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https://www.readbyqxmd.com/read/28636479/decrements-in-knee-extensor-and-flexor-strength-are-associated-with-performance-fatigue-during-simulated-basketball-game-play-in-adolescent-male-players
#1
Aaron T Scanlan, Jordan L Fox, Nattai R Borges, Anne Delextrat, Tania Spiteri, Vincent J Dalbo, Robert Stanton, Crystal O Kean
This study quantified lower-limb strength decrements and assessed the relationships between strength decrements and performance fatigue during simulated basketball. Ten adolescent, male basketball players completed a circuit-based, basketball simulation. Sprint and jump performance were assessed during each circuit, with knee flexion and extension peak concentric torques measured at baseline, half-time, and full-time. Decrement scores were calculated for all measures. Mean knee flexor strength decrement was significantly (P < 0...
June 21, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28605259/is-young-age-a-limiting-factor-when-training-balance-effects-of-child-oriented-balance-training-in-children-and-adolescents
#2
Michael Wälchli, Jan Ruffieux, Audrey Mouthon, Martin Keller, Wolfgang Taube
PURPOSE: Balance training studies in children reported conflicting results without evidence for improvements in children under the age of eight. The aim of this study therefore was to compare balance training adaptations in children of different age groups to clarify whether young age prevents positive training outcomes. METHOD: The effects of five weeks of child-oriented balance training were tested in 77 (38 girls; 39 boys) participants of different age groups (6-7, 11-12, and 14-15 years) and compared to age-matched controls...
June 12, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28602046/exercise-interventions-for-cerebral-palsy
#3
REVIEW
Jennifer M Ryan, Elizabeth E Cassidy, Stephen G Noorduyn, Neil E O'Connell
BACKGROUND: Cerebral palsy (CP) is a neurodevelopmental disorder resulting from an injury to the developing brain. It is the most common form of childhood disability with prevalence rates of between 1.5 and 3.8 per 1000 births reported worldwide. The primary impairments associated with CP include reduced muscle strength and reduced cardiorespiratory fitness, resulting in difficulties performing activities such as dressing, walking and negotiating stairs.Exercise is defined as a planned, structured and repetitive activity that aims to improve fitness, and it is a commonly used intervention for people with CP...
June 11, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28557854/short-term-effects-of-resistance-training-modalities-on-performance-measures-in-male-adolescents
#4
P W Winwood, J J Buckley
This study compared the effects of seven weeks of bodyweight, mobility and resistance training programs on strength, power, and sprint times. Thirty-nine male adolescents (aged 14-15 years) were randomly assigned to one of two groups; bodyweight and mobility training (BMT) (n=25) or combined bodyweight, mobility and free weights training (CBT) (n=14). A physical education class (n=23) of similar age constituted a control group (CON). Both training groups performed two bodyweight and mobility training sessions per week and the CBT group performed two additional free-weight resistance exercise training sessions...
May 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28556690/vitamin-d-status-and-muscle-function-among-adolescent-and-young-swimmers
#5
Nina Rica Wium Geiker, Rikke Larsen, Mette Hansen, Niklas R Jørgensen, Jette Jakobsen, Birthe S Hansen, Michael Kristensen, Susanne Bügel
Impaired muscle function has been coupled to vitamin D insufficiency in young women and in elderly men and women. Those living at Northern latitudes are at risk of vitamin D insufficiency due to low sun exposure which may be more pronounced among elite swimmers because of their indoor training schedules. We aimed to examine vitamin D status among young elite swimmers and evaluate the association between vitamin D status and muscle strength. Twenty-nine swimmers, 12 female and 17 male (16-24 years) residing at latitude 55-56°N were studied in March and April...
May 30, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28489629/modulation-of-isometric-quadriceps-strength-in-soccer-players-with-transcranial-direct-current-stimulation-a-crossover-study
#6
Valentine Z Vargas, Abrahão F Baptista, Guilherme O C Pereira, Alberto C Pochini, Benno Ejnisman, Marcelo B Santos, Silvia M A João, Fuad A Hazime
The aim of this study was to evaluate the effect of transcranial direct current stimulation (tDCS) on the maximum isometric muscle contraction (MVIC) of the knee extensors in soccer players at the pre-professional level. Twenty female soccer players aged 15 to 17 years (mean = 16.1; SD = 0.9) with 5.2 ± 2.6 years of training were randomly divided into two groups to receive either active or sham tDCS in a single session (2 mA; 0.057mA/cm). The MVIC of the knee extensors was evaluated in both lower limbs by manual dynamometry in five sets of contractions divided into four blocks: (0) pre-stimulation, (1) during tDCS, (2) 30 minutes post-tDCS, and (3) 60 minutes post-tDCS...
