scholarly journals Predictive Modeling of VO2max Based on 20 m Shuttle Run Test for Young Healthy People

2018 ◽  
Vol 8 (11) ◽  
pp. 2213 ◽  
Author(s):  
Krzysztof Przednowek ◽  
Zbigniew Barabasz ◽  
Maria Zadarko-Domaradzka ◽  
Karolina Przednowek ◽  
Edyta Nizioł-Babiarz ◽  
...  
Keyword(s):  
Classical Model ◽  
Ordinary Least Squares ◽  
Healthy People ◽  
Lasso Regression ◽  
Anthropometric Parameters ◽  
Rbf Network ◽  
Regularized Methods ◽  
Leave One Out ◽  
Run Test ◽  
Shuttle Run

This study presents mathematical models for predicting VO2max based on a 20 m shuttle run and anthropometric parameters. The research was conducted with data provided by 308 young healthy people (aged 20.6 ± 1.6). The research group includes 154 females (aged 20.3 ± 1.2) and 154 males (aged 20.8 ± 1.8). Twenty-four variables were used to build the models, including one dependent variable and 23 independent variables. The predictive methods of analysis include: the classical model of ordinary least squares (OLS) regression, regularized methods such as ridge regression and Lasso regression, artificial neural networks such as the multilayer perceptron (MLP) and radial basis function (RBF) network. All models were calculated in R software (version 3.5.0, R Foundation for Statistical Computing, Vienna, Austria). The study also involved variable selection methods (Lasso and stepwise regressions) to identify optimum predictors for the analysed study group. In order to compare and choose the best model, leave-one-out cross-validation (LOOCV) was used. The paper presents three types of models: for females, males and the whole group. An analysis has revealed that the models for females ( RMSE C V = 4.07 mL·kg−1·min−1) are characterised by a smaller degree of error as compared to male models ( RMSE C V = 5.30 mL·kg−1·min−1). The model accounting for sex generated an error level of RMSE C V = 4.78 mL·kg−1·min−1.

Validity of the Multistage 20-M Shuttle-Run Test for Japanese Children, Adolescents, and Adults

2004 ◽  
Vol 16 (2) ◽  
pp. 113-125 ◽  
Author(s):  
Akira Matsuzaka ◽  
Yuko Takahashi ◽  
Masayuki Yamazoe ◽  
Naomi Kumakura ◽  
Akiko Ikeda ◽  
...  
Keyword(s):  
Stepwise Regression ◽  
Peak Oxygen Uptake ◽  
Regression Equations ◽  
Japanese Children ◽  
Anthropometric Parameters ◽  
Independent Variables ◽  
Adolescents And Adults ◽  
Run Test ◽  
The Relationship ◽  
Shuttle Run

The purpose of this study was to examine the validity of a 20-m shuttle-run test as an aerobic fitness test for Japanese children, adolescents, and young adults. Participants were 62 boys and 70 girls aged 8–17 years and 56 men and 99 women aged 18–23 years. Stepwise regression analysis was used to elucidate the relationship between shuttle-run performance, age, gender, and anthropometric parameters (as independent variables) and peak oxygen uptake (VO2peak), determined directly on a treadmill, as a dependent variable. We observed high multiple correlations for adults (R2 = .88) and for children and adolescents (R2 = .80). Therefore, it is suggested that our multiple regression equations are more appropriate for predicting VO2peak in Japanese children, adolescents, and adults.

scholarly journals „Z”-scores of anthropometric and motor parameters of girls in aerobic gymnastics

2014 ◽  
Vol 61 (2) ◽  
pp. 55-58
Author(s):  
M. Tibenská ◽  
H. Medeková
Keyword(s):  
Body Weight ◽  
Body Height ◽  
Sport Performance ◽  
Z Score ◽  
Anthropometric Parameters ◽  
Percentage Of Body Fat ◽  
Standing Long Jump ◽  
Z Scores ◽  
Long Jump ◽  
Shuttle Run

Abstract This study presents the evaluation of chosen anthropometric and motor parameters in group of female junior competitors throughout the course of 2-year preparation of aerobic gymnastics by means of Z-scores. The observed group consisted of 12 girls (average age at the beginning of observance 14.08 ± 1.19 years). Evaluation of anthropometric (body height, body weight, body mass index, percentage of body fat, acting body weight) and motor parameters (sit-ups in 30 seconds and 60 seconds, pull-ups to bar, modified push-ups, standing long jump, backwards tandem walking, shuttle run 4×10 m, Jacík’s test) was carried out in standard conditions in nine girls at 3-month intervals. It has been confirmed that female probands with higher Z-score of motor parameters together with lower Z-score of anthropometric parameters achieved higher sport performance during the 2-year observance at competitions, with an exception of one such proband.

