Power Output in the Jump Squat in Adolescent Male Athletes

2011 ◽  
Vol 25 (3) ◽  
pp. 585-589 ◽  
Author(s):  
Andrea M Dayne ◽  
Jeffrey M McBride ◽  
James L Nuzzo ◽  
N Travis Triplett ◽  
Jared Skinner ◽  
...  
Keyword(s):  
Power Output ◽  
Adolescent Male ◽  
Male Athletes

Power Output In The Jump Squat In Adolescent Male Athletes

2010 ◽  
Vol 24 ◽  
pp. 1
Author(s):  
Andrea Dayne ◽  
Andrea M Dayne ◽  
James L Nuzzo ◽  
Jeffrey M McBride ◽  
Alan Burr ◽  
...  
Keyword(s):  
Power Output ◽  
Adolescent Male ◽  
Male Athletes

Reliability, Validity, and Performance Characteristics of Elite Adolescent Athletes at Different Stages of Maturityin the 10 to 5 Repeated Jump Test

2021 ◽  
pp. 1-8
Author(s):  
James Baker ◽  
Barry Shillabeer ◽  
Christopher Brandner ◽  
Philip Graham-Smith ◽  
Patrick Mills ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Intraclass Correlation ◽  
Performance Characteristics ◽  
Height Velocity ◽  
Adolescent Male ◽  
Male Athletes ◽  
Reliable Test ◽  
Jump Test ◽  
And Performance

Purpose: To examine the reliability, validity, and performance characteristics of the 10 to 5 repeated jump test (10–5 RJT) in adolescent male athletes. The 10–5 RJT has been shown to be a valid and reliable test of reactive strength index (RSI) in older adolescents (age 17–19 y), but less is known in younger adolescent athletes at different stages of maturity. Methods: Athletes (age 11–17 y) completed the 10–5 RJT on 2 days, 1 week apart, to examine the reliability (n = 41), validity (n = 18) of the test. Athletes were classified as pre, circa, or post peak height velocity (PHV) height velocity using maturity offset to examine the effect of maturation status on RSI, flight time (FT), ground contact time (GCT), and jump height (JH) (n = 68) using a cross-sectional design. Results: Paired samples t tests showed no significant differences (P ≥ .05), and Bland–Altman analysis showed no bias and close limits of agreement for RSI, JH, FT, and GCT between the contact mat and force plate. Interday reliability was rated excellent for RSI (intraclass correlation coefficient = .91) and good for GCT, FT, and JH (intraclass correlation coefficient = .81–.85). All variables had a coefficient of variation ≤ 10%. RSI increased across maturation groups, with significant differences between pre-PHV and post-PHV groups (P = .014, d = 1.00). Conclusion: The 10–5 RJT is a valid and reliable test for adolescent male athletes. Greater RSI with advancing maturity was primarily due to increased FT and JH, with GCT remaining similar.

Exploring the Relations between Social Support and Social Identity in Adolescent Male Athletes

2020 ◽  
pp. 1-7 ◽  
Author(s):  
Mark W. Bruner ◽  
Colin McLaren ◽  
Christian Swann ◽  
Matthew J. Schweickle ◽  
Andrew Miller ◽  
...  
Keyword(s):  
Social Support ◽  
Social Identity ◽  
Adolescent Male ◽  
Male Athletes

Vitamin D and Cortisol as Moderators of the Relationship Between Testosterone and Exercise Performance in Adolescent Male Athletes

2020 ◽  
Vol 32 (4) ◽  
pp. 204-209 ◽  
Author(s):  
Blair Crewther ◽  
Christian Cook ◽  
John Fitzgerald ◽  
Michal Starczewski ◽  
Michal Gorski ◽  
...  
Keyword(s):  
Effect Size ◽  
Exercise Performance ◽  
Muscle Power ◽  
Ice Hockey ◽  
Adolescent Male ◽  
Countermovement Jump ◽  
Cross Sectional ◽  
Male Athletes ◽  
Complex Interactions ◽  
Jump Power

Purpose: Reported associations between vitamin 25(OH)D and exercise performance are equivocal, perhaps due to complex interplay with cortisol and testosterone. In this study, the authors investigated serum 25(OH)D and cortisol as moderators of the testosterone relationship with exercise performance in adolescent male athletes. Methods: A total of 88 ice hockey players were assessed for serum 25(OH)D, cortisol, testosterone, body composition, and exercise performance, based on countermovement jump power and muscle torque. The authors tested independent relationships, before examining complex interactions via moderated regression analyses. Results: Most athletes (62.5%) exhibited a suboptimal (20–30 ng·mL−1) serum 25(OH)D concentration, whereas 9.1% of athletes were deficient (<20 ng·mL−1). Serum 25(OH)D was not related to performance when controlling for testing year, age, and fat mass. Further modeling revealed a significant hormonal interaction. Specifically, in low-25(OH)D subjects, testosterone predicted countermovement jump power at a high (β = 7.10, effect size = .43, P < .01), but not low (β = −3.32, effect size = −.20, P = .09), cortisol concentration. Conclusions: Serum 25(OH)D was a poor predictor of exercise performance, but it did moderate (with cortisol) the testosterone link to muscle power. Notably, this relationship emerged among individuals with a 25(OH)D concentration (∼22 ng·mL−1) approaching the deficiency cutoff. Viewing 25(OH)D as a moderating, rather than dose responsive, variable could help explain equivocal cross-sectional associations.