May 9, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28470587/a-randomized-controlled-trial-of-a-long-term-professional-mentoring-program-for-children-at-risk-outcomes-across-the-first-5-years
#7
J Mark Eddy, Charles R Martinez, Jean Baldwin Grossman, Jennifer J Cearley, Danita Herrera, Alice C Wheeler, Jeff S Rempel, Dana Foney, Jeff M Gau, Bert O Burraston, Tracy W Harachi, Kevin P Haggerty, John R Seeley
Child outcomes due to a paid professional mentoring program, Friends of the Children (FOTC), were investigated across the first 5 years of an ongoing multi-site randomized controlled trial. Participants were 278 children attending kindergarten or first grade who were identified as "at risk" for adjustment problems during adolescence. The program was delivered through established nonprofit community-based organizations. Mentors were hired to work full time and were provided training, supervision, and support to work individually with small numbers of children...
May 3, 2017: Prevention Science: the Official Journal of the Society for Prevention Research
https://www.readbyqxmd.com/read/28462787/inspiratory-muscle-training-for-children-and-adolescents-with-neuromuscular-diseases-a-systematic-review
#8
REVIEW
Anri Human, Lieselotte Corten, Jennifer Jelsma, Brenda Morrow
Patients with neuromuscular diseases are at risk of morbidity and mortality due to respiratory compromise caused by respiratory muscle weakness. A systematic review was performed using pre-specified search strategies to determine the safety of inspiratory muscle training (IMT) and whether it has an impact on inspiratory muscle strength and endurance, exercise capacity, pulmonary function, dyspnoea and health-related quality of life. Randomised, quasi-randomised, cross-over and clinical controlled trials were included if they assessed the use of an external IMT device compared to no, sham/placebo, or alternative IMT treatment in children aged 5-18 years with neuromuscular diseases...
June 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28344461/within-session-sequence-of-balance-and-plyometric-exercises-does-not-affect-training-adaptations-with-youth-soccer-athletes
#9
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/28328718/validity-of-daily-and-weekly-self-reported-training-load-measures-in-adolescent-athletes
#10
Padraic J Phibbs, Gregory Roe, Ben Jones, Dale B Read, Jonathon Weakley, Joshua Darrall-Jones, Kevin Till
Phibbs, PJ, Roe, G, Jones, B, Read, DB, Weakley, J, Darrall-Jones, J, and Till, K. Validity of daily and weekly self-reported training load measures in adolescent athletes. J Strength Cond Res 31(4): 1121-1126, 2017-The primary aim of the study was to assess the level of agreement between the criterion session rating of perceived exertion (sRPE30min) and a practical measure of a self-reported Web-based training load questionnaire 24 hours after training (sRPE24h) in adolescent athletes. The secondary aim was to assess the agreement between weekly summated sRPE24h values (∑sRPE24h) and a weekly Web-based training diary (sRPEweekly) for all field-based training accumulated on a subsequent training week...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28303909/sprint-interval-training-induces-a-sexual-dimorphism-but-does-not-improve-peak-bone-mass-in-young-and-healthy-mice
#11
Kathrin Koenen, Isabell Knepper, Madlen Klodt, Anja Osterberg, Ioannis Stratos, Thomas Mittlmeier, Tina Histing, Michael D Menger, Brigitte Vollmar, Sven Bruhn, Brigitte Müller-Hilke
Elevated peak bone mass in early adulthood reduces the risk for osteoporotic fractures at old age. As sports participation has been correlated with elevated peak bone masses, we aimed to establish a training program that would efficiently stimulate bone accrual in healthy young mice. We combined voluntary treadmill running with sprint interval training modalities that were tailored to the individual performance limits and were of either high or intermediate intensity. Adolescent male and female STR/ort mice underwent 8 weeks of training before the hind legs were analyzed for cortical and trabecular bone parameters and biomechanical strength...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28271803/metabolism-and-exercise-during-youth
#12
Keith Tolfrey, Julia K Zakrzewski-Fruer, James Smallcombe
Three publications were selected based on the strength of the research questions, but also because they represent different research designs that are used with varying degrees of frequency in the pediatric literature. The first, a prospective, longitudinal cohort observation study from 7 to 16 years with girls and boys reports an intrinsic reduction in absolute resting energy expenditure after adjustment for lean mass, fat mass, and biological maturity. The authors suggest this could be related to evolutionary energy conservation, but may be problematic now that food energy availability is so abundant...
February 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28271799/resistance-exercise-and-youth-survival-of-the-strongest
#13
Avery Faigenbaum
Research evidence continues to define the unique health- and performance-related benefits of resistance exercise for children and adolescents. While the effectiveness of resistance exercise in increasing muscle strength and motor skill performance has been demonstrated repeatedly, current scientific evidence indicates that the right "dose" of resistance exercise can enhance physical performance in young athletes and reduce the risk of developing cardiometabolic disease. The papers discussed in this commentary add to our understanding of the potential benefits of youth resistance exercise by defining dose-response relationships for key training variables, exploring sex-specific adaptations to this type of training, and examining the relationship between muscular strength early in life and cardiometabolic risk later in life...
