keyword
MENU ▼
Read by QxMD icon Read
search

Youth maturation

keyword
https://www.readbyqxmd.com/read/28759890/maturity-status-influences-the-relative-age-effect-in-national-top-level-youth-alpine-ski-racing-and-soccer
#1
Lisa Müller, Christoph Gonaus, Christoph Perner, Erich Müller, Christian Raschner
Since the relative age effect (RAE) characterizes a problem in all age categories of alpine ski racing and soccer and the fact that, yet, to date the underlying factors have not been well investigated, the aim of the present study was to assess the influence of the biological maturity status on the RAE among youth alpine ski racers (YSR) and soccer players (SP). In total, 183 male and female YSR selected for national final races and 423 male SP selected for Elite Youth Development Centres were investigated...
2017: PloS One
https://www.readbyqxmd.com/read/28745464/elite-athletes-and-pubertal-delay
#2
Karina Kapczuk
Intensive physical training and participation in competitive sports during childhood and early adolescence may affect athletes' pubertal development. On the other hand, pubertal timing, early or late, may impact on an athlete selection for a particular sport. Genetic predisposition, training load, nutritional status and psychological stress determine athletes' pubertal timing. Athletes that practice esthetic sports, especially gymnasts, are predisposed to a delay in pubertal development. The growing evidence indicates that energy deficiency, not a systemic training per se, plays a crucial role in the pathogenesis of functional hypothalamic hypogonadism in female athletes...
October 2017: Minerva Pediatrica
https://www.readbyqxmd.com/read/28715777/regular-cannabis-and-alcohol-use-is-associated-with-resting-state-time-course-power-spectra-in-incarcerated-adolescents
#3
Sandra Thijssen, Barnaly Rashid, Shruti Gopal, Prashanth Nyalakanti, Vince D Calhoun, Kent A Kiehl
Cannabis and alcohol are believed to have widespread effects on the brain. Although adolescents are at increased risk for substance use, the adolescent brain may also be particularly vulnerable to the effects of drug exposure due to its rapid maturation. Here, we examined the association between cannabis and alcohol use duration and resting-state functional connectivity in a large sample of male juvenile delinquents. The present sample was drawn from the Southwest Advanced Neuroimaging Cohort, Youth sample, and from a youth detention facility in Wisconsin...
July 8, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28713470/differences-in-anthropometry-biological-age-and-physical-fitness-between-young-elite-kayakers-and-canoeists
#4
Daniel López-Plaza, Fernando Alacid, José María Muyor, Pedro Ángel López-Miñarro
The aim of this study was to determine the anthropometric and physical characteristics of youth elite paddlers and to identify the differences between kayakers and canoeists. A total of 171 male paddlers (eighty-nine kayakers and eighty-two canoeists), aged 13.69 ± 0.57 years (mean ± SD) volunteered to participate in this study. The participants completed basic anthropometric assessments (body mass, stretch stature, sitting height, body mass index, maturity level, sum of 6 skinfolds and fat mass percentage) as well as a battery of physical fitness tests (overhead medicine ball throw, counter movement jump, sit-and-reach and 20 m multi-stage shuttle run tests)...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28713313/the-burden-of-binge-and-heavy-drinking-on-the-brain-effects-on-adolescent-and-young-adult-neural-structure-and-function
#5
REVIEW
Anita Cservenka, Ty Brumback
Introduction: Adolescence and young adulthood are periods of continued biological and psychosocial maturation. Thus, there may be deleterious effects of consuming large quantities of alcohol on neural development and associated cognition during this time. The purpose of this mini review is to highlight neuroimaging research that has specifically examined the effects of binge and heavy drinking on adolescent and young adult brain structure and function. Methods: We review cross-sectional and longitudinal studies of young binge and heavy drinkers that have examined brain structure (e...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28713281/effectiveness-of-traditional-strength-vs-power-training-on-muscle-strength-power-and-speed-with-youth-a-systematic-review-and-meta-analysis
