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https://www.readbyqxmd.com/read/28330961/reference-values-for-developing-responsive-functional-outcome-measures-across-the-lifespan
#1
Marnee J McKay, Jennifer N Baldwin, Paulo Ferreira, Milena Simic, Natalie Vanicek, Joshua Burns
OBJECTIVE: To generate a reference dataset of commonly performed functional outcome measures in 1,000 children and adults and investigate the influence of demographic, anthropometric, strength, and flexibility characteristics. METHODS: Twelve functional outcome measures were collected from 1,000 healthy individuals aged 3-101 years: 6-minute walk test, 30-second chair stand test, timed stairs test, long jump, vertical jump, choice stepping reaction time, balance (Star Excursion Balance Test, tandem stance eyes open and closed, single-leg stance eyes closed), and dexterity (9-hole peg test, Functional Dexterity Test)...
March 22, 2017: Neurology
https://www.readbyqxmd.com/read/28328716/vertical-jump-and-leg-power-normative-data-for-colombian-schoolchildren-aged-9-17-9-years-the-fuprecol-study
#2
Robinson Ramírez-Vélez, Jorge E Correa-Bautista, Felipe Lobelo, Eduardo L Cadore, Alicia M Alonso-Martinez, Mikel Izquierdo
Ramírez-Vélez, R, Correa-Bautista, JE, Lobelo, F, Cadore, EL, Alonso-Martinez, AM, and Izquierdo, M. Vertical jump and leg power normative data for Colombian schoolchildren aged 9-17.9 years: the FUPRECOL study. J Strength Cond Res 31(4): 990-998, 2017-The aims of the present study were to generate normative vertical jump height and predicted peak power (Ppeak) data for 9- to 17.9-year-olds and to investigate between-sex and age group differences in these measures. This was a cross-sectional study of 7,614 healthy schoolchildren (boys n = 3,258 and girls n = 4,356, mean [SD] age 12...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28316257/acute-kinematic-and-kinetic-adaptations-to-wearable-resistance-during-vertical-jumping
#3
Paul Macadam, Kim D Simperingham, John B Cronin, Grace Couture, Chloe Evison
One variation of vertical jump (VJ) training is resisted or weighted jump training, where wearable resistance (WR) enables jumping to be overloaded in a movement specific manner. A two-way analysis of variance with Bonferroni post hoc contrasts was used to determine the acute changes in VJ performance with differing load magnitudes and load placements. Kinematic and kinetic data were quantified using a force plate and contact mat. Twenty sport active subjects (age: 27.8 ± 3.8 years; body mass (BM): 70...
March 19, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28290718/assessments-of-mechanical-stiffness-and-relationships-to-performance-determinants-in-middle-distance-runners
#4
Simon A Rogers, Chris S Whatman, Simon N Pearson, Andrew E Kilding
PURPOSE: This study aimed to examine relationships between methods of lower-limb stiffness and their associations with running economy (RE) and maximal velocity (vmax) in middle-distance (MD) runners. METHODS: Eleven highly-trained male MD runners performed a series of mechanical and physiological tests to determine maximal overground sprint speed, RE and V̇O2peak. Achilles tendon stiffness (kT) was estimated using ultrasonography during maximal isometric ankle plantarflexion...
March 14, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28282758/the-effects-of-barbell-load-on-countermovement-vertical-jump-power-and-net-impulse
#5
Peter D Mundy, Neal A Smith, Mike A Lauder, Jason P Lake
The aim of this study was to examine the effects of barbell load on countermovement vertical jump (CMJ) power and net impulse within a theoretically valid framework, cognisant of the underpinning force, temporal, and spatial components. A total of 24 resistance-trained rugby union athletes (average ± SD: age: 23.1 ± 3.4 years; height: 1.83 ± 0.05 m; body mass (BM): 91.3 ± 10.5 kg) performed maximal CMJ under 5 experimental conditions in a randomised, counterbalanced order: unloaded, and with additional loads of 25%, 50%, 75%, and 100% of BM...
September 26, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28282755/the-acute-effects-of-an-intense-stretch-shortening-cycle-fatigue-protocol-on-the-neuromechanical-parameters-of-lower-limbs-in-men-and-prepubescent-boys
#6
Savvas Lazaridis, Dimitrios A Patikas, Eleni Bassa, Themistoklis Tsatalas, Konstantinos Hatzikotoulas, Christos Ftikas, Christos Kotzamanidis
The study examined the differences between boys and adults after an intense stretch-shortening cycle fatigue protocol on neuromechanical parameters of the lower limb. Thirteen boys (9-11 years old) and 13 adult men (22-28 years old) were tested for maximal isometric voluntary knee extension torque and drop jump (DJ) performance from 30 cm before and immediately after a fatigue protocol, consisted of 10 × 10 maximum effort vertical jumps. Three-dimensional kinematics, kinetics and electromyographic (EMG) parameters of the lower extremities muscles were recorded during DJs before and after the fatigue test...
