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https://www.readbyqxmd.com/read/28517613/a-quantitative-method-to-the-analysis-of-mlc-leaf-position-and-speed-based-on-epid-and-ebt3-film-for-dynamic-imrt-treatment-with-different-types-of-mlc
#1
Yinghui Li, Lixin Chen, Jinhan Zhu, Bin Wang, Xiaowei Liu
A quantitative method based on the electronic portal imaging system (EPID) and film was developed for MLC position and speed testing; this method was used for three MLC types (Millennium, MLCi, and Agility MLC). To determine the leaf position, a picket fence designed by the dynamic (DMLC) model was used. The full-width half-maximum (FWHM) values of each gap measured by EPID and EBT3 were converted to the gap width using the FWHM versus nominal gap width relationship. The algorithm developed for the picket fence analysis was able to quantify the gap width, the distance between gaps, and each individual leaf position...
May 18, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28509631/improving-balance-mobility-and-dual-task-performance-in-an-adolescent-with-cerebral-palsy-a-case-report
#2
Sarah Fisher-Pipher, Lisa K Kenyon, Marci Westman
BACKGROUND AND PURPOSE: Improving functional mobility is often a desired outcome for adolescents with cerebral palsy (CP). Traditional neurorehabilitation approaches are frequently directed at impairments; however, improvements may not be carried over into functional mobility. The purpose of this case report was to describe the examination, intervention, and outcomes of a task-oriented physical therapy intervention program to improve dynamic balance, functional mobility, and dual-task performance in an adolescent with CP...
May 16, 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/28506451/motor-skill-development-in-low-income-at-risk-preschoolers-a-community-based-longitudinal-intervention-study
#3
Laura L Bellows, Patricia L Davies, Jimikaye B Courtney, William J Gavin, Susan L Johnson, Richard E Boles
OBJECTIVES: This study aimed to: (1) determine the status of fundamental movement skill (FMS) performance in low-income, at-risk preschoolers; and (2) evaluate the impact of the Food Friends Get Movin' with Mighty Moves (MM) program on improving children's FMS at two-year follow-up. DESIGN: Longitudinal, quasi-experimental study with matched controls. METHODS: The Colorado LEAP study was conducted in four Head Start/preschools (two intervention, two control) serving children aged 3-5 years...
April 26, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28488829/analyzing-the-relationship-between-anthropometric-and-motor-indices-with-basketball-specific-pre-planned-and-non-planned-agility-performances
#4
Miran Pehar, Nedim Sisic, Damir Sekulic, Milan Coh, Ognjen Uljevic, Miodrag Spasic, Ante Krolo, Kemal Idrizovic
BACKGROUND: Although agility is an important quality in basketball, factors associated with basketball specific pre-planned-agility (change-of-direction-speed - CODS) and non- planned-agility (reactive agility - RA) are rarely investigated. The aim of this study was to evaluate relationship between anthropometric and motor indices with basketball-specific CODS and RA in male basketball players of high performance level. METHODS: We tested 88 high-level male basketball players (height: 194...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28452186/eocene-paleoecology-of-adapis-parisiensis-primate-adapidae-from-inner-ear-to-lifestyle
#5
Margot Bernardi, Sébastien Couette
European adapids, especially Adapis parisiensis, have been extensively studied over the past two centuries, essentially for taxonomic and phylogenetic purposes. Analyses of dental, cranial and postcranial morphology have led to various hypotheses about the diet, locomotion and lifestyle of this fossil primate species. As the morphology of Adapis parisiensis is not directly comparable to any extant species, some interpretations are still debated. The inner ear is crucial to several functional parameters, such as auditory acuity, balance, agility, orientation and head motion speed during locomotion...
April 27, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28422524/straight-line-and-change-of-direction-intermittent-running-in-professional-soccer-players
#6
Mohamed S Fessi, Fayçal Farhat, Alexandre Dellal, James J Malone, Wassim Moalla
PURPOSE: The present study aimed to investigate the difference between straight-line (STL) and change of direction (COD) intermittent running exercises in soccer players. METHODS: Seventeen male professional soccer players performed the agility T-test and 6 intermittent running exercises: 10s at 130% of maximal aerobic speed (MAS) alternated with 10s of rest (10-10), 15s at 120% of MAS alternated with 15s of rest (15-15) and 30s at 110% of MAS alternated with 30s of rest (30-30) both in STL and with COD...
April 19, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28416892/anthropometric-and-physical-characteristics-allow-differentiation-of-young-female-volleyball-players-according-to-playing-position-and-level-of-expertise
#7
M Milić, Z Grgantov, K Chamari, L P Ardigò, A Bianco, J Padulo
The aim of our study was to determine the differences in some anthropometric and physical performance variables of young Croatian female volleyball players (aged 13 to 15) in relation to playing position (i.e., independent variable) and performance level within each position (i.e., independent variable). Players were categorized according to playing position (i.e., role) as middle blockers (n=28), opposite hitters (n=41), passer-hitters (n=54), setters (n=30), and liberos (n=28). Within each position, players were divided into a more successful group and a less successful group according to team ranking in the latest regional championship and player quality within the team...
