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speed and agility

Sutanu Dutta Chowdhury, Brian H Wrotniak, Tusharkanti Ghosh
The purpose of this study was to evaluate the relationship between body mass index and motor competence in Santal children 5-12 years old. A total of 816 Santal children were studied. Children's adiposity status was assessed by body mass index (BMI) for age z-score based on World Health Organization reference data. Motor competence was measured using the Bruininks-Oseretsky Test of Motor Competence (BOT-2). There was no significant difference in mean BMI z-score between Santal boys (0.13 ± 0.07) and girls (-0...
October 14, 2016: Journal of Motor Behavior
Tamara Kramer, Barbara Ch Huijgen, Marije T Elferink-Gemser, Chris Visscher
PURPOSE: To analyze how physical fitness (PF) improves in elite junior tennis players related to age, maturity, and performance level. METHODS: Elite junior tennis players (n=113 boys, n=83 girls) divided by performance level were monitored longitudinally from U14 to U16. Maturity, upper and lower body power, speed, and agility were measured during subsequent competitive seasons. Improvement was analyzed per sex using multilevel analysis. RESULTS: PF components for boys and girls improved over age (U14-U16) (ES ...
October 5, 2016: Pediatric Exercise Science
S Manderoos, N Wasenius, M K Laine, U M Kujala, E Mälkiä, J Kaprio, S Sarna, H M Bäckmand, J A Kettunen, O J Heinonen, A M Jula, S Aunola, J G Eriksson
The aim of this cross-sectional study was to compare mobility and muscle strength in male former elite endurance and power athletes aged 66-91 years (n = 150; 50 men in both former elite athlete groups and in their control group). Agility, dynamic balance, walking speed, chair stand, self-rated balance confidence (ABC-scale), jumping height, and handgrip strength were assessed. Former elite power athletes had better agility performance time than the controls (age- and body mass index, BMI-adjusted mean difference -3...
October 5, 2016: Scandinavian Journal of Medicine & Science in Sports
Cliodhna Sargent, Sean Lacey, Cormac Gebruers, Jim O'Mahony
BACKGROUND: A lack of research currently exists in relation to the current physical fitness testing system that is used within the Irish Naval Service, not only in relation to the tests that are used but also in relation to the scores that should be achieved in order to pass the test. As such the aim of this study was to select tests for various components of physical fitness and create a scoring system that could be used to assess individuals more comprehensively. MATERIALS AND METHODS: Seventy-five individuals took part in the study (71 males, 4 females)...
2016: International Maritime Health
Jérémy Vanhelst, Julien Labreuche Julien, Laurent Beghin, Elodie Drumez, Paul S Fardy, Didier Chapelot, Jacques Mikulovic, Zekya Ulmer
The aim of this study was to establish gender- and age-specific physical fitness percentiles in French youth. A sample of 11 186 children and adolescents (5 546 boys, 5 640 girls), ages 10-15 years, was assessed in the French national BOUGE study. Participants were tested on cardiorespiratory fitness, muscular endurance, speed, flexibility and agility using the following tests: 20-m shuttle run tests, curl ups test, 50-m sprint test, back-saver sit and reach test and 10 x 5 m shuttle run test. Percentile values were estimated for French youth as a function of age stratified by gender using the generalized additive model for location, scale and shape (GAMLSS)...
September 16, 2016: Journal of Strength and Conditioning Research
David E Cade, Ari S Friedlaender, John Calambokidis, Jeremy A Goldbogen
Rorqual whales exhibit an extreme lunge filter-feeding strategy characterized by acceleration to high speed and engulfment of a large volume of prey-laden water [1-4]. Although tagging studies have quantified the kinematics of lunge feeding, the timing of engulfment relative to body acceleration has been modeled conflictingly because it could never be directly measured [5-7]. The temporal coordination of these processes has a major impact on the hydrodynamics and energetics of this high-cost feeding strategy [5-9]...
October 10, 2016: Current Biology: CB
Damir Sekulic, Miran Pehar, Ante Krolo, Miodrag Spasic, Ognjen Uljevic, Julio Calleja-Gonzalez, Tine Sattler
The importance of agility in basketball is well known, but there is an evident lack of studies examining basketball-specific agility performances in high-level players. The aim of this study was to determine the reliability and discriminative validity of one standard agility-test (T-TEST), and four newly developed basketball-specific agility-tests, in defining playing-positions and performance-levels in basketball. The study comprised 110 high-level male basketball players (height: 194.92±8.09 cm; body mass: 89...
