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speed and agility

Sofía Pestoni, Federico Javier Degrange, Claudia Patricia Tambussi, María Manuela Demmel Ferreira, Germán Alfredo Tirao
The cranio-mandibular complex is an important structure involved in food capture and processing. Its morphology is related to the nature of the food item. Jaw muscles enable the motion of this complex and their study is essential for functional and evolutionary analysis. The present study compares available behavioral and dietary data obtained from the literature with novel results from functional morphological analyses of the cranio-mandibular complex of the Guira cuckoo (Guira guira) to understand its relationship with the zoophagous trophic habit of this species...
March 13, 2018: Journal of Morphology
Eero A Haapala, Niina Lintu, Aino-Maija Eloranta, Taisa Venäläinen, Anna-Maija Poikkeus, Timo Ahonen, Virpi Lindi, Timo A Lakka
We investigated the associations of cardiometabolic risk factors with academic achievement and whether motor performance, cardiorespiratory fitness, physical activity, or sedentary behaviour mediated these associations. Altogether 175 children 6-8 years-of-age participated in the study. We assessed body fat percentage (BF%), waist circumference, insulin, glucose, triglycerides, HDL cholesterol, and systolic and diastolic blood pressure, leptin, alanine aminotransferase, and gamma-glutamyltransferase (GGT)...
March 9, 2018: Journal of Sports Sciences
Mengjun Shi, Nan He, Wenjing Li, Changqin Li, Wenyi Kang
In this study, the contents of myricetrin, quercitrin and afzelin in Cercis chinensis leaves were determined simultaneously by 1-butyl-3-methylimidazolium tetrafluoroborate [BMIM] BF4 /70% ethanol microextraction combined with High Performance Liquid Chromatograph (HPLC) analysis. The mobile phase was eluted with an Agilent ZORBAX SB-C18 column (4.6 mm×5 mm, 5 μm), B was methanol and C was 0.1% glacial acetic acid-water as the mobile phase. The flow rate was 0.8 mL min-1 , eluents was detected at 245 nm at column temperature of 30 °C...
March 1, 2018: Chemistry Central Journal
Maria C Madueno, Vincent J Dalbo, Joshua H Guy, Kate E Giamarelos, Tania Spiteri, Aaron T Scanlan
PURPOSE: To investigate the physiological and performance effects of active and passive recovery between repeated-change-of-direction (RCOD) sprints. METHODS: Eight semi-professional basketball players (age: 19.9 ± 1.5 yr; stature: 183.0 ± 9.6 cm; body mass: 77.7 ± 16.9 kg; body fat: 11.8 ± 6.3%; VO2peak : 46.1 ± 7.6 mL·kg-1 ·min-1 ) completed 12 x 20-m RCOD sprints (Agility 5-0-5 Tests) interspersed with 20 s of active (50% maximal aerobic speed) or passive recovery in a randomized cross-over design...
February 21, 2018: International Journal of Sports Physiology and Performance
Annie Chappell, Noula Gibson, Susan Morris, Gavin Williams, Garry T Allison
BACKGROUND: Running is a fundamental motor skill which is important for participation in recreational activities throughout the lifespan. AIM: To identify, appraise, and synthesize the evidence related to running in people with cerebral palsy (CP). METHOD: A search of electronic databases was conducted in April 2016. Articles were reviewed by two assessors and had to meet the following criteria: 1) population included people with CP; and 2) included information about running...
February 6, 2018: Physiotherapy Theory and Practice
Neal Wen, Vincent J Dalbo, Bill Burgos, David B Pyne, Aaron T Scanlan
Numerous foundational movements performed during basketball are predicated on underlying power-related attributes, including speed, change-of-direction, and jumping. Accordingly, fitness testing batteries for basketball have incorporated an assortment of linear speed tests, change-of-direction tests, and jump tests. However, due to the wide variety of testing options it is difficult for basketball practitioners to select appropriate testing protocols for the assessment of power-related attributes. As a result, there is a need to review the relevant literature to identify game-specific, power-related attributes important in basketball and the most appropriate tests available to assess power-related attributes for basketball practitioners...