Effects of School-Based Cardiovascular-Fitness Training in Children with Mental Retardation

2007 ◽  
Vol 19 (2) ◽  
pp. 171-178 ◽  
Author(s):  
Tarik Ozmen ◽  
Necmiye Un Yildirim ◽  
Bekir Yuktasir ◽  
Michael W. Beets
Keyword(s):  
Mental Retardation ◽  
Training Program ◽  
Cardiovascular Fitness ◽  
Percent Body Fat ◽  
Peak Heart Rate ◽  
School Based ◽  
Fitness Training ◽  
Run Test ◽  
And Control ◽  
Shuttle Run

The aim of this study was to investigate the effects of a school-based cardiovascular-fitness-training program in children with mental retardation (MR). Thirty boys (8−15 years old) with mild to moderate mental retardation were randomly divided into 2 groups—experimental (EX) and control (CN). The EX group underwent 10 weeks of training 3 times/week for a duration of 1 hr/session at 60-80% peak heart rate. At Week 10, significant increases in 20-m shuttle-run-test (20-MST) laps were observed for the EX group. No improvements were found in percent body fat. No changes were observed for the CN. The school-based training program might prove useful in improving the cardiovascular fitness of children with MR.

Physical Activity, Motor Ability, and School Readiness of 6-Yr.-Old Children

2002 ◽  
Vol 95 (2) ◽  
pp. 407-415 ◽  
Author(s):  
Leila Oja ◽  
Toivo Jürimäe
Keyword(s):  
Physical Activity ◽  
Preschool Children ◽  
School Readiness ◽  
Physical Activities ◽  
Healthy Children ◽  
Motor Ability ◽  
Ability Tests ◽  
Mental Abilities ◽  
Run Test ◽  
Shuttle Run

The aim of this investigation was to study the relationships between physical activity, motor ability, and school readiness in 6-yr.-old children. In total, 294 healthy children from Tartu were studied (161 boys and 133 girls). The physical activity of children was reported by parents and teachers using the questionnaire of Harro. The motor ability of children was evaluated using various tests from the Eurofit test battery as well as the 3-min. endurance shuttle run test. The Controlled Drawing Observation test was used as a predictor of school readiness and development of mental abilities. Indoor physical activities predicted 19–25% of total variance in motor scores for these preschool children. Motor ability tests, which demand children's total attention and concentration, appear related to the chosen measures of school readiness.

scholarly journals The Effects of Climate Therapy on Cardiorespiratory Fitness and Exercise-Induced Bronchoconstriction in Children with Asthma

Atmosphere ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1486
Author(s):  
Carlo De Pieri ◽  
Michele Arigliani ◽  
Maria Pia Francescato ◽  
Maurizio Droli ◽  
Michael Vidoni ◽  
...  
Keyword(s):  
Urban Area ◽  
Positive Impact ◽  
Asthmatic Children ◽  
Children With Asthma ◽  
Z Scores ◽  
Exercise Induced ◽  
Run Test ◽  
Age Range ◽  
Cardiorespiratory Endurance ◽  
Shuttle Run

We investigated whether a 1-week stay in the mountains may have a positive impact on Exercise-Induced Bronchoconstriction (EIB) and cardiorespiratory endurance in asthmatic children from an urban area. Spirometry was performed before and 10 min after a 20 m shuttle run test (20mSRT) on the first and seventh day of a summer asthma camp in the Italian Alps at 900 m of altitude. Spirometry z-scores were derived from the Global Lung Initiative 2012 prediction equations, and percentiles of the 20mSRT performance were assigned according to De Miguel-Etayo’s and Tomkinson’s predictive equations. A FEV1 decrease ≥10% after the exercise was defined as EIB. Particulate matter pollution was monitored during the camp and in the urban area of provenience. Twenty-four subjects (age range 7–16 years) were included. Frequency of EIB decreased from 58% (14/24) at day-1 to 33% (8/24) at the end of the camp (p = 0.08). Most subjects with a 20mSRT in the lowest quartile at day 1 had EIB (9/11). The proportion of children with a 20mSRT <25° percentile decreased from 45% (11/24) at day-1 to 16% (4/24) at day-7 (p = 0.02). Conclusion: One-week climate therapy in the mountains improved both bronchial hyperreactivity and cardiorespiratory endurance in our cohort of asthmatic children.

scholarly journals Development of multistage 10-m shuttle run test for VO2max estimation in healthy adults