September 19, 2016: Journal of Strength and Conditioning Research
Bahram Sangelaji, Mohammadreza Kordi, Farzaneh Banihashemi, Seyed Massood Nabavi, Sara Khodadadeh, Maryam Dastoorpoor
BACKGROUND: Multiple sclerosis (MS) is a neurological disease with a variety of signs and symptoms. Exercise therapy has been shown to improve physical functions in MS. However, questions about an optimal exercise therapy remain. In this regard, we suggest a combined exercise therapy including aerobic and resistance exercises for MS patients. The study is designed to observe, test and compare the effects of proposed combined exercises on strength, balance, agility, fatigue, speed, and walking distance in people with mild to moderate MS [0 < expanded disability status scale (EDSS) < 5]...
July 6, 2016: Iranian Journal of Neurology
Gwang-Pil Jung, Kyu-Jin Cho
To improve the maneuverability and agility of jumping robots, several researchers have studied steerable jumping mechanisms. This steering ability enables robots to reach a particular target by controlling their jumping direction. To this end, we propose a novel direction-changing concept for miniature jumping robots. The proposed concept allows robots to be steerable while exerting minimal effects on jumping performance. The key design principles were adopted from the froghopper's power-producing hind legs and the moment cancellation accomplished by synchronized leg operation...
2016: Bioinspiration & Biomimetics
Jeison Alexander Ramos-Sepúlveda, Robinson Ramírez-Vélez, Jorge Enrique Correa-Bautista, Mikel Izquierdo, Antonio García-Hermoso
BACKGROUND: Substantial evidence indicates that children's physical fitness levels are markers of their lifestyles and their cardio-metabolic health profile and are predictors of the future risk of chronic diseases such as obesity, cardiometabolic disease, skeletal health and mental health. However, fitness reference values for ethnic children and adolescents have not been published in a Latin-American population. Therefore, the aim of the study was to provide sex- and age-specific physical fitness and anthropometric reference standards among Colombian-Indian schoolchildren...
2016: BMC Public Health
D J Ramos-Campo, J A Rubio-Arias, M Carrasco-Poyatos, P E Alcaraz
The aim of this study was to determine the parameters distinguishing top female futsal players from lower level players. Twenty-seven female futsal players participated in the study, composed of professional first division (elite; n = 15) players and semi-professional second division players (sub-elite; n = 14). Active and passive straight leg raise tests, isokinetic strength of the knee extensor and flexor muscles at 60° · s(-1) angular velocity, squat and counter movement jumps, 30 m sprint, 30 m agility, repeated sprint ability test and maximum ball speed during shooting were measured...
September 2016: Biology of Sport
Athos Trecroci, Zoran Milanović, Alessio Rossi, Marco Broggi, Damiano Formenti, Giampietro Alberti
The purpose of this study was to examine the effects of speed, agility and quickness (SAQ) training on acceleration (5 and 20 m), change of direction speed (CODS) and reactive agility in preadolescent soccer players. Thirty-five participants (age = 10.57 ± 0.26, body mass = 36.78 ± 5.34 kg, body height = 1.42 ± 0.05 m), randomly assigned to experimental (EG, n = 20) and control groups (CG, n = 15), completed a 12-week training intervention, 2 day/week. A significant interaction was found in 5-m sprint (P < 0...
September 3, 2016: Research in Sports Medicine
Matt S Stock, Jacob A Mota, Jennah M Hernandez, Brennan J Thompson
INTRODUCTION: We examined correlations among echo intensity and muscle thickness versus measures of athleticism and isometric strength in healthy children. METHODS: B-mode ultrasonography was used to examine the vastus lateralis (VL) and rectus femoris (RF) in 28 boys (mean age = 12 years). Tests of athleticism included jump height and peak velocity, sprint speed, and agility. Peak torque and the rate of torque development (RTD) at 100 and 200 milliseconds from torque onset were assessed...
September 4, 2016: Muscle & Nerve
J Vanhelst, L Béghin, E Drumez, J-B Baudelet, J Labreuche, D Chapelot, J Mikulovic, Z Ulmer
BACKGROUND: A high level of physical fitness is associated with cardiovascular health in adolescents. The aims of this study were to assess the levels of physical fitness of French adolescents and to determine the prevalence of these adolescents below the minimum level of cardiorespiratory fitness needed to guarantee future favorable cardiovascular profile. METHODS: Participants were 12,082 French children and adolescents (5975 boys, 6107 girls) aged to 9 from 16 years...