February 1, 2018: Journal of Strength and Conditioning Research
Takashi Hanakawa, Andrew M Goldfine, Mark Hallett
Distinct regions of the frontal cortex connect with their basal ganglia and thalamic counterparts, constituting largely segregated basal ganglia-thalamo-cortical (BTC) circuits. However, any common role of the BTC circuits in different behavioral domains remains unclear. Indeed, whether dysfunctional motor and cognitive BTC circuits are responsible for motor slowing and cognitive slowing, respectively, in Parkinson's disease (PD) is a matter of debate. Here, we used an effortful behavioral paradigm in which the effects of task rate on accuracy were tested in movement, imagery, and calculation tasks in humans...
November 2017: ENeuro
Marcos André M Dos Santos, Alan M Nevill, Rojapon Buranarugsa, Sara Pereira, Thayse Natacha Q Ferreira Gomes, Ana Reyes, Lisa M Barnett, José António R Maia
Children change their body size, shape and gross motor coordination (GMC) as they grow. Further, GMC is expected to link to changes in children's body size, physical activity (PA) and physical fitness (PF). The objective was to model GMC changes in children followed longitudinally and to investigate associations between these changes and PA and PF levels. A total of 245 children (122 girls) were observed at 6 years of age and followed annually until 9 years. A sequence of allometric models were fitted, i.e...
January 24, 2018: Scandinavian Journal of Medicine & Science in Sports
Bogja Jeoung
The purpose of this study was to evaluate the relationship between sitting volleyball performance and the field fitness of sitting volleyball players. Forty-five elite sitting volleyball players participated in 10 field fitness tests. Additionally, the players' head coach and coach assessed their volleyball performance (receive and defense, block, attack, and serve). Data were analyzed with SPSS software version 21 by using correlation and regression analyses, and the significance level was set at P< 0.05...
December 2017: Journal of Exercise Rehabilitation
Ahmad Hafez, Rahul Raj, Michael T Lawton, Mika Niemelä
Background: Neurosurgeons devoted to bypass neurosurgery or revascularization neurosurgery are becoming scarcer. From a practical point of view, "bypass neurosurgeons" are anastomosis makers, vessels technicians, and time-racing repairers of vessel walls. This requires understanding the key features and hidden tricks of bypass surgery. The goal of this paper is to provide simple and inexpensive tricks for taming the art of bypass neurosurgery. Most of these tricks and materials described can be borrowed, donated, or purchased inexpensively...
2017: Surgical Neurology International
Jorge Lopez-Fernandez, Javier Sánchez-Sánchez, Jorge García-Unanue, José Luis Felipe, Enrique Colino-Acevedo, Leonor Gallardo
PURPOSE: Recent studies have shown that soccer player's responses are similar on natural grass (NG) and artificial turf (AT), but they did not control the mechanical properties of these surfaces. This work aimed to analyse the influence of the game surface on amateur soccer player's physical and physiological responses using a soccer simulation protocol (SSP). METHODS: Sixteen amateur players performed three bouts of the SSP on AT and NG. The mechanical properties of both surfaces were recorded...
December 28, 2017: International Journal of Sports Physiology and Performance
Jade A Z Haycraft, Stephanie Kovalchik, David B Pyne, Sam Robertson
BACKGROUND: Australian football (AF) players require endurance, strength, speed, and agility to be successful. Tests assessing physical characteristics are commonly used for talent identification; however, their ability to differentiate between players across the Australian Football League's (AFL) participation pathway remains unclear. The objective of this review was to quantify the physical characteristics of male AF players across the AFL participation pathway. METHODS: A search of databases was undertaken...
December 19, 2017: Sports Medicine—Open
Jennifer C Reneker, Lisa Latham, Ryan McGlawn, Matthew R Reneker
OBJECTIVE: Establish the effectiveness of kinesiology tape (KT) on sports performance abilities compared to that of other tapes or no tape with consideration to the application methodology, timeframe, and outcome measurement. METHODS: PubMed, Embase, and PEDro databases were systematically searched. The following inclusion criteria were applied: 1) participants were healthy athletes, 2) compared any brand of dynamic KT to other types of tape (sham or therapeutic) and/or no tape, 3) measured some construct of functional sports performance, 4) involved randomization...
October 9, 2017: Physical Therapy in Sport
Sarah J de la Motte, Peter Lisman, Timothy C Gribbin, Kaitlin Murphy, Patricia A Deuster
We performed a systematic review and evaluation of the existing scientific literature on the association between flexibility, power, speed, balance, and agility, and musculoskeletal injury (MSK-I) risk in military and civilian populations. MEDLINE, EBSCO, EMBASE, and the Defense Technical Information Center were searched for original studies published from 1970 through 2015 that examined associations between these physical fitness measures (flexibility, power, speed, balance, and agility) and MSK-I. Methodological quality and strength of the evidence were determined following criteria adapted from previously published systematic reviews...