#6
REVIEW
David G Behm, James D Young, Joseph H D Whitten, Jonathan C Reid, Patrick J Quigley, Jonathan Low, Yimeng Li, Camila D Lima, Daniel D Hodgson, Anis Chaouachi, Olaf Prieske, Urs Granacher
Numerous national associations and multiple reviews have documented the safety and efficacy of strength training for children and adolescents. The literature highlights the significant training-induced increases in strength associated with youth strength training. However, the effectiveness of youth strength training programs to improve power measures is not as clear. This discrepancy may be related to training and testing specificity. Most prior youth strength training programs emphasized lower intensity resistance with relatively slow movements...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28699265/effects-of-harsh-parenting-and-positive-parenting-practices-on-youth-aggressive-behavior-the-moderating-role-of-early-pubertal-timing
#7
Frances R Chen, Adrian Raine
Prior research indicates that early pubertal timing is associated with aggressive behavior, particularly in the context of adversity as postulated in the contextual amplification hypothesis. However, few studies have examined harsh parenting as the context for the effect of early pubertal timing. Even fewer studies have tested the interactive effect of early pubertal timing and positive parenting on aggressive behavior. In this study, we tested the proposition that early pubertal timing, contrary to the general conception of it as a vulnerability, indexed susceptibility, and thus early maturing individuals were affected more by their environment in a "for better and for worse" manner...
July 12, 2017: Aggressive Behavior
https://www.readbyqxmd.com/read/28690685/examining-for-an-association-between-candidate-gene-polymorphisms-in-the-metabolic-syndrome-components-on-excess-weight-and-adiposity-measures-in-youth-a-cross-sectional-study
#8
Angélica María Muñoz, Claudia María Velásquez, Gloria María Agudelo, Rosa Magdalena Uscátegui, Alejandro Estrada, Fredy Alonso Patiño, Beatriz Elena Parra, María Victoria Parra, Gabriel Bedoya
BACKGROUND: A polymorphism in a gene may exert its effects on multiple phenotypes. The aim of this study is to explore the association of 10 metabolic syndrome candidate genes with excess weight and adiposity and evaluate the effect of perinatal and socioeconomic factors on these associations. METHODS: The anthropometry, socioeconomic and perinatal conditions and 10 polymorphisms were evaluated in 1081 young people between 10 and 18 years old. Genotypic associations were calculated using logistic and linear models adjusted by age, gender, and pubertal maturation, and a genetic risk score (GRS) was calculated by summing the number of effect alleles...
2017: Genes & Nutrition
https://www.readbyqxmd.com/read/28690042/the-impact-of-subchondral-bone-cysts-on-local-bone-stresses-in-the-medial-femoral-condyle-of-the-equine-stifle-joint
#9
Lance L Frazer, Elizabeth M Santschi, Kenneth J Fischer
Subchondral lucency (SCL), also referred to as subchondral bone cysts, can cause clinical problems in horses and humans. In humans, SCLs occur in youths and adolescents [1] due to mechanical factors (often related to athletics) and in skeletally mature individuals secondary to osteoarthritis (OA). In horses, SCL most commonly occurs in the medial femoral condyle (MFC) of growing horses (without OA), and causes lameness. The cause of equine SCL is debated, but bone trauma due to overload is the likely mechanism...
July 6, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28683812/mechano-growth-factor-a-splice-variant-of-igf-1-promotes-neurogenesis-in-the-aging-mouse-brain
#10
Jason J Tang, Jewel L Podratz, Miranda Lange, Heidi J Scrable, Mi-Hyeon Jang, Anthony J Windebank
Mechano growth factor (MGF) is a splice variant of IGF-1 first described in skeletal muscle. MGF induces muscle cell proliferation in response to muscle stress and injury. In control mice we found endogenous expression of MGF in neurogenic areas of the brain and these levels declined with age. To better understand the role of MGF in the brain, we used transgenic mice that constitutively overexpressed MGF from birth. MGF overexpression significantly increased the number of BrdU+ proliferative cells in the dentate gyrus (DG) of the hippocampus and subventricular zone (SVG)...
