scholarly journals 67 PARENTAL HEIGHTS, TARGET-HEIGHT AND ADULT HEIGHT PROGNOSIS OF YOUNG FEMALE GYMNASTS AND SWIMMERS

1988 ◽  
Vol 24 (4) ◽  
pp. 528-528
Author(s):  
G Theintz ◽  
H Howald ◽  
Y Allemann ◽  
P C Sizonenko
Keyword(s):  
Adult Height ◽  
Young Female ◽  
Target Height ◽  
Female Gymnasts

The Influence of Biological Maturity on Sprint Speed, Standing Long Jump, and Vaulting Performance in Young Female Gymnasts

2020 ◽  
pp. 1-8
Author(s):  
Sylvia Moeskops ◽  
Jon L. Oliver ◽  
Paul J. Read ◽  
Gregory D. Myer ◽  
Rhodri S. Lloyd
Keyword(s):  
Adult Height ◽  
Velocity Ratio ◽  
Young Female ◽  
Regression Analyses ◽  
Standing Long Jump ◽  
Long Jump ◽  
Biological Maturity ◽  
Female Gymnasts ◽  
Peak Speed ◽  
Separate Regression

Purpose: To quantify speed, peak momentum, standing long jump (SLJ), and the ratio of vertical to horizontal take-off velocity (Ratiovert–hori TOV) in young female gymnasts of different maturity status and their influence on vaulting vertical TOV. Methods: One hundred twenty gymnasts age 5–14 years were subdivided into maturity groupings using percentage of predicted adult height. Participants performed three 20-m sprints, SLJ, and straight jump vaults that were recorded using 2-dimensional video and analyzed using digitizing software. Results: All speed intervals, peak speed, peak momentum, SLJ distance, vault height, and vertical TOV increased between the early prepubertal and late prepubertal (P < .001; d = 0.65–1.10) and early prepubertal and pubertal (P < .001; d = 0.75–1.00) groups. No differences between these metrics were observed between the 2 most mature groups (d = 0.01–0.55). Multiple regression analyses revealed peak speed had the strongest association with vertical TOV (R2 = 59%) and also identified the Ratiovert–hori as a secondary determinant (R2 = 12%). A separate regression model indicated that maturity status (percentage of predicted adult height) moderately influences vertical TOV during vaulting (R2 = 41%). Conclusion: Speed and SLJ performance increase between the early prepubertal and late prepubertal years in young female gymnasts. However, given that peak speed and Ratiovert–hori combined to explain 71% of the total variance in vaulting vertical TOV, in order to increase aerial time for more advanced vaulting, practitioners should attempt to enhance peak speed alongside takeoff technique to develop gymnasts’ ability to transfer linear speed to vertical TOV.

Long-Term Outcomes of Treatments for Central Precocious Puberty or Early and Fast Puberty in Chinese Girls

2019 ◽  
Vol 105 (3) ◽  
pp. 705-715 ◽  
Author(s):  
Junfen Fu ◽  
Jianwei Zhang ◽  
Ruimin Chen ◽  
Xiaoyu Ma ◽  
Chunlin Wang ◽  
...  
Keyword(s):  
Precocious Puberty ◽  
Adult Height ◽  
Central Precocious Puberty ◽  
Critical Parameters ◽  
Control Group ◽  
Target Height ◽  
Height Gain ◽  
Chinese Girls ◽  
Rhgh Treatment

Abstract Context Gonadotropin-releasing hormone analogues (GnRHa) and recombinant human growth hormone (rhGH) have been widely used to treat idiopathic central precocious puberty (CPP) or early and fast puberty (EFP). However, large-scale studies to evaluate the treatment effects on final adult height (FAH) are still lacking. Objective To assess the effects of long-term treatment for CPP/EFP on FAH and its main influencing factors. Design and Setting Retrospective, multicenter observational study from 1998 to 2017. Participants Four hundred forty-eight Chinese girls with CPP/EFP received GnRHa and rhGH treatment (n = 118), GnRHa alone (n = 276), or no treatment (n = 54). Main Outcome Measures FAH, target height (Tht), and predictive adult height (PAH). Results The height gain (FAH–PAH) was significantly different among the GnRHa and rhGH treatment, GnRHa alone, and no treatment groups (P &lt; 0.05; 9.51 ± 0.53, 8.07 ± 0.37, and 6.44 ± 0.91 cm, respectively). The genetic height gain (FAH–Tht) was 4.0 ± 0.5 cm for the GnRHa + rhGH group and 2.0 ± 0.27 cm for the GnRHa group, while the control group reached their Tht. In addition, 5 critical parameters derived from PAH, bone age, and Tht, showed excellent performance in predicting which patients could gain ≥5 cm (FAH–PAH), and this was further validated using an independent study. Conclusions The overall beneficial effect of GnRHa + rhGH or GnRHa on FAH was significant. The control group also reached their genetic target height. Clinicians are recommended to consider both the potential gains in height and the cost of medication.

Lipid profiles in young, female gymnasts

1984 ◽  
Vol 2 (2) ◽  
pp. 113-120 ◽  
Author(s):  
M.L. Zonderland ◽  
W.B.M. Erich ◽  
A.L. Peltenburg ◽  
M.J.E. Bernink
Keyword(s):  
Young Female ◽  
Lipid Profiles ◽  
Female Gymnasts

scholarly journals The Influence of Biological Maturity on Dynamic Force–Time Variables and Vaulting Performance in Young Female Gymnasts

2020 ◽  
Vol 2 (4) ◽  
pp. 319-329 ◽  
Author(s):  
Sylvia Moeskops ◽  
Jon L. Oliver ◽  
Paul J. Read ◽  
John B. Cronin ◽  
Gregory D. Myer ◽  
...  
Keyword(s):  
Predictive Ability ◽  
Cross Sectional Study ◽  
Young Female ◽  
Total Variance ◽  
Dynamic Force ◽  
Cross Sectional ◽  
Time Variables ◽  
Force Time ◽  
Biological Maturity ◽  
Female Gymnasts

Abstract Purpose This cross-sectional study investigated dynamic force–time variables and vaulting performance in young female gymnasts of different maturity status. Methods 120 gymnasts aged 5–14 years were sub-divided into maturity groupings using percent of predicted adult height (%PAH) attained. Participants performed three jumping protocols, the squat jump (SJ), countermovement jump (CMJ) and drop jump (DJ), before completing straight jump vaults that were recorded using two-dimensional video. Results Jumping performance improved with biological maturity evidenced by the most mature gymnasts’ producing significantly more absolute force (P < 0.05; all d > 0.78), impulse (P < 0.05; all d > 0.75) and power (P < 0.05; all d > 0.91) than the least mature group, resulting in the greater jump heights (P < 0.05; all d > 0.70). While, no significant differences were observed in relative peak force across multiple tests, measures of relative peak power did significantly increase with maturity. Based upon regression analyses, maturation was found to influence vertical take-off velocity during vaulting, explaining 41% of the variance in each jumping protocol. Across all tests, the DJ was found to have the highest predictive ability of vaulting vertical take-off velocity, explaining 55% of the total variance. Conclusion Biological maturation impacts jump height and underpinning mechanical variables in young female gymnasts. Vaulting vertical take-off velocity appears to be influenced by maturation and various dynamic force–time variables, particularly those during DJ, which had the highest explained total variance.

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