March 2017: Biology of Sport
https://www.readbyqxmd.com/read/28397712/design-of-hair-like-appendages-and-comparative-analysis-on-their-coordination-toward-steady-and-efficient-swimming
#8
Bokeon Kwak, Joonbum Bae
Locomotion of water beetles have been widely studied in biology owing to their remarkable swimming skills. Inspired by the oar-like legs of water beetles, designing a robot that swims under the principle of drag-powered propulsion can lead to highly agile mobility. But its motion can easily be discontinuous and jerky due to backward motions (i.e., retraction) of the legs. Here we proposed novel hair-like appendages and considered their coordination to achieve steady and efficient swimming on the water surface...
April 11, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28368952/physical-determinants-of-division-1-collegiate-basketball-women-s-national-basketball-league-and-women-s-national-basketball-association-athletes-with-reference-to-lower-body-sidedness
#9
Tania Spiteri, Molly Binetti, Aaron T Scanlan, Vincent J Dalbo, Filippo Dolci, Christina Specos
In female basketball the assumed components of success include power, agility, and the proficiency at executing movements using each limb. However, the importance of these attributes in discriminating between playing levels in female basketball have yet to be determined. The purpose of this study was to compare lower body power, change of direction (COD) speed, agility, and lower-body sidedness between basketball athletes participating in Division 1 Collegiate basketball (United States), Women's National Basketball League (WNBL) (Australia), and Women's National Basketball Association (WNBA) (United States)...
March 31, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28345503/physical-fitness-and-shapes-of-subcortical-brain-structures-in-children
#10
Francisco B Ortega, Daniel Campos, Cristina Cadenas-Sanchez, Signe Altmäe, Cristina Martínez-Zaldívar, Miguel Martín-Matillas, Andrés Catena, Cristina Campoy
A few studies have recently reported that higher cardiorespiratory fitness is associated with higher volumes of subcortical brain structures in children. It is, however, unknown how different fitness measures relate to shapes of subcortical brain nuclei. We aimed to examine the association of the main health-related physical fitness components with shapes of subcortical brain structures in a sample of forty-four Spanish children aged 9·7 (sd 0·2) years from the NUtraceuticals for a HEALthier life project...
March 27, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28344461/within-session-sequence-of-balance-and-plyometric-exercises-does-not-affect-training-adaptations-with-youth-soccer-athletes
#11
Mehdi Chaouachi, Urs Granacher, Issam Makhlouf, Raouf Hammami, David G Behm, Anis Chaouachi
The integration of balance and plyometric training has been shown to provide significant improvements in sprint, jump, agility, and other performance measures in young athletes. It is not known if a specific within session balance and plyometric exercise sequence provides more effective training adaptations. The objective of the present study was to investigate the effects of using a sequence of alternating pairs of exercises versus a block (series) of all balance exercises followed by a block of plyometric exercises on components of physical fitness such as muscle strength, power, speed, agility, and balance...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28344446/prediction-of-tennis-performance-in-junior-elite-tennis-players
#12
Tamara Kramer, Barbara C H Huijgen, Marije T Elferink-Gemser, Chris Visscher
Predicting current and future tennis performance can lead to improving the development of junior tennis players. The aim of this study is to investigate whether age, maturation, or physical fitness in junior elite tennis players in U13 can explain current and future tennis performance. The value of current tennis performance for future tennis performance is also investigated. A total of 86 junior elite tennis players (boys, n = 44; girls, n = 42) U13 (aged: 12.5 ± 0.3 years), and followed to U16, took part in this study...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28323803/patient-response-to-an-integrated-orthotic-and-rehabilitation-initiative-for-traumatic-injuries-the-prioriti-mtf-study
#13
Joseph R Hsu, Johnny G Owens, Jennifer DeSanto, John R Fergason, Kevin M Kuhn, Benjamin K Potter, Daniel J Stinner, Robert G Sheu, Sandra L Waggoner, Jason M Wilken, Yanjie Huang, Daniel O Scharfstein, Ellen J MacKenzie
Although limb salvage is now possible for many high-energy open fractures and crush injuries to the distal tibia, ankle, hindfoot, and midfoot, orthotic options are limited. The Intrepid Dynamic Exoskeletal Orthosis (IDEO) is a custom, energy-storing carbon fiber orthosis developed for trauma patients undergoing limb salvage. The IDEO differs from other orthoses in that it allows patients with ankle weakness to have more normal ankle biomechanics and increased ankle power. This article describes the design of a study to evaluate the effectiveness of the IDEO when delivered together with a high-intensity, sports medicine-based approach to rehabilitation...
April 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28315285/effects-of-plyometric-training-on-physical-fitness-in-prepuberal-soccer-athletes
#14
Yassine Negra, Helmi Chaabene, Senda Sammoud, Raja Bouguezzi, Mohamed Aymen Abbes, Younés Hachana, Urs Granacher
This study aimed at examining the effects of plyometric training on stable (SPT) vs. unstable (UPT) surfaces on physical fitness in prepuberal soccer players. Male athletes were randomly assigned to SPT (n=18; age=12.7±0.2 years) or UPT (n=16; age=12.2±0.5 years). Both groups conducted 3 regular soccer training sessions per week combined with either 2 SPT or UPT sessions. Assessment of jumping ability (countermovement jump [CMJ], and standing long jump [SLJ]), speed (10-m, 20-m, 30-m sprint), agility (Illinois agility test [IAT]), and balance (stable [SSBT], unstable [USBT] stork balance test; stable [SYBT], unstable [UYBT] Y balance test) was conducted pre-and post-training...
