keyword
MENU ▼
Read by QxMD icon Read
search

Youth maturation

keyword
https://www.readbyqxmd.com/read/28340491/comparison-of-skillful-vs-less-skilled-young-soccer-players-on-anthropometric-maturation-physical-fitness-and-time-of-practice
#1
Márcio André de Gouvêa, Edilson Serpeloni Cyrino, João Valente-Dos-Santos, Alex Silva Ribeiro, Danilo Rodrigues Pereira da Silva, David Ohara, Manuel J Coelho-E-Silva, Enio Ricardo Vaz Ronque
This study compared maturation, body composition and physical fitness between youth soccer athletes with different technical skills levels. Sixty-two young athletes (11-17 years) were categorized dichotomously in more skilled (n=31) and less skilled (n=31) groups based on 3 specific technical tests (Dribbling Speed Test [DST], Shuttle Dribble Test [SDT] and Slalom Dribble Test [SLDT]). Chronological and skeletal age, time of practice, body composition and 4 physical fitness tests were performed for comparisons...
March 24, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28334178/inter-regional-variations-in-gene-expression-and-age-related-cortical-thinning-in-the-adolescent-brain
#2
Angelita Pui-Yee Wong, Leon French, Gabriel Leonard, Michel Perron, G Bruce Pike, Louis Richer, Suzanne Veillette, Zdenka Pausova, Tomáš Paus
Age-related decreases in cortical thickness observed during adolescence may be related to fluctuations in sex and stress hormones. We examine this possibility by relating inter-regional variations in age-related cortical thinning (data from the Saguenay Youth Study) to inter-regional variations in expression levels of relevant genes (data from the Allen Human Brain Atlas); we focus on genes coding for glucocorticoid receptor (NR3C1), androgen receptor (AR), progesterone receptor (PGR), and estrogen receptors (ESR1 and ESR2)...
February 25, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28314449/aligning-mental-health-treatments-with-the-developmental-stage-and-needs-of-late-adolescents-and-young-adults
#3
REVIEW
Brian Skehan, Maryann Davis
Transitional age youth (TAY) are in a discrete developmental stage, different from both adolescents and mature adults. Serious mental illness can result in their delayed psychosocial development and morbidity. Systemic, provider, and individual barriers result in poor access to care for these youth, potentially impeding their transition to mature adulthood. Current strategies for TAY treatment include patient centered care, vocational and educational support, and shared decision making. There is a paucity of evidence-based practices to effectively treat this population or provide practice guidelines...
April 2017: Child and Adolescent Psychiatric Clinics of North America
https://www.readbyqxmd.com/read/28314379/rejuvenation-by-partial-reprogramming-of-the-epigenome
#4
Andrew R Mendelsohn, James Larrick, Jennifer L Lei
Epigenetic variation with age is one of the most important hallmarks of aging. Resetting or repairing the epigenome of aging cells in intact animals may rejuvenate the cells and perhaps the entire organism. In fact, differentiated adult cells, which by definition have undergone some epigenetic changes, are capable of being rejuvenated and reprogrammed to create pluripotent stem cells and viable cloned animals. Apparently, such reprogramming is capable of completely resetting the epigenome. However, attempts to fully reprogram differentiated cells in adult animals have failed in part because reprogramming leads to formation of teratomas...
March 17, 2017: Rejuvenation Research
https://www.readbyqxmd.com/read/28299968/setting-a-minimum-age-for-juvenile-justice-jurisdiction-in-california
#5
Elizabeth S Barnert, Laura S Abrams, Cheryl Maxson, Lauren Gase, Patricia Soung, Paul Carroll, Eraka Bath
Purpose Despite the existence of minimum age laws for juvenile justice jurisdiction in 18 US states, California has no explicit law that protects children (i.e. youth less than 12 years old) from being processed in the juvenile justice system. In the absence of a minimum age law, California lags behind other states and international practice and standards. The paper aims to discuss these issues. Design/methodology/approach In this policy brief, academics across the University of California campuses examine current evidence, theory, and policy related to the minimum age of juvenile justice jurisdiction...
March 13, 2017: International Journal of Prisoner Health
https://www.readbyqxmd.com/read/28271803/metabolism-and-exercise-during-youth
#6
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/28271802/growth-maturation-and-exercise-during-youth-2016
#7
Jaak Jürimäe
For The Year that Was-2016, I have selected three papers in the area of growth, maturation, and exercise during youth. The year of 2016 was a successful year and it was not an easy task to highlight the most significant publications in this specific area of pediatric exercise science. The first paper has been chosen because it provides, for the first time, the growth and maturational status of elite junior tennis players belonging to the top eight players in the National rankings in various ages and compares against population norms...