December 11, 2017: Journal of Strength and Conditioning Research
Souhail Hermassi, Mohamed Souhail Chelly, Georg Fieseler, Thomas Bartels, Stephan Schulze, Karl-Stefan Delank, Roy J Shepard, René Schwesig
Muscular strength and speed are critical physical factors in determining the technical and tactical skills of elite team handball players. This study thus investigated the effect of high-intensity muscular strength and sprint interval training (SIT) on lower limb explosive performance and anthropometric characteristics in 22 male handball athletes aged 20.2 ± 0.1 years. A training group (TG, n = 12) and a control group (CG, n = 10) were followed over 8 weeks parallel to regular handball training...
December 2017: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
Maamer Slimani, Pantelis T Nikolaidis
BACKGROUND: The aim of the present systematic review was to profile soccer players' anthropometric, physiological, and physical attributes relative to different competitive levels, playing positions and age groups. METHODS: The systematic search was conducted using different databases and according to the Population/Intervention or Exposure/Comparison/Outcome(s) [PICO] criteria. RESULTS: The present review shows that the somatotype characteristics, percentage (%) of body fat, maximal oxygen uptake (VO2max), repeatedsprint ability (RSA), running speed, strength, and muscular power of the lower limbs were the most powerful discriminators between male soccer players of different competitive levels, playing positions, and age groups...
December 1, 2017: Journal of Sports Medicine and Physical Fitness
Grant R Tomkinson, Kevin D Carver, Frazer Atkinson, Nathan D Daniell, Lucy K Lewis, John S Fitzgerald, Justin J Lang, Francisco B Ortega
OBJECTIVE: To develop sex-specific and age-specific normative values for the nine Eurofit tests in European children and adolescents aged 9-17 years. METHODS: A systematic review was undertaken to identify papers that explicitly reported descriptive results for at least one of nine Eurofit tests (measuring balance, muscular strength, muscular endurance, muscular power, flexibility, speed, speed-agility and cardiorespiratory fitness (CRF)) on children and adolescents...
November 30, 2017: British Journal of Sports Medicine
Matt Greig, James Naylor
Background: Agility is a fundamental performance element in many sports, but poses a high risk of injury. Hierarchical modelling has shown that eccentric hamstring strength is the primary determinant of agility performance. Purpose: The purpose of this study was to investigate the relationship between knee flexor and extensor strength parameters and a battery of agility tests. Study Design: Controlled laboratory study. Methods: Nineteen recreational intermittent games players completed an agility battery and isokinetic testing of the eccentric knee flexors (eccH) and concentric knee extensors (conQ) at 60, 180 and 300°·s-1 ...
October 2017: International Journal of Sports Physical Therapy
Bao Chen, Zhengbo Liu, Yuwei Zhang, Wei Li, Yanjun Sun, Yufang Wang, Yanhua Wang, Yinshi Sun
Three polyacetylenes were isolated and purified from Platycodon grandiflorum A. DC for the first time by high-speed counter-current chromatography using a two-phase solvent system composed of hexane/ethyl acetate/methanol/water (1:31:1:31, v/v/v/v) and high-performance liquid chromatography with an Agilent ZORBAX(®) SB-C18 column (4.6 mm × 150 mm, 5 μm). After separation by high-speed counter-current chromatography and high-performance liquid chromatography, we obtained 3.5 mg of platetyolin A, 4.1 mg of platetyolin B, and 18...
November 18, 2017: Journal of Separation Science
Antonia M Zaferiou, Lauro Ojeda, Stephen M Cain, Rachel V Vitali, Steven P Davidson, Leia Stirling, Noel C Perkins
Running agility is required for many sports and other physical tasks that demand rapid changes in body direction. Quantifying agility skill remains a challenge because measuring rapid changes of direction and quantifying agility skill from those measurements are difficult to do in ways that replicate real task/game play situations. The objectives of this study were to define and to measure agility performance for a (five-cone) agility drill used within a military obstacle course using data harvested from two foot-mounted inertial measurement units (IMUs)...
2017: PloS One
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