study. Participants performed maximal calibration actions on an isokinetic dynamometer (eccentric and isometric quadriceps, concentric and isometric hamstrings) while surface electromyographic (sEMG) data were collected from the vastus lateralis, vastus medialis, bicep femoris and semitendinous. Subsequently, a drop jump maneuver was performed while three dimensional biomechanical data as well as sEMG data from the above mentioned muscles were collected. Based on the calibration actions, individualized isometric as well as angle and action specific (eccentric quadriceps, concentric hamstrings) sEMG/Torque ratios (sEMG amplitude divided by half of the torque produced) were computed for each of the four muscles, from full extension to 90 degrees of knee flexion. Using the knee flexion data during the landing maneuver, the sEMG/Torque ratio was then estimated for the impact phase of the drop jump maneuver. It was then divided by the concurrently acquired sEMG to estimate torques for the four afore mentioned muscles during the impact phase of landing. Muscle torques were resolved into a net joint moment as the difference between the sum of the extensors and flexors, and the impulses were then calculated for each of the muscle torques and for the net joint moments. High risk knee joint mechanics, in the three planes of motion, were observed during the impact phase of the initial landing of the drop jump. A RMANOVA tested differences between the net joint moments estimated based on isometric or angle and action specific measurements and inverse dynamics analysis. Regression models assessed the extent to which the muscle torque impulses, estimated using the angle and action specific sEMG/Torque ratio during the impact phase of the initial landing of a drop jump maneuver, predicted each of the seven variables identified as high risk knee joint mechanics. First, the results revealed that net knee joint moment based on the angle and action specific sEMG/Torque ratio provided a closer estimation of the net knee joint moment calculated using an inverse dynamics analysis than the net knee joint moment based on the isometric sEMG/Torque ratio. Second, muscle torque impulses, estimated using the angle and action specific sEMG/Torque ratio, were significantly predictive of only frontal and transverse moments about the knee. Secondary analyses revealed that when including simple ground contact kinematic variables and impact phase duration into the regression models, muscle torques predictivity of high risk knee joint biomechanics often increased. Hence, it was concluded that the angle and action specific sEMG/Torque ratio provides a better estimation of sagittal joint moments than the traditional isometric approach to sEMG normalization. Future studies should investigate the factors influencing ground contact knee joint kinematics and impact phase duration during the initial landing of a drop jump maneuver."--Abstract from author supplied metadata.

Download or read book An Investigation of the Relationship Between Impact Force Attenuation in Landing and Isokinetic Strength of Knee Muscles in Individuals with Different Training Backgrounds written by and published by . This book was released on 2008 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Skeletal muscle is a major active mechanism of impact force attenuation in human movement. During the landing phase impact attenuation is achieved through eccentric contraction of the muscles of the lower extremity. However, few studies have investigated the effects of knee strength, especially eccentric strength, on impact attenuation during landing. Therefore the relationship was assessed in fourteen healthy, male volunteers. Seven NCAA Division I College football players (TRAINED) and seven recreationally active university students with limited sport training or competitive sport background (REC) participated in two testing sessions. Isokinetic testing of the knee extensor and flexor muscles was performed concentrically at 60 and 180 degree·sec−1, and eccentrically at 60 degree·sec−1. 3D kinematic and ground reaction force (GRF) data were collected during drop landings from heights of 40, 60cm and 100% of each individuals maximum jump height. The TRAINED had greater concentric strength, vertical jump height, but no significant differences existed in the eccentric strength (336 vs 340 N.m/kg) between the groups. The TRAINED had marginally greater peak GRFs (2.7 & 3.5 BW vs 2.0 & 2.7 BW for 40 and 60 cm, p=0.051) and significantly less time to the peak (0.048 & 0.043 s vs 0.060 & 0.053) compared to the REC in drop landing. The TRAINED used less but non-significant knee flexion range of motion ( -60.7 & -54.1 degree vs -62.7 & -69.6 degree) during drop landing than the REC. There were high, positive and significant correlations between the peak eccentric knee extensor torque and time to the first and second peak GRF. Despite all their training the results did not find any significant differences in eccentric strength of the TRAINED subjects in comparison to their REC counterparts. The TRAINED subjects adopted a stiffer landing strategy to deal effectively with high impact loading during landing. Future research is warranted in investigating impact attenuation in landing of participants with significantly different eccentric strength.