February 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28271801/pediatric-aerobic-fitness-and-trainability
#8
Neil Armstrong
Three papers which between them raise controversial issues, apply laboratory measures to sport performance, and expose gaps in knowledge were selected for commentary. The first paper (Sports Med. 2016;46:1451-1460) reviews the literature on peak V̇O2 in relation to body size and recommends that peak V̇O2 in youth is best expressed via allometric scaling of lean body mass. The second paper (Pediatr Exerc Sci. 2016;28:456-465) reports that maturity status has no effect on peak V̇O2, respiratory compensation point, or ventilatory threshold in youth soccer players once data have been allometrically normalized by lower limb muscle volume...
February 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28238294/within-subject-neural-reactivity-to-reward-and-threat-is-inverted-in-young-adolescents
#9
M E Thomason, H A Marusak
BACKGROUND: As children mature, they become increasingly independent and less reliant on caregiver support. Changes in brain systems are likely to stimulate and guide this process. One mechanistic hypothesis suggests that changes in neural systems that process reward and threat support the increase in exploratory behavior observed in the transition to adolescence. This study examines the basic tenets of this hypothesis by performing functional magnetic resonance imaging (fMRI) during well-established reward and threat processing tasks in 40 children and adolescents, aged 9-15 years...
February 27, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28222582/anthropometric-and-performance-measures-to-study-talent-detection-in-youth-volleyball
#10
Giovanni Melchiorri, Valerio Viero, Tamara Triossi, Giuseppe Annino, Elvira Padua, Virginia Tancredi
BACKGROUND: The aim of this work was to study anthropometric and performance measurements in 60 young male volleyball players (YV) and 60 youth not active in the sport (YNA) to assess which of these would be more useful to study the characteristics of potential performers. METHODS: Eight measures to assess anthropometric characteristics, six performance measures and two tests for joint mobility were used. Also relative age and level of maturation were assessed. RESULTS: The anthropometric variables, relative age and level of maturation measured did not show statistically significant differences between groups...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28219108/relative-age-maturation-and-physical-biases-on-position-allocation-in-elite-youth-soccer
#11
Chris Towlson, Stephen Cobley, Adrian Wayne Midgley, Andrew Garrett, Guy Parkin, Ric Lovell
This study assessed the contribution of relative age, anthropometry, maturation, and physical fitness characteristics on soccer playing position (goalkeeper [GK], central-defender [CD], lateral-defender [LD], central-midfield [CM], lateral-midfielder [LM], and forward [FWD]) for 465 elite-youth players (U13-U18's). U13-14 CD were relatively older than LD and CM (likely small effects). CD and GK were generally taller and heavier (likely small to very-likely moderate effects) than other players at each developmental stage and were advanced maturers at U13-14 (very-likely small to likely moderate effects)...
March 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28181772/prediction-of-pubertal-maturation-from-anthropometric-variables-proposal-for-a-non-invasive-method
#12
Radamés M Medeiros, Ricardo F Arrais, Jenner C Azevedo, Ricardo D de Andrade, Vanessa C Pinto, Enio R Ronque, Paulo M Dantas
BACKGROUND: Identifying new perspectives for the development of methods to analyze biological maturation is a very important step for the selection of sports talent. The current study proposed a non-invasive method for evaluating the pubertal status of young males based on anthropometric variables. METHODS: Two hundred six male participants between 8 and 18 years old were evaluated, selected randomly from a school in Natal, Brazil. Seven anthropometric variables were evaluated, as recommended by ISAK, in addition to the pubertal stages being measured through analysis of genital development...
February 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28149420/repeated-dribbling-ability-in-young-soccer-players-reproducibility-and-variation-by-the-competitive-level
#13
João P Duarte, Óscar Tavares, João Valente-Dos-Santos, Vítor Severino, Alexis Ahmed, Ricardo Rebelo-Gonçalves, João R Pereira, Vasco Vaz, Susana Póvoas, André Seabra, Sean P Cumming, Manuel J Coelho-E-Silva
The intermittent nature of match performance in youth soccer supports relevance of ability to repeatedly produce high-intensity actions with short recovery periods. This study was aimed to examine the reproducibility of a repeated dribbling ability protocol and, additionally, to estimate the contribution of concurrent tests to explain inter-individual variability in repeated dribbling output. The total sample comprised 98 players who were assessed as two independent samples: 31 players were assessed twice to examine reliability of the protocol; and 67 juveniles aged 16...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28134572/physical-activity-related-injury-profile-in-children-and-adolescents-according-to-their-age-maturation-and-level-of-sports-participation
#14
Lara Costa E Silva, Maria Isabel Fragoso, Júlia Teles
BACKGROUND: Physical activity (PA) is beneficial, enhancing healthy development. However, one-third of school-age children practicing sports regularly suffer from an injury. These injuries are associated with sex, chronological age, and PA level. PURPOSE: To identify the importance of age, PA level, and maturity as predictors of injury in Portuguese youth. STUDY DESIGN: Descriptive epidemiological study. LEVEL OF EVIDENCE: Level 3...