February 8, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28275005/kinematic-control-of-extreme-jump-angles-in-the-red-leg-running-frog-kassina-maculata
#7
Christopher Thomas Richards, Laura Beatriz Porro, Amber Jade Collings
The kinematic flexibility of frog hindlimbs enables multiple locomotor modes within a single species. Prior work has extensively explored maximum performance capacity in frogs; however, the mechanisms by which anurans modulate performance within locomotor modes remain unclear. We explored how Kassina maculata, a species known for both running and jumping abilities, modulates takeoff angle from horizontal to nearly vertical. Specifically, how do 3D motions of leg segments coordinate to move the center of mass (COM) upwards and forwards? How do joint rotations modulate jump angle? High-speed video was used to quantify 3D joint angles and their respective rotation axis vectors...
March 8, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28269975/effects-of-detraining-on-neuromuscular-performance-in-a-selected-group-of-elite-women-pole-vaulters-a-case-study
#8
Irineu Loturco, Lucas A Pereira, Ronaldo Kobal, Henrique C Martins, Katia Kitamura, Cesar C Abad, Fabio Y Nakamura
The aim of this paper was to determine the effects of 28 days of inactivity on neuromuscular performance of elite women pole-vaulters. Four athletes undertook measurements of rate of force development (RFD), unloaded and loaded vertical jump tests, drop jumps and a 45 m sprint test before and after a transition period of planned inactivity. The RFD, the ability to accelerate over very short distances (5 m) and sprinting capacity improved after training cessation. Acceleration over longer distances (5-45 m) was impaired, while unloaded and loaded vertical jump tests suffered trivial to small changes...
April 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28268950/a-case-study-for-integrated-stem-outreach-in-an-urban-setting-using-a-do-it-yourself-vertical-jump-measurement-platform
#9
John F Drazan, Heather Danielsen, Matthew Vercelletto, Amy Loya, James Davis, Ron Eglash
The purpose of this study was to develop and deploy a low cost vertical jump platform using readily available materials for Science, Technology, Engineering, and Mathematics (STEM) education and outreach in the inner city. The platform was used to measure the jumping ability of participants to introduce students to the collection and analysis of scientific data in an engaging, accessible manner. This system was designed and fabricated by a student team of engineers as part of a socially informed engineering and design class...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28255567/an-ecological-study-of-anterior-cruciate-ligament-reconstruction-part-2-functional-performance-tests-correlate-with-return-to-sport-outcomes
#10
Timothy M McGrath, Gordon Waddington, Jennie M Scarvell, Nick Ball, Rob Creer, Kevin Woods, Damian Smith, Roger Adams
BACKGROUND: Additional high-quality prospective studies are needed to better define the objective criteria used in relation to return-to-sport decisions after anterior cruciate ligament (ACL) reconstruction in active populations. PURPOSE: To investigate prospectively the relationship between functional performance test results at 24 weeks postoperative and return-to-sport activity (Tegner activity score) at 12 and 24 months, respectively, after synthetic (ligament advanced reinforcement system [LARS]) and autograft (doubled semitendinosus/gracilis [2ST/2GR]) ACL reconstructions...
February 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28254581/the-effects-of-tissue-flossing-on-ankle-range-of-motion-and-jump-performance
#11
Matthew W Driller, Ryan G Overmayer
OBJECTIVES: Tissue compression and partial vascular occlusion using band flossing results in re-perfusion of blood to the muscle tissue that may ultimately increase range of motion (ROM) and reduce risk of injury. However, the effect of band flossing on ankle ROM and jump performance is yet to be evaluated. DESIGN: In a crossover design, participants performed a number of tests pre and post the application of a floss band to one ankle (FLOSS), with the contralateral ankle acting as the control (CON)...
December 12, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28247210/age-related-effects-on-maximal-and-rapid-hamstrings-quadriceps-strength-capacities-and-vertical-jump-power-in-young-and-older-females
#12
Ty B Palmer, Brittany N Followay, Brennan J Thompson
BACKGROUND AND AIMS: Declines in hamstrings and quadriceps maximal and rapid strength are commonly reported as a consequence of aging; however, few studies have investigated the influence of age on maximal and rapid hamstrings to quadriceps (H/Q) strength ratios. This study aimed to examine the effects of age on leg extension and flexion maximal and rapid torque production, H/Q strength ratios, and muscle power in healthy, young and old females. METHODS: Fifteen young (21 ± 2 years) and 15 old (69 ± 7 years) females performed 3 isometric leg extension and flexion maximal voluntary contractions (MVCs), from which peak torque (PT), early (0-30 ms) and late (0-200 ms) phase rate of torque development (RTD), and PT and RTD H/Q strength ratios were extracted...