July 7, 2017: Molecular Brain
https://www.readbyqxmd.com/read/28662190/bone-tissue-blood-lipids-and-inflammatory-profiles-in-adolescent-male-athletes-from-sports-contrasting-in-mechanical-load
#11
Ricardo R Agostinete, João P Duarte, João Valente-Dos-Santos, Manuel J Coelho-E-Silva, Oscar M Tavares, Jorge M Conde, Carlos A Fontes-Ribeiro, Giancarlo Condello, Laura Capranica, Suziane U Caires, Rômulo A Fernandes
Exploring the effect of non-impact and impact sports is particular relevant to understand the interaction between skeletal muscle and bone health during growth. The current study aimed to compare total and regional bone and soft-tissue composition, in parallel to measurements of blood lipid and inflammatory profiles between adolescent athletes and non-athletes. Anthropometry, biological maturity, dual energy X-ray absorptiometry (DXA) scans, training load and lipid and inflammatory profiles were assessed in a cross-sectional sample of 53 male adolescents (20 non-athletes, 15 swimmers and 18 basketball players) aged 12-19 years...
2017: PloS One
https://www.readbyqxmd.com/read/28660776/gender-affirming-pharmacological-interventions-for-youth-with-gender-dysphoria-when-treatment-guidelines-are-not-enough
#12
Leena Nahata, Gayathri Chelvakumar, Scott Leibowitz
Youth with gender dysphoria, also known as transgender youth, are increasingly presenting to multidisciplinary clinics within academic pediatric centers across the United States. Gender-affirming pharmacological interventions for adolescents with gender dysphoria may be used to promote positive psychological well-being and mental health outcomes. Interventions range from completely reversible to partially irreversible, based on the age and sexual maturity of the adolescent. For each intervention, dilemmas and controversies exist regarding age at treatment initiation, treatment duration, safety, and cost...
June 1, 2017: Annals of Pharmacotherapy
https://www.readbyqxmd.com/read/28653779/adrenal-maturation-nutritional-status-and-mucosal-immunity-in-bolivian-youth
#13
Carolyn R Hodges-Simeon, Sean P Prall, Aaron D Blackwell, Michael Gurven, Steven J C Gaulin
OBJECTIVES: Humans-and several other apes-exhibit a unique pattern of post-natal adrenal maturation; however, the causes and consequences of variation in adrenal development are not well understood. In this study, we examine developmental and age-related maturation of the adrenal gland (measured via dehydroepiandrosterone-sulfate [DHEA-S]) for potential life-history associations with growth and mucosal immunity in a rural population of immune-challenged Bolivian juveniles and adolescents...
June 27, 2017: American Journal of Human Biology: the Official Journal of the Human Biology Council
https://www.readbyqxmd.com/read/28639838/provider-perceptions-of-stigma-and-discrimination-experienced-by-adolescents-and-young-adults-with-phiv-while-accessing-sexual-and-reproductive-health-care
#14
Cynthia D Fair, Meredith Berk
Historically, children with perinatally-acquired HIV (PHIV) were viewed as the "innocent victims" as their HIV infection was not acquired through sexual/drug related means. Today, adolescents with PHIV are surviving into young adulthood and are engaging in developmentally expected behaviors such as establishing intimate, sexual relationships. Like other youth, those living with PHIV often need to access sexual and reproductive health (SRH) services. Previous research has documented stigma and discrimination experienced by adult women living with HIV as they try to access SRH care...
June 22, 2017: AIDS Care
https://www.readbyqxmd.com/read/28628369/premier-league-academy-soccer-players-experiences-of-competing-in-a-tournament-bio-banded-for-biological-maturation
#15
Sean P Cumming, Daniel J Brown, Siobhan Mitchell, James Bunce, Dan Hunt, Chris Hedges, Gregory Crane, Aleks Gross, Sam Scott, Ed Franklin, Dave Breakspear, Luke Dennison, Paul White, Andrew Cain, Joey C Eisenmann, Robert M Malina
Individual differences in the growth and maturation have been shown to impact player performance and development in youth soccer. This study investigated Premier League academy players' experiences of participating in a tournament bio-banded for biological maturation. Players (N = 66) from four professional soccer clubs aged 11 and 14 years and between 85-90% of adult stature participated in a tournament. Players competed in three 11 vs 11 games on a full size pitch with 25-min halves. Sixteen players participated in four 15-min focus groups and were asked to describe their experiences of participating in the bio-banded tournament in comparison to age group competition...