September 2016: Revue D'épidémiologie et de Santé Publique
Antonios Vantarakis, Athanasios Chatzinikolaou, Alexandra Avloniti, Nikolaos Vezos, Ioannis I Douroudos, Dimitrios Draganidis, Athanasios Z Jamurtas, Antonis Kambas, Stamatios Kalligeros, Ioannis G Fatouros
Major objectives of army and navy training are the development of readiness, performance, and injury prevention. Numerous studies have examined the effect of specific strength training programs (ST) on performance of Special Forces and military personnel. Although navy personnel have to address on board conditions that require the development of strength, agility, speed and task-specific endurance, there is no information regarding the effects of ST on navy-specific performance. Therefore, the purpose of this study was to investigate the effect of an 8-week ST on performance of navy cadets...
August 18, 2016: Journal of Strength and Conditioning Research
Ronaldo Kobal, Irineu Loturco, Renato Barroso, Saulo Gil, Rogério Cuniyochi, Carlos Ugrinowitsch, Hamilton Roschel, Valmor Tricoli
The combination of strength (ST) and plyometric training (PT) has been shown to be effective for improving sport specific performance. However, there is no consensus about the most effective way to combine these methods in the same training session, in order to produce greater improvements in neuromuscular performance of soccer players. Thus, the purpose of this study was to compare the effects of different combinations of ST and PT sequences on strength, jump, speed, and agility capacities of elite young soccer players...
August 18, 2016: Journal of Strength and Conditioning Research
Lara A Carlson, Michael A Lawrence, Kaylee LeCavalier, Alexander J Koch
The purpose of this study was to examine the impact of anaerobic training on salivary lymphocytes (s-LYMPH), and further determine whether these responses differ between cool vs. thermoneutral environments. Nine lightly clothed (∼0.3 clo) volunteers (7/2 women/men: age 21 ± 1 y; height 168.7 ± 7.3 cm; weight 66.4 ± 8.4 kg; body fat 20.6 ± 7.6%) completed speed, agility, and quickness (SAQ) sessions in both warm (18.9°C, Biddeford, Maine, USA) and cool (10.4°C, Thorsmörk, Iceland) temperatures. SAQ sessions consisted of three trials of 20 m sprints, 40 m sprints, t-tests, and box drills, and two 300-yd shuttle runs in both conditions...
August 16, 2016: Journal of Strength and Conditioning Research
Hao Liu, Sridhar Ravi, Dmitry Kolomenskiy, Hiroto Tanaka
Insect- and bird-size drones-micro air vehicles (MAV) that can perform autonomous flight in natural and man-made environments are now an active and well-integrated research area. MAVs normally operate at a low speed in a Reynolds number regime of 10(4)-10(5) or lower, in which most flying animals of insects, birds and bats fly, and encounter unconventional challenges in generating sufficient aerodynamic forces to stay airborne and in controlling flight autonomy to achieve complex manoeuvres. Flying insects that power and control flight by flapping wings are capable of sophisticated aerodynamic force production and precise, agile manoeuvring, through an integrated system consisting of wings to generate aerodynamic force, muscles to move the wings and a control system to modulate power output from the muscles...
September 26, 2016: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
H Rajabi, N Ghoroubi, M Malaki, A Darvizeh, S N Gorb
Dragonflies and damselflies, belonging to the order Odonata, are known to be excellent fliers with versatile flight capabilities. The ability to fly over a wide range of speeds, high manoeuvrability and great agility are a few characteristics of their flight. The architecture of the wings and their structural elements have been found to play a major role in this regard. However, the precise influence of individual wing components on the flight performance of these insects remains unknown. The design of the wing basis (so called basal complex) and the venation of this part are responsible for particular deformability and specific shape of the wing blade...
2016: PloS One
Ryota Sakamoto, Yasushi Miura
[Purpose] This study investigated the long-term effect of a half-day exercise intervention program on health-related quality of life, life function, and physical function in frail elderly in need of care. The program was conducted at a senior day-care facility specializing in functional training. [Subjects and Methods] Subjects included 41 elderly in need of care who had visited the service facility for at least 1 year. Physical function and life function were evaluated at baseline, 6 months, and 12 months...
July 2016: Journal of Physical Therapy Science
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