February 28, 2017: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/28240710/intermittent-but-not-continuous-static-stretching-improves-subsequent-vertical-jump-performance-in-flexibility-trained-athletes
#13
Gregory C Bogdanis, Olyvia Donti, Charilaos Tsolakis, Ilias Smilios, David J Bishop
This study examined changes in countermovement jump (CMJ) height after an intermittent or a continuous static stretching protocol of equal total duration. DESIGN: Sixteen male, elite-level gymnasts performed 90 s of intermittent (3 x 30 s with 30 s rest) or continuous stretching (90 s) of the quadriceps muscle. A single-leg stretching and jumping design was used, with the contra-lateral limb serving as a control. The same individuals performed both conditions with alternate legs in a randomized, counterbalanced order...
February 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28240708/movement-patterns-and-muscle-damage-during-simulated-rugby-sevens-matches-in-national-team-players
#14
Lucas A Pereira, Fábio Y Nakamura, José E Moraes, Katia Kitamura, Solange P Ramos, Irineu Loturco
The aim of this study was to analyze the match performance (i.e., distance covered in different intensities), signs of muscle damage (assessed by means of creatine kinase [CK] activity and rate of force development [RFD]), and neuromuscular fatigue (using linear sprint and vertical jump performances) following three single-day simulated matches performed by rugby sevens players from the Brazilian National Team. Ten male rugby sevens players (25.2 ± 3.6 years; 88.7 ± 7.1 kg; 182.2 ± 6.3 cm) participated in this study...
February 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28240706/manifestations-of-proprioception-during-vertical-jumps-to-specific-heights
#15
Struzik Artur, Pietraszewski Bogdan, Kawczyñski Adam, Winiarski Sławomir, Juras Grzegorz, Rokita Andrzej
Jumping and proprioception are important abilities in many sports. The efficiency of the proprioceptive system is indirectly related to jumps performed at specified heights. Therefore, this study recorded the ability of young athletes who play team sports to jump to a specific height compared to their maximum ability. A total of 154 male (age: 14.8±0.9 years, body height: 181.8±8.9 cm, body weight: 69.8±11.8 kg, training experience: 3.8±1.7 years) and 151 female (age: 14.1±0.8 years, body height: 170.5±6...
February 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28231260/effects-of-the-skills4genius-sports-based-training-program-in-creative-behavior
#16
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/28229570/the-periodization-of-resistance-training-in-soccer-players-changes-in-maximal-strength-lower-extremity-power-body-composition-and-muscle-volume
#17
Amir Barjaste, Bahman Mirzaei
BACKGROUND: The purpose of this study was to investigate the effect of 12-weeks traditional periodized resistance training on some physical capacities of soccer players. METHODS: Eighteen amateur soccer players with very little experience in resistance training voluntarily participated in this study. Subjects were assigned into two groups; Experimental (EX) group (n: 10) that conducted a traditional linear periodized resistance training program and a control (C) group (n: 8) that did not participate in any resistance training...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28227156/a-case-study-for-integrated-stem-outreach-in-an-urban-setting-using-a-do-it-yourself-vertical-jump-measurement-platform
#18
John F Drazan, Heather Danielsen, Matthew Vercelletto, Amy Loya, James Davis, Ron Eglash, John F Drazan, Heather Danielsen, Matthew Vercelletto, Amy Loya, James Davis, Ron Eglash, Heather Danielsen, Ron Eglash, John F Drazan, Matthew Vercelletto, Amy Loya, James Davis
The purpose of this study was to develop and deploy a low cost vertical jump platform using readily available materials for Science, Technology, Engineering, and Mathematics (STEM) education and outreach in the inner city. The platform was used to measure the jumping ability of participants to introduce students to the collection and analysis of scientific data in an engaging, accessible manner. This system was designed and fabricated by a student team of engineers as part of a socially informed engineering and design class...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225525/effects-of-game-performance-on-softball-pitchers-and-catchers
#19
Gretchen D Oliver, Hillary A Plummer, Jessie Washington, Wendi H Weimar, Allison Brambeck
The purpose of this study was to examine the effects of game exposure on pitchers and catchers' hip and glenohumeral range of motion (ROM), isometric strength, and vertical jump performance and power. Five college female softball pitchers (174.24 ± 7.53 cm; 82.10 ± 11.27 kg; 20 ± 1.82 years) and four catchers (165.10 ± 9.04 kg; 68.61 ± 3.87 cm; 20 ± 1.41 years) participated. Hip and glenohumeral rotational ROM; hip and glenohumeral rotational isometric strength; hip abduction and adduction strength; and vertical jump height were assessed pre and post-game exposure...
February 21, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28222577/acute-ingestion-of-neuromuscular-enhancement-supplements-do-not-improve-power-output-work-capacity-and-cognition
#20
Jennifer A Bunn, Andrew Crossley, Morgan D Timiney
BACKGROUND: Improving motor unit recruitment and function is trainable and positively affects performance. Evidence suggests that supplementation of choline, uridine, and docosahexaenoic acid (DHA) may also enhance neuromuscular function. The purpose of this study was to assess the influence of acute ingestion of these supplements on anaerobic exercise performance and cognition. METHODS: Twenty college-aged trained males (21.2 ± 1.4 years, 181.2 ± 6.1 cm, 94.4 ± 20...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
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