March 2017: Sports Health
https://www.readbyqxmd.com/read/28129282/age-related-variation-in-male-youth-athletes-countermovement-jump-after-plyometric-training-a-meta-analysis-of-controlled-trials
#15
Jason J Moran, Gavin R H Sandercock, Rodrigo Ramírez-Campillo, César M P Meylan, Jay A Collison, Dave A Parry
Moran, J, Sandercock, GRH, Ramírez-Campillo, R, Meylan, CMP, Collison, J, and Parry, DA. Age-related variation in male youth athletes' countermovement jump after plyometric training: A meta-analysis of controlled trials. J Strength Cond Res 31(2): 552-565, 2017-Recent debate on the trainability of youths has focused on the existence of periods of accelerated adaptation to training. Accordingly, the purpose of this meta-analysis was to identify the age- and maturation-related pattern of adaptive responses to plyometric training in youth athletes...
February 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28118309/maturation-related-differences-in-adaptations-to-resistance-training-in-young-male-swimmers
#16
Jason Moran, Gavin R H Sandercock, Rodrigo Ramírez-Campillo, John-James Wooller, Spiros Logothetis, Patrick P J M Schoenmakers, Dave A Parry
This study examined the effects of resistance training on muscular strength and jump performance in young male swimmers. It was hypothesized that adaptations would be of a lower magnitude in less mature (Pre-peak height velocity [PHV]) than in more mature (Post-PHV) subjects. Fourteen Pre- (-1.8 ± 1.0 years) and 8 Post-PHV (1.6 ± 0.5 years) swimmers undertook a 30 minute, twice-weekly resistance training program for 8 weeks. They were compared with matched control groups (Pre-PHV: -2.0 ± 1.1, n=15; Post-PHV: 1...
January 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28106721/exercise-induced-oxidative-stress-responses-in-the-pediatric-population
#17
REVIEW
Alexandra Avloniti, Athanasios Chatzinikolaou, Chariklia K Deli, Dimitris Vlachopoulos, Luis Gracia-Marco, Diamanda Leontsini, Dimitrios Draganidis, Athanasios Z Jamurtas, George Mastorakos, Ioannis G Fatouros
Adults demonstrate an upregulation of their pro- and anti-oxidant mechanisms in response to acute exercise while systematic exercise training enhances their antioxidant capacity, thereby leading to a reduced generation of free radicals both at rest and in response to exercise stress. However, less information exists regarding oxidative stress responses and the underlying mechanisms in the pediatric population. Evidence suggests that exercise-induced redox perturbations may be valuable in order to monitor exercise-induced inflammatory responses and as such training overload in children and adolescents as well as monitor optimal growth and development...
January 17, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28088438/a-snapshot-of-urban-adolescent-women-s-contraceptive-knowledge-at-the-onset-of-a-community-larc-promotion-initiative
#18
K B Greenberg, S C Jenks, N G Piazza, B R Malibiran, C A Aligne
STUDY OBJECTIVE: To contextualize young women's knowledge and attitudes regarding contraception at the outset of an intervention promoting long-acting reversible contraceptives (LARC) for teen pregnancy prevention. DESIGN: and Setting: Our intervention is based on diffusion of innovation theory, and at the outset we were interested in likely early adopters' existing knowledge and attitudes towards contraception. This mixed methods study consists of focus groups within positive youth development programs in Rochester, New York; we discussed young women's knowledge and sources of information for all FDA-approved contraceptive methods...
January 11, 2017: Journal of Pediatric and Adolescent Gynecology
https://www.readbyqxmd.com/read/28055288/eveningness-as-a-risk-for-behavioral-problems-in-late-adolescence
#19
Ilona Merikanto, Anu-Katriina Pesonen, Liisa Kuula, Jari Lahti, Kati Heinonen, Eero Kajantie, Katri Räikkönen
Circadian preference toward eveningness has been associated with increased risk for mental health problems both in early adolescence and in adulthood. However, in late adolescence, when circadian rhythm naturally shifts to later, its significance for mental health is not clear. Accordingly, we studied how circadian rhythm estimated both by self-reported chronotype and by actigraph-defined midpoint of sleep was associated with self-reported psychiatric problems based on Youth Self Report (YSR). The study builds on a community cohort born in 1998, Helsinki, Finland...
2017: Chronobiology International
https://www.readbyqxmd.com/read/28054492/match-running-performance-and-skill-execution-improves-with-age-but-not-the-number-of-disposals-in-young-australian-footballers
#20
Paul B Gastin, Christie Tangalos, Lorena Torres, Sam Robertson
This study investigated age-related differences in maturity, physical and functional characteristics and playing performance in youth Australian Football (AF). Young male players (n = 156) were recruited from 12 teams across 6 age groups (U10-U15) of a recreational AF club. All players were tested for body size, maturity and fitness. Player performance was assessed during a match in which disposals (kicks and handballs) and their effectiveness were coded from a video recording and match running performance measured using Global Positioning System...
January 5, 2017: Journal of Sports Sciences
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"