scholarly journals Effects of Combined Resistance Training and Weightlifting on Motor Skill Performance of Adolescent Male Athletes

2019 ◽  
Vol 33 (12) ◽  
pp. 3226-3235 ◽  
Author(s):  
Andrew W. Pichardo ◽  
Jon L. Oliver ◽  
Craig B. Harrison ◽  
Peter S. Maulder ◽  
Rhodri S. Lloyd ◽  
...  
Keyword(s):  
Resistance Training ◽  
Motor Skill ◽  
Adolescent Male ◽  
Male Athletes ◽  
Skill Performance

Using Repetitions to Fatigue to Predict One-Repetition Maximum Bench Press in Male High School Athletes

2004 ◽  
Vol 16 (3) ◽  
pp. 265-276 ◽  
Author(s):  
J. L. Mayhew ◽  
Chad D. Kerksick ◽  
Doug Lentz ◽  
John S. Ware ◽  
David L. Mayhew
Keyword(s):  
High School ◽  
Bench Press ◽  
Adolescent Male ◽  
High School Athletes ◽  
Male Athletes ◽  
Repetition Maximum ◽  
Male High School ◽  
Press Performance ◽  
New Equation ◽  
High School Athletic

The purpose of this study was to evaluate the effectiveness of repetitions to fatigue (RTF) for estimating one-repetition maximum (1-RM) bench press performance in male high school athletes. Members of high school athletic teams (N = 213, age = 16.3 ± 1.1 yrs, weight = 79.9 ± 16.7 kg) from four states were tested for 1-RM bench press and RTF after completing 4–6 weeks of resistance training. A new equation for use with male high school athletes was developed from a random sample of 180 participants; it appears to have excellent predictive potential (r = 0.96, SEE = 4.5 kg) and cross-validated well on a subsample (n = 33) from this population (r = 0.98, t = 0.64). Therefore, RTF can be used with acceptable accuracy to estimate maximal strength in the majority of adolescent male athletes who need to handle excessively heavy weights.

A Prediction Model for Peak Power Output From Different Incremental Exercise Tests

2006 ◽  
Vol 1 (2) ◽  
pp. 122-136 ◽  
Author(s):  
Hans Luttikholt ◽  
Lars R. McNaughton ◽  
Adrian W. Midgley ◽  
David J. Bentley
Keyword(s):  
Power Output ◽  
Peak Power ◽  
Cycle Ergometer ◽  
Incremental Exercise ◽  
Peak Power Output ◽  
Exercise Tests ◽  
Male Athletes ◽  
Power Profile ◽  
Wide Range ◽  
Level Of Agreement

Context:There is currently no model that predicts peak power output (PPO) thereby allowing comparison between different incremental exercise test (EXT) protocols. In this study we have used the critical power profile to develop a mathematical model for predicting PPO from the results of different EXTs.Purpose:The purpose of this study was to examine the level of agreement between actual PPO values and those predicted from the new model.Methods:Eleven male athletes (age 25 ± 5 years, VO2max 62 ± 8 mL · kg–1 · min–1) completed 3 laboratory tests on a cycle ergometer. Each test comprised an EXT consisting of 1-minute workload increments of 30 W (EXT30/1) and 3-minute (EXT25/3) and 5-minute workload increments (EXT25/5) of 25 W. The PPO determined from each test was used to predict the PPO from the remaining 2 EXTs.Results:The differences between actual and predicted PPO values were statistically insignificant (P > .05). The random error components of the limits of agreement of ≤30 W also indicated acceptable levels of agreement between actual and predicted PPO values.Conclusions:Further data collection is necessary to confirm whether the model is able to predict PPO over a wide range of EXT protocols in athletes of different aerobic and anaerobic capacities.

scholarly journals A 9-Month Jumping Intervention to Improve Bone Geometry in Adolescent Male Athletes

2018 ◽  
Vol 50 (12) ◽  
pp. 2544-2554 ◽  
Author(s):  
DIMITRIS VLACHOPOULOS ◽  
ALAN R. BARKER ◽  
ESTHER UBAGO-GUISADO ◽  
CRAIG A. WILLIAMS ◽  
LUIS GRACIA-MARCO
Keyword(s):  
Bone Geometry ◽  
Adolescent Male ◽  
Male Athletes

scholarly journals Silent subperiosteal iliac hematoma with bone radiolucency in adolescent male athletes

2020 ◽  
Vol 17 ◽  
pp. 198-202
Author(s):  
Satoshi Takenaka ◽  
Ken-ichiro Hamada ◽  
Hisashi Tanaka ◽  
Hidetatsu Outani ◽  
Norifumi Naka ◽  
...  
Keyword(s):  
Adolescent Male ◽  
Male Athletes
Sign in / Sign up

Export Citation Format

Share Document