2021 ◽  
Keyword(s):  
Cross Validation ◽  
Age Groups ◽  
Healthy Adults ◽  
Coefficient Of Determination ◽  
Validation Test ◽  
Uniform Distributions ◽  
Gender And Age ◽  
Run Test ◽  
Shuttle Run ◽  
Spatial Limitation

Background and objective: The disadvantage of the traditional 20-m multistage shuttle run test (MST) is that it requires a long space for measurements and does not include various age groups to develop the test. Therefore, we developed a new MST to improve the spatial limitation by reducing the measurement to a 10-m distance and to resolve the bias via uniform distributions of gender and age. Material and methods: Study subjects included 120 healthy adults (60 males and 60 females) aged 20 to 50 years. All subjects performed a graded maximal exercise test (GXT) and a 10-m MST at five-day intervals. We developed a regression model using 70% of the subject's data and performed a cross-validation test using 30% of the data. Results: The male regression model's coefficient of determination (R2) was 58.8%, and the standard error of estimation (SEE) was 4.17 mL/kg/min. The female regression model's R2 was 69.2%, and the SEE was 3.39 mL/kg/min. The 10-m MST showed a high correlation with GXT on the VO2max (males: 0.816; females: 0.821). In the cross-validation test for the developed regression models, the male's SEE was 4.38 mL/kg/min, and the female's SEE was 4.56 mL/kg/min. Conclusion: Thus, the 10-m MST is an accurate and valid method for estimating the VO2max. Therefore, the 10-m MST developed by us can be used when the existing 20-m MST cannot be used due to spatial limitations and can be applied to both men and women in their 20s and 50s.

scholarly journals Efeito agudo de dois modelos de treinamento intervalado sobre a carga interna em atletas de futsal feminino

2020 ◽  
Vol 34 (3) ◽  
pp. 447-461
Author(s):  
Telmo Nunes da Silva ◽  
Renan Felipe Nunes ◽  
Marília Cavalcanti Serpa ◽  
Tiago Martins Coelho ◽  
Luiz Guilherme Guglielmo
Keyword(s):  
Tier 2 ◽  
Endurance Test ◽  
Run Test ◽  
Shuttle Run

O objetivo desse estudo foi analisar o efeito agudo em duas sessões de treinamento intervalado de alta intensidade (TIAI) sobre os valores de carga interna em atletas de futsal feminino. Treze jogadoras adultas (21,2±2,8 anos; 60,3±7,6 kg; 163±06 cm; 20,6%±5,7 gordura) foram submetidas a quatro sessões experimentais: 1) Antropometria e teste incremental em esteira rolante (TIER); 2) Futsal Intermittent Endurance Test (FIET); 3) Maximal Shuttle Run Test (40-m MST); 4) divididas randomicamente em dois grupos, aonde cada grupo completou um dos dois modelos de TIAI em duas sessões de treinamento, consistindo em 8 séries similares em relação esforço:pausa (1:1), distância relativa (m.min-1) de modo que gerasse a mesma intensidade de corrida relativa ao PV do FIET (100% do Pico de Velocidade), mas com número de mudanças de direção distintos (TIAI7,5x7,5=1 vs. TIAI15x15=3). Lactato sanguíneo (Lac), frequência cardíaca (FC) e percepção subjetiva de esforço (PSE) foram coletados. Não foram encontradas diferenças nas variáveis obtidas no TIER, FIET, 40-m MST e entre as médias de FC e PSE durante TIAI entre os grupos (p>0,05). Porém, mudanças foram reportadas ao longo do tempo para FC (F=15,207; p<0,05) e [Lac] (F=57,110; p<0,001) em ambos os grupos. Valores de [Lac] foram superiores no TIAI7,5x7,5 comparado ao TIAI15x15 na série 1 (F(2,28)=2,234; p<0,05), além disso, a análise de inferência demonstrou valores muito provavelmente maiores na série 1 (98/1/1) e provavelmente maiores na série 2 (93/5/2) ambos com grande tamanho do efeito(TE=1,31; TE=0,84). Com base nos resultados obtidos em uma sessão de treino, conclui-se que os ambos os modelos de TIAI são capazes de promover mudanças na carga interna em jogadoras de futsal em uma mesma proposta de sessão de treino.

scholarly journals Response to criticisms of the 20 m shuttle run test: deflections, distortions and distractions

2019 ◽  
Vol 53 (19) ◽  
pp. 1200-1201 ◽  
Author(s):  
Grant R Tomkinson ◽  
Justin J Lang ◽  
Luc A Léger ◽  
Timothy S Olds ◽  
Francisco B Ortega ◽  
...  
Keyword(s):  
Run Test ◽  
Shuttle Run
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