February 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28249346/increased-training-volume-improves-bone-density-and-cortical-area-in-adolescent-football-players
#14
Ian Varley, David C Hughes, Julie P Greeves, William D Fraser, Craig Sale
Habitual football participation has been shown to be osteogenic, although the specific volume of football participation required to cause bone adaptations are not well established. The aim of the present study is to investigate tibial bone adaptations in response to 12 weeks of increased training volume in elite adolescents who are already accustomed to irregular impact training. 99 male adolescent elite footballers participated (age 16±0 y; height 1.76±0.66 m; body mass 70.2±8.3 kg). Tibial scans were performed using peripheral quantitative computed tomography immediately before and 12 weeks after an increase in football training volume...
May 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28235434/bronx-teens-connection-s-clinic-linkage-model-connecting-youth-to-quality-sexual-and-reproductive-health-care
#15
Deborah J O'Uhuru, Vivian Santiago, Lauren E Murray, Madeline Travers, Jane F Bedell
PURPOSE: Teen pregnancy and birth rates in the Bronx have been higher than in New York City, representing a longstanding health disparity. The New York City Department of Health and Mental Hygiene implemented a community-wide, multicomponent intervention to reduce unintended teen pregnancy, the Bronx Teens Connection. The Bronx Teens Connection Clinic Linkage Model sought to increase teens' access to and use of sexual and reproductive health care by increasing community partner capacity to link neighborhood clinics to youth-serving organizations, including schools...
March 2017: Journal of Adolescent Health: Official Publication of the Society for Adolescent Medicine
https://www.readbyqxmd.com/read/28229575/effects-of-a-low-volume-plyometric-training-in-anaerobic-performance-of-adolescent-athletes
#16
Ari R Assunção, Martim Bottaro, Euler A Cardoso, Daiane P Dantas da Silva, Marcelo Ferraz, Carlos A Vieira, Paulo Gentil
BACKGROUND: Parameters related to the anaerobic capacity and power may be important for the performance of many sports whose skills are related to high-intensity and short- duration efforts. Although plyometric training (PT) has been widely used in the regular strength and conditioning programs of young athletes, its effects on anaerobic performance are still controversial. Therefore, the purpose of the present study was to evaluate the effects of PT in anaerobic performance in young athletes...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28173788/real-time-optimized-biofeedback-utilizing-sport-techniques-robust-a-study-protocol-for-a-randomized-controlled-trial
#17
Jeffrey B Taylor, Anh-Dung Nguyen, Mark V Paterno, Bin Huang, Kevin R Ford
BACKGROUND: Anterior cruciate ligament (ACL) injuries in female athletes lead to a variety of short- and long-term physical, financial, and psychosocial ramifications. While dedicated injury prevention training programs have shown promise, ACL injury rates remain high as implementation has not become widespread. Conventional prevention programs use a combination of resistance, plyometric, balance and agility training to improve high-risk biomechanics and reduce the risk of injury. While many of these programs focus on reducing knee abduction load and posture during dynamic activity, targeting hip extensor strength and utilization may be more efficacious, as it is theorized to be an underlying mechanism of injury in adolescent female athletes...
February 7, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28165873/overuse-physeal-injuries-in-youth-athletes
#18
Amanda Arnold, Charles A Thigpen, Paul F Beattie, Michael J Kissenberth, Ellen Shanley
CONTEXT: Despite rising awareness of the risks associated with sports participation, overuse injuries continue to increase in youth athlete populations. Physeal injuries are one type of overuse injury exclusive to pediatric populations that are often sustained during athletic practice or competition. Overuse physeal injuries are, in theory, preventable; however, little consensus has been reached surrounding the risk factors, prevention, and treatment strategies. OBJECTIVE: This systematic review summarizes the best available evidence concerning overuse physeal injuries in youth and adolescent athletes...
March 2017: Sports Health
https://www.readbyqxmd.com/read/28149421/physical-characteristics-of-elite-adolescent-female-basketball-players-and-their-relationship-to-match-performance
#19
Azahara Fort-Vanmeerhaeghe, Alicia Montalvo, Alexander Latinjak, Viswanath Unnithan
There were two aims of this study: first, to investigate physical fitness and match performance differences between under-16 (U16) and under-18 (U18) female basketball players, and second, to evaluate the relationship between physical fitness and game-related performances. Twenty-three young, female, elite Spanish basketball players (16.2 1.2 years) participated in the study. The sample was divided into two groups: U16 and U18 players. The average scores from pre- and post-season physical fitness measurements were used for subsequent analyses...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28146030/strength-and-conditioning-practices-in-adolescent-rugby-players-relationship-with-changes-in-physical-qualities
#20
Jonathon J S Weakley, Kevin Till, Joshua Darrall-Jones, Gregory A B Roe, Padraic J Phibbs, Dale Read, Ben L Jones
Adolescent rugby players benefit from the implementation of resistance training. However resistance training practices and how they influence short-term physical change is unknown. Therefore the purpose of this study was to quantify resistance training practices, evaluate physical development, and relate these changes to resistance training variables across 12-weeks in adolescent rugby union players. Thirty-five male adolescent rugby union players participated in the study with subjects completing an anthropometric and physical testing battery pre- and post- a 12-week in-season mesocycle...
January 30, 2017: Journal of Strength and Conditioning Research
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