May 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28264903/longitudinal-quasi-static-stability-predicts-changes-in-dog-gait-on-rough-terrain
#15
Simon Wilshin, Michelle A Reeve, G Clark Haynes, Shai Revzen, Daniel E Koditschek, Andrew J Spence
Legged animals utilize gait selection to move effectively and must re-cover from environmental perturbations. We show that on rough terrain domestic dogs, Canis lupus familiaris, spend more time in longitudinal quasi-statically stable patterns of movement. Here longitudinal refers to the rostro-caudal, axis. We used an existing model in the literature to quantify the longitudinal quasi-static stability of gaits neighbouring the walk, and found that trot-like gaits are more stable. We thus hypothesized that when perturbed, the rate of return to a stable gait would depend on the direction of perturbation, such that perturbations towards less quasi-statically stable patterns of movement would be more rapid than those towards more stable patterns of movement...
March 6, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28263670/proximal-neuromuscular-control-protects-against-hamstring-injuries-in-male-soccer-players-a-prospective-study-with-electromyography-time-series-analysis-during-maximal-sprinting
#16
Joke Schuermans, Lieven Danneels, Damien Van Tiggelen, Tanneke Palmans, Erik Witvrouw
BACKGROUND: With their unremittingly high incidence rate and detrimental functional repercussions, hamstring injuries remain a substantial problem in male soccer. Proximal neuromuscular control ("core stability") is considered to be of key importance in primary and secondary hamstring injury prevention, although scientific evidence and insights on the exact nature of the core-hamstring association are nonexistent at present. HYPOTHESIS: The muscle activation pattern throughout the running cycle would not differ between participants based on injury occurrence during follow-up...
May 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28231260/effects-of-the-skills4genius-sports-based-training-program-in-creative-behavior
#17
Sara Santos, Sergio Jiménez, Jaime Sampaio, Nuno Leite
Team Sports has been suggested as a suitable environment to investigate creative behavior. This study's purpose was two-fold: first, it intended to identify the effects of the Skills4Genius sports-bases training program in thinking, motor, and in-game creative behavior in team sports. Second, it aimed to investigate the relationship between creative thinking and in-game creativity. Forty children from primary school were allocated into control (n = 18, age: 9.2±0.4) and experimental (n = 22, age: 9.5±0.7) groups...
2017: PloS One
https://www.readbyqxmd.com/read/28211843/performance-and-metabolic-demand-of-a-new-repeated-sprint-ability-test-in-basketball-players-does-the-number-of-changes-of-direction-matter
#18
Alessandro M Zagatto, Luca P Ardigò, Fabio A Barbieri, Fabio Milioni, Antonio Dello Iacono, Bruno H F Camargo, Johnny Padulo
This study compared two repeated-sprint ability tests in basketball players. Both tests included 10×30-m sprints, with the difference that the previously validated test (RSA2COD) featured two changes of direction (COD) per sprint, while the experimental test (RSA5COD) featured five CODs per sprint. Tests` performances and metabolic demands were specifically assessed in 20 basketball players. Firstly, RSA5COD test-retest reliability was investigated. Then RSA2COD, RSA5COD sprint times, peak speeds, oxygen uptake (VO2) and post-test blood lactate concentration [La] were measured...
November 5, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28205417/muscle-activation-and-heart-rate-responses-to-a-side-step-interval-exercise
#19
Robert S Thiebaud, Takashi Abe, Jonathan C Bravo, Nicolas Giovannitti, Avery P Sullivan
BACKGROUND: The side-step test is commonly used to assess agility. Side-step interval exercise may also be a potential way to improve cardiorespiratory and muscular fitness. However, the acute heart rate and muscle activation response to this type of exercise is not well established. In addition, different tempos can influence these responses. The purpose of this study was to determine the acute heart rate and muscle activation responses of a side-step interval exercise to different exercise tempos...
February 16, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28193269/how-flies-are-flirting-on-the-fly
#20
Courtney Eichorn, Michael Hrabar, Emma C Van Ryn, Bekka S Brodie, Adam J Blake, Gerhard Gries
BACKGROUND: Flies have some of the most elaborate visual systems in the Insecta, often featuring large, sexually dimorphic eyes with specialized "bright zones" that may have a functional role during mate-seeking behavior. The fast visual system of flies is considered to be an adaptation in support of their advanced flight abilities. Here, we show that the immense processing speed of the flies' photoreceptors plays a crucial role in mate recognition. RESULTS: Video-recording wing movements of abdomen-mounted common green bottle flies, Lucilia sericata, under direct light at 15,000 frames per second revealed that wing movements produce a single, reflected light flash per wing beat...
February 14, 2017: BMC Biology
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