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"Peak height velocity"

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https://www.readbyqxmd.com/read/27836627/what-is-the-most-accurate-and-reliable-methodological-approach-for-predicting-peak-height-velocity-in-adolescents-a-systematic-review
#1
REVIEW
Kathryn Mills, Donovan Baker, Verity Pacey, Martin Wollin, Michael K Drew
OBJECTIVES: To identify the most accurate method of predicting peak height velocity in adolescents. DESIGN: Systematic review. METHODS: A comprehensive literature search of six electronic databases and reference lists was conducted. Studies that met selection criteria of (1) observational longitudinal cohort study (2) reproducible method/s of predicting peak height velocity (3) minimum six-month follow-up (4) healthy male and/or female adolescent subjects, with the exception of participants with adolescent idiopathic scoliosis, were considered for review...
October 29, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27832016/curve-progression-risk-in-a-mixed-series-of-braced-and-nonbraced-patients-with-idiopathic-scoliosis-related-to-skeletal-maturity-assessment-on-the-olecranon
#2
Yann Philippe Charles, Federico Canavese, Alain Diméglio
We aimed to determine the curve progression risk of idiopathic scoliosis in patients at the time of peak height velocity by plotting curve magnitudes against olecranon stages of skeletal maturation. Register data of 372 patients with juvenile or adolescent idiopathic scoliosis followed at 6-month intervals from onset of scoliosis to skeletal maturity were reviewed. At the onset of the pubertal growth spurt, curves greater than 30° have a 100% risk of progressing over 45° (P<0.0001). Curves 21-30° have a progression risk of 72...
November 9, 2016: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/27827803/is-calcaneal-broadband-ultrasound-attenuation-a-valid-index-of-dual-energy-x-ray-absorptiometry-derived-bone-mass-in-children
#3
B K Weeks, R Hirsch, R C Nogueira, B R Beck
OBJECTIVES: The aim of the current study was to assess whether calcaneal broadband ultrasound attenuation (BUA) can predict whole body and regional dual-energy x-ray absorptiometry (DXA)-derived bone mass in healthy, Australian children and adolescents at different stages of maturity. METHODS: A total of 389 boys and girls across a wide age range (four to 18 years) volunteered to participate. The estimated age of peak height velocity (APHV) was used to classify children into pre-, peri-, and post-APHV groups...
November 2016: Bone & Joint Research
https://www.readbyqxmd.com/read/27793062/variation-in-responses-to-sprint-training-in-male-youth-athletes-a-meta-analysis
#4
J Moran, G Sandercock, M C Rumpf, D A Parry
The trainability of youths and the existence of periods of accelerated adaptation to training have become key subjects of debate in exercise science. The purpose of this meta-analysis was to characterise youth athletes' adaptability to sprint training across PRE-, MID-, and POST-peak height velocity (PHV) groups. Effect sizes were calculated as a measure of straight-line sprinting performance with studies qualifying based on the following criteria: (a) healthy male athletes who were engaged in organised sports; (b) groups of participants with a mean age between 10 and 18 years; (c) sprint training intervention duration between 4 and 16 weeks...
October 28, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27743496/being-born-large-for-gestational-age-is-associated-with-earlier-pubertal-take-off-and-longer-growth-duration-a-longitudinal-study
#5
Ilaria Di Giovanni, M Loredana Marcovecchio, Valentina Chiavaroli, Tommaso de Giorgis, Francesco Chiarelli, Angelika Mohn
AIM: Perinatal factors seem to influence the onset of puberty, but there is limited information on the potential effect of large size at birth on pubertal growth. This study evaluated pubertal growth in children born large for gestational age (LGA) compared to children born appropriate for gestational age (AGA). METHODS: Longitudinal growth data collected from 70 children - 40 AGA and 30 LGA - were analysed. The ages at take-off, peak height velocity, final height and pubertal growth spurts were calculated using the Preece-Baines model I...
October 15, 2016: Acta Paediatrica
https://www.readbyqxmd.com/read/27650913/long-bone-robustness-during-growth-a-cross-sectional-pqct-examination-of-children-and-young-adults-aged-5-29years
#6
Timo Rantalainen, Benjamin K Weeks, Rossana C Nogueira, Belinda R Beck
Skeletal robustness (cross-section size relative to length) is associated with stress fractures in adults, and appears to explain the high incidence of distal radius fractures in adolescents. However, little is known about the ontogeny of long bone robustness during the first three decades of life. Therefore, we explored the ontogeny of tibial, fibular, ulnar and radial robustness in a cross-sectional sample of 5 to 29year-old volunteers of both sexes. Peripheral quantitative computed tomography (pQCT) was used to evaluate cross-sections of the leg (4%, 14%, 38% and 66%), and forearm (4%, and 66%) in N=432 individuals...