June 19, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28608181/modified-maturity-offset-prediction-equations-validation-in-independent-longitudinal-samples-of-boys-and-girls
#16
Sławomir M Kozieł, Robert M Malina
BACKGROUND: Predicted maturity offset and age at peak height velocity are increasingly used with youth athletes, although validation studies of the equations indicated major limitations. The equations have since been modified and simplified. OBJECTIVE: The objective of this study was to validate the new maturity offset prediction equations in independent longitudinal samples of boys and girls. METHODS: Two new equations for boys with chronological age and sitting height and chronological age and stature as predictors, and one equation for girls with chronological age and stature as predictors were evaluated in serial data from the Wrocław Growth Study, 193 boys (aged 8-18 years) and 198 girls (aged 8-16 years)...
June 12, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28605273/improving-the-prediction-of-maturity-from-anthropometric-variables-using-a-maturity-ratio
#17
Job Fransen, Stephen Bush, Stephen Woodcock, Andrew Novak, Dieter Deprez, Adam D G Baxter-Jones, Roel Vaeyens, Matthieu Lenoir
PURPOSE: This study aimed to improve the prediction accuracy of Age at Peak Height Velocity (APHV) from anthropometric assessment using non-linear models and a maturity ratio rather than a maturity offset. METHODS: The dataset used to develop the original prediction equations was used to test a new prediction model, utilising the maturity ratio and a polynomial prediction equation. This model was then applied to a sample of male youth academy soccer players (n = 1330) to validate the new model in youth athletes...
June 12, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28604286/growth-functional-capacities-and-motivation-for-achievement-and-competitiveness-in-youth-basketball-an-interdisciplinary-approach
#18
Humberto Moreira Carvalho, Carlos E Gonçalves, Dave Collins, Roberto R Paes
The interaction of multiple influences on the path to sport success is not yet fully understood by sport scientists. In this study, we examined variation in body size, functional capacities and motivation for achievement, competitiveness and deliberate practice of youth basketball players associated with differences in biological maturity status, chronological age and years of training experience. Reflecting the importance of interactive effects, we examined the relationships between the psychological variables and functional capacities...
June 12, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28597618/effects-of-resistance-training-overtraining-and-early-specialization-on-youth-athletes
#19
Benjamin K Walters, Connor R Read, A Reed Estes
INTRODUCTION: In 2014, 60 million youth ages 6-18 participated in some form of generalized athletics. 3.5 million children are injured annually participating in organized sport or recreational activities. While sound physical education can decrease the burden of youth sports injuries, the median annual physical education budget of $764 for United States elementary, middle and high schools may not allow enough flexibility to apply evidenced-based guidelines. EVIDENCE ACQUISITION: The topics were selected after a careful review of the 2016 National Strength and Conditioning Association Position Statement on Long-Term Athletic Development...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28579327/manipulating-cognitive-reserve-pre-injury-environmental-conditions-influence-the-severity-of-concussion-symptomology-gene-expression-and-response-to-melatonin-treatment-in-rats
#20
Glenn R Yamakawa, Sabrina Salberg, Karen M Barlow, Brian L Brooks, Michael J Esser, Keith Owen Yeates, Richelle Mychasiuk
In an effort to understand the factors that contribute to heterogeneity in outcomes often associated with mTBI in youth, this study examined the role of premorbid differences in cognitive reserve on post-concussive symptoms (PCS), molecular markers, and treatment response. Male and female rats matured in one of three environmental conditions (Stress, Enrichment, Control), received a mTBI in adolescence, and were randomized to melatonin or placebo treatment. All animals underwent a behavioural test battery designed to examine PCS...
September 2017: Experimental Neurology
keyword
keyword
81427
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"