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Growth spurt peak height velocity

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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
#1
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/27743496/being-born-large-for-gestational-age-is-associated-with-earlier-pubertal-take-off-and-longer-growth-duration-a-longitudinal-study
#2
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
#3
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/27291423/sexual-dimorphism-in-growth-in-the-relative-length-of-the-forearm-and-relative-knee-height-during-adolescence
#4
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/27018860/higher-anterior-knee-laxity-influences-the-landing-biomechanics-displayed-by-pubescent-girls
#5
Catherine Y Wild, Bridget J Munro, Julie R Steele
Despite an increase in anterior knee laxity (AKL) during the adolescent growth spurt in girls, it is unknown whether landing biomechanics are affected by this change. This study investigated whether pubescent girls with higher AKL displayed differences in their lower limb strength or landing biomechanics when performing a horizontal leap movement compared to girls with lower AKL. Forty-six pubescent girls (10-13 years) were tested at the time of their peak height velocity (PHV). Passive AKL was quantified and used to classify participants into higher (HAKL; peak displacement > 4 mm) and lower (LAKL; peak displacement < 3 mm) AKL groups (n = 15/group)...
March 28, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/26912286/how-young-girls-change-their-landing-technique-throughout-the-adolescent-growth-spurt
#6
Catherine Y Wild, Bridget J Munro, Julie R Steele
BACKGROUND: Despite the rapid musculoskeletal changes experienced by girls throughout the adolescent growth spurt, little is known about how their lower limb landing technique changes during this time. PURPOSE: To investigate the longitudinal changes in the 3-dimensional lower limb kinematics, joint moments, and muscle activation patterns displayed by girls when performing a horizontal landing task throughout their adolescent growth spurt. STUDY DESIGN: Descriptive laboratory study...
May 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/26084525/biological-maturation-of-youth-athletes-assessment-and-implications
#7
REVIEW
Robert M Malina, Alan D Rogol, Sean P Cumming, Manuel J Coelho e Silva, Antonio J Figueiredo
The search for talent is pervasive in youth sports. Selection/exclusion in many sports follows a maturity-related gradient largely during the interval of puberty and growth spurt. As such, there is emphasis on methods for assessing maturation. Commonly used methods for assessing status (skeletal age, secondary sex characteristics) and estimating timing (ages at peak height velocity (PHV) and menarche) in youth athletes and two relatively recent anthropometric (non-invasive) methods (status-percentage of predicted near adult height attained at observation, timing-predicted maturity offset/age at PHV) are described and evaluated...
July 2015: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/25724575/new-perspectives-on-the-relationship-between-mandibular-and-statural-growth
#8
Raphael Patcas, Guido Herzog, Timo Peltomäki, Goran Markic
BACKGROUND: Condylar and somatic growth have similar growth curves. The aim of this study was to compare both growth curves in untreated subjects at different ages and investigate if a correlation factor (CF) could be established. MATERIAL AND METHODS: Semi-longitudinal records (cephalograms and body height) of 418 untreated, healthy children (193 girls and 225 boys) from a craniofacial growth study were analyzed. Incremental changes of three mandibular measurements from articulare and three from condylion were compared to statural growth changes separately...
February 2016: European Journal of Orthodontics
https://www.readbyqxmd.com/read/25710395/-the-assessment-of-biological-maturation-for-talent-selection-which-method-can-be-used
#9
L Müller, E Müller, C Hildebrandt, K Kapelari, C Raschner
BACKGROUND: The biological maturity status plays an important role in sports, since it influences the performance level and the talent selection in various types of sport. More mature athletes are favorably selected for regional and national squads. Therefore, the biological maturity status should be considered during the talent selection process. In this context, the relative age effect (RAE), which exists when the relative age quarter distribution of selected sports groups shows a biased distribution with an over-representation of athletes born in the first months after the specific cut-off-date for the competition categories, represents another problem in the talent development...
March 2015: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/25476426/-retrospective-mixed-longitudinal-study-on-the-growth-trajectory-of-height-among-children-and-adolescents
#10
Xinnan Zong, Hui Li, Yaqin Zhang, Hui Zhang
OBJECTIVE: Longitudinal studies in height for school-age children and adolescents mainly focused on the velocity, spurt and peak of growth, and currently no changing growth trajectory or channel around the baseline were reported except the shift of percentiles among infants. This study aimed to analyze general characteristic of the growth trajectory of height among children and adolescents so as to provide scientific evidence for early detecting height deviation and evaluating treatment interventions for pediatric clinical and health care professionals...
September 2014: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/25418044/the-relationship-between-insulin-like-growth-factor-1-sex-steroids-and-timing-of-the-pubertal-growth-spurt
#11
T J Cole, M L Ahmed, M A Preece, P Hindmarsh, D B Dunger
OBJECTIVE: Progress through puberty involves a complex hormonal cascade, but the individual contributions of hormones, particularly IGF-1, are unknown. We reanalysed Chard growth study data to explore the tempo of puberty based on changes in both height and hormone levels, using a novel method of growth curve analysis. DESIGN AND SUBJECTS: Schoolboys (n = 54) and girls (n = 70) from Chard, Somerset, England, recruited in 1981 at age 8/9 and followed to age 16. MEASUREMENTS: Every 6 months, height and Tanner stages (genitalia, breast, pubic hair) were recorded, and in a subsample (24 boys, 27 girls), blood samples were taken...