Download or read book The Effect of Ankle Prophylactic Bracing on Kinematics of the Lower Body when Landing from a Vertical Jump written by Joshua Paul Rayburn and published by . This book was released on 2014 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study is to investigate the effects of the ASO ankle brace and the closed Gibney ankle taping method on kinematics of the lower body when landing from a vertical jump. By observing lower limb joint angular kinematics during landing this study may help to identify if ankle prophylactic bracing may increase the potential risk of injury to the more proximal unstabilized knee and hip joints. For this study, 10 females (age: 18-24 years), were randomly selected from a group (N= 24) of well-trained intercollegiate athletes, who had been competitive for at least 4 years in a jumping sport.

Download or read book The Effects of 6 Weeks of Hip strengthening Exercises on Drop Jump Performance in Middle School Students written by Blake Corl-Baietti and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The anterior cruciate ligament is the most frequently injured ligament in youth ages 8-14 (years) in the United States. This injury is often observed with abnormal valgus knee posture during dynamic landing tasks. Improvement of hip muscle function has positive associations with increasing lower extremity dynamic task competency. Much remains unknown with respect to the merit of integrating hip muscle-specific exercise programs in the aged 8-14 population for improving knee posture during jump landing. Therefore, the purpose of this investigation was to quantify the effects of 6-weeks of hip strengthening exercises on frontal plane knee position in the drop jump test with 7th-grade middle school students. The authors hypothesized that compared to the age-matched control group, the strength training group will show significant changes in frontal plane knee position, specifically a reduction in knee valgus, during drop landings. This intervention study included 57 youth (ages 12-13), who were randomly placed in an experimental or control group. First, to ascertain baseline knee position, all particpants were recorded performing the drop jump test facing a high speed camera. Then, the experimental group performed a series of dynamic warm-up and hip muscle-focused exercises for six weeks, while the control group completed a general warm-up. Post-intervention, pre-test procedures were replicated. A two-way mixed ANOVA was used to measure changes in frontal plane knee position from pre- to post-intervention. Results indicated that the exercise group achieved significantly greater post-intervention improvement in frontal plane knee position on the right knee (p = 0.006), with a mean difference of 7.52° change from valgus to varus posture during landing compared to the control. Further, the exercise group's left knee significantly differed in post-intervention frontal plane knee position compared to that of the control (p = 0.011), by an average of 6.87°. Overall, with the intervention program the exercise group landed in a less valgus position from pre- to post-test. Six weeks of dynamic warm-up and hip muscle-focused exercises was effective in generating significant changes in frontal plane knee position during the landing phase of a drop jump in male and female 7th-grade middle school students.

Download or read book Landing Technique Assessment Utilizing Laboratory based Landing and Simulated Basketball Landing Tasks written by Hiromi Kowata and published by . This book was released on 2014 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Author's abstract: Context: The Landing Error Scoring System (LESS) is a two-dimensional landing technique assessment tool that is readily available to clinicians. However, the LESS merely assesses a contrived landing, rather than dynamic, complex movements that may occur during actual athletic performance. Objective: To compare the LESS scores and knee joint kinematics between the LESS vertical-drop jump (DVJ), and two simulated basketball landing performances, jump-stop jump shot (JS) and rebounding (RB). Design: Prospective, cross-sectional study. Setting: An intramural basketball court. Participants: Twenty-five female recreational basketball players (Age: 20.96±1.70, Height (cm): 166.07 ± 9.10, Weight (kg): 68.54 ±12.17). Intervention(s): Participants performed the DVJ, JS, and RB. All landing performances were video-recorded and kinematics were analyzed using Dartfish. Results: LESS scores were significantly different between DVJ (5.97±1.43) and JS (8.75±0.94) (p

Download or read book The Young Female Athlete written by Cynthia J. Stein and published by Springer. This book was released on 2016-04-27 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Utilizing a multidisciplinary approach and drawing on the experience of experts in their respective fields, this unique book presents and discusses an array of topics relevant to the ever-growing population of pediatric, adolescent and young adult female athletes. Each topic is clearly defined and includes epidemiology, diagnosis, treatment and future directions. Opening chapters discuss growth and development, sports nutrition, resistance training, and psychological considerations for the young female athlete, with a chapter focusing on the female athlete triad. Later chapters present injuries and management strategies common to the young female athlete, such as overuse injuries, spondylolysis, hip and ACL injuries, concussion, and cardiovascular complications. The concluding chapter considers the benefits of physical activity for chronic disease prevention later in life. The Young Female Athlete provides useful, up-to-date information for any practitioner treating this active population, encouraging sports participation with fitness, injury prevention, personal growth, and long-term health.