September 17, 2016: Bone
https://www.readbyqxmd.com/read/27618715/understanding-the-mismatch-between-coaches-and-players-perceptions-of-exertion
#7
Michel S Brink, Anna W Kersten, Wouter G P Frencken
: A mismatch between the intended training exertion by the coach and the perceived exertion by players is well established in sports. However, it is unknown if coaches are able to accurately observe exertion of individual players during training. Furthermore, the discrepancy in coaches' and players' perceptions has not been explained. PURPOSE: We aim to 1) determine the relation between intended and observed training exertion by the coach and perceived training exertion by the player and 2) establish if on-field training characteristics, intermittent endurance capacity and maturity status explain the mismatch...
September 6, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27591561/early-childhood-growth-patterns-and-school-age-respiratory-resistance-fractional-exhaled-nitric-oxide-and-asthma
#8
Maribel Casas, Herman T den Dekker, Claudia J Kruithof, Irwin K Reiss, Martine Vrijheid, Johan C de Jongste, Vincent W V Jaddoe, Liesbeth Duijts
BACKGROUND: Greater infant weight gain is associated with lower lung function and increased risk of childhood asthma. The role of early childhood peak growth patterns is unclear. We assessed the associations of individually derived early childhood peak growth patterns with respiratory resistance, fractional exhaled nitric oxide, wheezing patterns, and asthma until school-age. METHODS: We performed a population-based prospective cohort study among 5364 children. Repeated growth measurements between 0 and 3 years of age were used to derive standard deviation scores (s...
October 5, 2016: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/27575249/single-leg-squat-performance-in-active-adolescents-age-8-to-17-years
#9
Cristine E Agresta, Chris Church, John Henley, Tim Duer, Kathleen OʼBrien
Over 30 million US adolescents participate in sport and exercise. Lower extremity injury from sport participation accounts for up to 89% of injuries each year. The single leg squat (SLS) is a simple clinical tool that assesses lower extremity mechanics often associated with injury risk. To date, there is limited information regarding SLS performance in healthy children. Such information could be useful when assessing youth athletes to determine if mechanics demonstrated are different than is to be expected and puts them at risk for injury...
August 26, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27562617/spinal-growth-velocity-versus-height-velocity-in-predicting-curve-progression-in-peri-pubertal-girls-with-idiopathic-scoliosis
#10
Benlong Shi, Saihu Mao, Zhen Liu, Xu Sun, Zezhang Zhu, Feng Zhu, Jack C Y Cheng, Yong Qiu
BACKGROUND: Height velocity (HV) is traditionally used to monitor the residual growth potential in idiopathic scoliosis (IS). The temporal timing of rapid increase in standing height often does not match exactly that of the increase in spine height. The purposes of this study were to analyze the correlation between change of angle velocity (AV) vs the changes of spinal growth velocity (SGV) and HV, and the associated predictive value on curve progression in IS. METHODS: Pre-pubertal IS girls with single curve receiving standardized bracing treatment followed longitudinally with documented curve progression >5° were retrospectively reviewed...
2016: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/27556581/sex-differences-and-growth-related-adaptations-in-bone-microarchitecture-geometry-density-and-strength-from-childhood-to-early-adulthood-a-mixed-longitudinal-hr-pqct-study
#11
Leigh Gabel, Heather M Macdonald, Heather A McKay
Sex differences in bone strength and fracture risk are well-documented. However, we know little about bone strength accrual during growth and adaptations in bone microstructure, density and geometry that accompany gains in bone strength. Thus, our objectives are to 1) describe growth related adaptations in bone microarchitecture, geometry, density and strength at the distal tibia and radius in boys and girls; 2) compare differences in adaptations in bone microarchitecture, geometry, density and strength between boys and girls...
August 24, 2016: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/27504832/biological-maturity-status-strongly-intensifies-the-relative-age-effect-in-alpine-ski-racing
#12
Lisa Müller, Erich Müller, Carolin Hildebrandt, Christian Raschner
The relative age effect (RAE) is a well-documented phenomenon in youth sports. This effect exists when the relative age quarter distribution of selected athletes shows a biased distribution with an over-representation of relatively older athletes. In alpine ski racing, it exists in all age categories (national youth levels up to World Cup). Studies so far could demonstrate that selected ski racers are relatively older, taller and heavier. It could be hypothesized that relatively younger athletes nearly only have a chance for selection if they are early maturing...
2016: PloS One
https://www.readbyqxmd.com/read/27454545/a-meta-analysis-of-maturation-related-variation-in-adolescent-boy-athletes-adaptations-to-short-term-resistance-training
#13
Jason Moran, Gavin R H Sandercock, Rodrigo Ramírez-Campillo, César Meylan, Jay Collison, Dave A Parry
This meta-analysis investigated the maturation-related pattern of adaptations to resistance training in boy athletes. We included studies examining the effects of 4-16-week resistance training programmes in healthy boy athletes aged 10-18 years. Pooled estimates of effect size for change in strength across all studies (n = 19) were calculated using the inverse-variance random effects model for meta-analyses. Estimates were also calculated for groups based on likely biological maturity status ("before", "during" and "after" peak height velocity)...