June 2015: Clinical Endocrinology
https://www.readbyqxmd.com/read/25111886/impact-of-long-term-erythrocytapheresis-on-growth-and-peak-height-velocity-of-children-with-sickle-cell-disease
#12
Abhishek Bavle, Ashok Raj, Maiying Kong, Salvatore Bertolone
BACKGROUND: Children with sickle cell disease (SCD) lag in weight and height and have a delayed growth spurt compared to normal children. We studied the effect of long-term erythrocytapheresis (LTE) on the growth of children with SCD and the age at which they attained peak height velocity. PROCEDURE: A retrospective chart review was performed recording weight, height, and body mass index (BMI) measurements of 36 patients with SCD who received LTE every 3-5 weeks for an average duration of 5 years...
November 2014: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/24892233/validation-of-maturity-offset-in-a-longitudinal-sample-of-polish-girls
#13
Robert M Malina, Sławomir M Kozieł
This study attempted to validate an anthropometric equation for predicting age at peak height velocity (PHV) in 198 Polish girls followed longitudinally from 8 to 18 years. Maturity offset (years before or after PHV) was predicted from chronological age, mass, stature, sitting height and estimated leg length at each observation; predicted age at PHV was the difference between age and maturity offset. Actual age at PHV for each girl was derived with Preece-Baines Model 1. Predicted ages at PHV increased from 8 to16 years and varied relative to time before and after actual age at PHV...
2014: Journal of Sports Sciences
https://www.readbyqxmd.com/read/24392758/scaling-left-ventricular-mass-in-adolescent-boys-aged-11-15-years
#14
João Valente-Dos-Santos, Manuel J Coelho-E-Silva, António Ferraz, Joaquim Castanheira, Enio R Ronque, Lauren B Sherar, Marije T Elferink-Gemser, Robert M Malina
BACKGROUND: Normalizing left ventricular mass (LVM) for inter-individual variation in body size is a central issue in human biology. During the adolescent growth spurt, variability in body size descriptors needs to be interpreted in combination with biological maturation. AIM: To examine the contribution of biological maturation, stature, sitting height, body mass, fat-free mass (FFM) and fat mass (FM) to inter-individual variability in LVM in boys, using proportional allometric modelling...
September 2014: Annals of Human Biology
https://www.readbyqxmd.com/read/24286907/evaluating-the-agreement-of-skeletal-age-assessment-based-on-hand-wrist-and-cervical-vertebrae-radiography
#15
Philipp Beit, Timo Peltomäki, Marc Schätzle, Luca Signorelli, Raphael Patcas
INTRODUCTION: The aim of this study was to examine the agreement of skeletal age assessment based on hand-wrist radiographs with cephalogram-based cervical vertebrae evaluation. To circumvent bias and loss of information from staging, a quantitative approach was applied to determine morphologic changes. METHODS: We analyzed 730 sets of radiographs (cephalogram and hand-wrist) of untreated subjects (352 boys, 378 girls; age range, 6-18 years) from a growth study, each sex as a separate sample...
December 2013: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/24149415/advances-in-paediatric-strength-assessment-changing-our-perspective-on-strength-development
#16
REVIEW
Mark De Ste Croix
Our knowledge of the age and sex associated changes in strength during childhood and adolescence is relatively limited compared to other physiological parameters. However, those studies available on the age and sex associated change in strength are relatively consistent, especially for the lower limbs. Caution must be taken when transferring this knowledge to other muscle joints as the development in strength appears to be both muscle action and joint specific. Strength appears to increase in both boys and girls until about the age of 14 y where it begins to plateau in girls and a spurt is evident in boys...
2007: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/24118076/the-effect-of-maturation-on-adaptations-to-strength-training-and-detraining-in-11-15-year-olds
#17
C M P Meylan, J B Cronin, J L Oliver, W G Hopkins, B Contreras
To investigate how maturity status modifies the effects of strength training and detraining on performance, we subjected 33 young men to 8 weeks of strength training twice per week followed by 8 weeks without training. Changes in performance tests were analyzed in three maturity groups based on years from/to age of predicted peak height velocity (PHV): pre-PHV (-1.7 ± 0.4 years; n = 10), mid-PHV (-0.2 ± 0.4 years; n = 11), and post-PHV (1.0 ± 0.4 years; n = 12). Mean training effects on one repetition maximum strength (3...
June 2014: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/24022568/sport-injuries-aligned-to-peak-height-velocity-in-talented-pubertal-soccer-players
#18
A van der Sluis, M T Elferink-Gemser, M J Coelho-e-Silva, J A Nijboer, M S Brink, C Visscher
In young athletes, demands of sports are superimposed on normal growth and maturation. It has been suggested that this causes a temporarily increased vulnerability for injuries. We followed 26 talented soccer players (mean age 11.9±0.84 years) longitudinally for 3 years around their adolescent growth spurt, called Peak Height Velocity, to identify differences in number of traumatic and overuse injuries and days missed due to injuries. Peak Height Velocity was calculated according to the Maturity Offset Protocol...
April 2014: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/23974858/reference-values-of-osteocalcin-and-procollagen-type-i-n-propeptide-plasma-levels-in-a-healthy-central-european-population-aged-0-18-years
#19
M Bayer
UNLABELLED: The aim of this study was to assess the relationships between both a marker of bone formation and a marker of bone turnover and age, sex, and pubertal stage in a group (n = 439) of healthy children and adolescents. These reference data should be instrumental in interpretation of results. INTRODUCTION: The skeletal system has high metabolic activity. In children, bone markers may be useful in diagnostics and treatment management of skeletal diseases but there could be difficulties with interpretation of results...
February 2014: Osteoporosis International
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