July 25, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27434083/the-influence-of-maturation-on-sprint-performance-in-boys-over-a-21-month-period
#14
Robert W Meyers, Jon L Oliver, Michael G Hughes, Rhodri S Lloyd, John B Cronin
PURPOSE: This study examined how the characteristics of maximal overground sprint performance are affected by the period of peak height velocity (PHV) in boys. METHODS: One hundred and eighty-nine school-aged boys completed two assessments of maximal sprint performance, separated by a 21-month period. Kinematic characteristics of sprint performance were collected during a 30 m sprint using a floor-level optical measurement system, with modelled force and stiffness characteristics also calculated...
July 18, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27433884/sprint-kayaking-and-canoeing-performance-prediction-based-on-the-relationship-between-maturity-status-anthropometry-and-physical-fitness-in-young-elite-paddlers
#15
Daniel López-Plaza, Fernando Alacid, José María Muyor, Pedro Ángel López-Miñarro
This study aimed to identify the maturity-related differences and its influence on the physical fitness, morphological and performance characteristics of young elite paddlers. In total, 89 kayakers and 82 canoeists, aged 13.69 ± 0.57 years (mean ± s), were allocated in three groups depending on their age relative to the age at peak height velocity (pre-APHV, circum-APHV and post-APHV) and discipline (kayak and canoe). Nine anthropometric variables, a battery of four physical fitness tests (overhead medicine ball throw, countermovement jump, sit-and-reach test and 20 m multistage shuttle run test) and three specific performance tests (1000, 500 and 200 m) were assessed...
July 19, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27401728/pubertal-timing-and-bone-phenotype-in-early-old-age-findings-from-a-british-birth-cohort-study
#16
Diana Kuh, Stella G Muthuri, Adam Moore, Tim J Cole, Judith E Adams, Cyrus Cooper, Rebecca Hardy, Kate A Ward
OBJECTIVES: To investigate the effect of pubertal timing, assessed in adolescence, on bone size, strength and density in men and women in early old age. DESIGN: A British birth cohort study with prospective indicators of pubertal timing based on age at menarche, clinical assessment of pubertal stage, and growth tempo from serial height measures, and bone measures derived from peripheral quantitative computed tomography (pQCT) and dual-energy X-ray absorptiometry (DXA) at 60-64 years of age among 866 women and 792 men...
August 2016: International Journal of Epidemiology
https://www.readbyqxmd.com/read/27362075/age-of-peak-height-velocity-to-predict-biological-maturity-in-professional-adolescent-mexican-soccer-players-3709-board-148-june-4-8-00-am-9-30-am
#17
Maria F Bernal-Orozco, Margarita Posada-Falomir, Celia M Quiñónez-Gastélum, Paola Plascencia-Aguilera, Paola Plascencia-Aguilera, Juan R Arana-Nuño, Juan P Tamayo-González, Rafael Ortega-Orozco, Gabriela Macedo-Ojeda, Fabiola Márquez-Sandoval, Barbara Vizmanos-Lamotte
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27359766/maturity-related-differences-in-bilateral-handgrip-strength-parameters-following-peak-height-velocity-in-youth-judo-athletes-511-board-348-june-1-9-30-am-11-00-am
#18
Kyle S Beyer, David H Fukuda, Ran Wang, Michael B La Monica, Tyler W D Muddle, Jay R Hoffman, Jeffrey R Stout
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27291423/sexual-dimorphism-in-growth-in-the-relative-length-of-the-forearm-and-relative-knee-height-during-adolescence
#19
Natalia Nowak-Szczepanska, Slawomir Koziel
There are numerous studies concerning sexual dimorphism in body proportions, but only a few have investigated growth in the relative length of particular segments of the upper and lower limbs during adolescence. The aim of the study is an assessment of sex differences of longitudinal growth in the relative length of the forearm and knee height among adolescents. Sample involved 121 boys and 111 girls, participants of the Wroclaw Growth Study, examined annually between 8 and 18 years of age. Sexual dimorphism in six ratios: forearm length and knee height relatively to: trunk, height, and limb length were analyzed using a two-way analysis of variance with repeated measurements...
October 2016: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/27267385/biological-maturation-central-adiposity-and-metabolic-risk-in-adolescents-a-mediation-analysis
#20
André O Werneck, Danilo R Silva, Paul J Collings, Rômulo A Fernandes, Enio R V Ronque, Décio S Barbosa, Edilson S Cyrino
BACKGROUND: Earlier biological maturation has been related to increased metabolic risk. In this study, we verified mediating effects by central adiposity of the relationship between somatic maturity and metabolic risk factors in adolescents. METHODS: In a cross-sectional study, 1034 adolescents aged 10-16 years from Londrina/PR/Brazil were evaluated. The age of peak height velocity (PHV) method was used to evaluate somatic maturity. Central adiposity was estimated through waist circumference measurements...
October 2016: Childhood Obesity
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