Jefferson Eduardo Hespanhol

Confiabilidade do teste de salto vertical com 4 séries de 15 segundos

Purpose: The purpose of this study was to check the reliability of the vertical jumping test and re-test in four series of the 15seconds test (IVJT). Method: Eighteen male volunteer athletes participated in this study, and they were divided as follows: eleven handball players (25.74 ± 4.71 years; 85.84 ± 7.63 kg; 182.14 ± 3.46 cm), and seven basketball players (18.60 ± 0.77 years; 83.82 ± 10.02 kg; 188.14 ± 5.76 cm). The assessed variables for the test and re-test were: power peak (PP), mean power (MP), and fatigue index (FI). The performances attained by them in these variables were measured through the vertical jumping test in four series of the 15-seconds test with 10 seconds recovery between series. The statistical treatment was performed through the descriptive technique and the intraclass correlation coefficient (ICC). Results: The results have shown a high ICC in the repeated measurements performed in different days for every variable: PP (r = 0.992; p = 0.0360); MP (r = 0.993; p = 0.0107); and FI (r = 0.981; p = 0.0556). Added to this, it was found high correlation coefficients between the test and re-test as to the quality indicators in the measurements of the vertical jumping technique with counter-movement without the help of the upper limbs (CMJ) (r = 0.991; p = 0.0800), for the amount of jumps together with a 15 and 60 seconds work (AVJ15s, r = 0.936; p = 0.0062, and AVJ60s, r = 0.978; p = 0.0139) and in the jumped height, in a 15 and 60 seconds work (VJ15s, r = 0.993; p = 0.0467, and VJ60s, r = 0.988; p = 0.0014). Conclusion: The data analysis pointed out the existence of a reliable measurement of the IVJT when assessing the explosive strength resistance through the MP and FI variables.PURPOSE: The purpose of this study was to check the reliability of the vertical jumping test and re-test in four series of the 15-seconds test (IVJT). METHOD: Eighteen male volunteer athletes participated in this study, and they were divided as follows: eleven handball players (25.74 ± 4.71 years; 85.84 ± 7.63 kg; 182.14 ± 3.46 cm), and seven basketball players (18.60 ± 0.77 years; 83.82 ± 10.02 kg; 188.14 ± 5.76 cm). The assessed variables for the test and re-test were: power peak (PP), mean power (MP), and fatigue index (FI). The performances attained by them in these variables were measured through the vertical jumping test in four series of the 15-seconds test with 10 seconds recovery between series. The statistical treatment was performed through the descriptive technique and the intraclass correlation coefficient (ICC). RESULTS: The results have shown a high ICC in the repeated measurements performed in different days for every variable: PP (r = 0.992; p = 0.0360); MP (r = 0.993; p = 0.0107); and FI (r = 0.981; p = 0.0556). Added to this, it was found high correlation coefficients between the test and re-test as to the quality indicators in the measurements of the vertical jumping technique with counter-movement without the help of the upper limbs (CMJ) (r = 0.991; p = 0.0800), for the amount of jumps together with a 15 and 60 seconds work (AVJ15s, r = 0.936; p = 0.0062, and AVJ60s, r = 0.978; p = 0.0139) and in the jumped height, in a 15 and 60 seconds work (VJ15s, r = 0.993; p = 0.0467, and VJ60s, r = 0.988; p = 0.0014). CONCLUSION: The data analysis pointed out the existence of a reliable measurement of the IVJT when assessing the explosive strength resistance through the MP and FI variables.

Avaliação da resistência de força explosiva em voleibolistas através de testes de saltos verticais

ABSTRACTAssessment of explosive strength-endurance in volleyballplayers through vertical jumping test The aim of this study was to verify the differences between thecontinuous jump test of 60 seconds (CJ60 sec) and the intermit-tent jump test of 4 sets of 15 seconds (IJ4x15 sec). The samplewas composed of 10 male volleyball players with 19.01 ± 1.36years, 191.5 ± 5.36 cm height and 81.74 ± 7.45 of body mass,who participated in this research as volunteers. The variables stud-ied were estimated as the peak power (PP), mean power (MP)and fatigue index (FI). These performances were measured throughtests of vertical jump with duration the 60 seconds and with theperformance of 4 sets of 15 seconds with 10 seconds of recoverybetween the sets. The data were analyzed through descriptivestatistics and the Wilcoxon test. The significance level was of p <0.05. It was possible to analyze that the continuous and the inter-mittent jump test presented significant differences in MP (p <0.05), FI (p < 0.01), and in the number of the vertical jump in 60seconds (p < 0.01), and the height in 60 seconds exercise (p <0.05). The MP found in IJ4x15sec was significantly higher than inthe CJ60 sec in volleyball players. In conclusion, the results sug-gest the existence of significant differences between the CJ60secand IJ4x15 sec.

Linear and nonlinear relationships between body mass index and physical fitness in Brazilian children and adolescents

The purpose of this study was to evaluate the linear and curvilinear relationship between body mass index (BMI) and physical fitness in children and adolescents.

The use of World Health Organization growth curves in children and adolescents that live in regions of moderate altitude

Objective: To determine the applicability of the World Health Organization growth curves in school children that live in areas of moderate altitude. Methods: A cross-sectional study, using a stratified random sample of 955 children and adolescents aged 6 to 12 years-old (473 boys and 482 girls) attending public schools in the urban area of Arequipa (Peru). The evaluated variables included body mass (kg) and height (m) values Marco Antonio Cossio Avenida Erico Verissimo, 701 – Cidade Universitaria CEP 13083-851 – Campinas/SP E-mail: mcossio1972@hotmail.com Fonte financiadora: Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (Capes) Conflito de interesse: nada a declarar Recebido em: 2/9/2011 Aprovado em: 23/1/2012OBJETIVO: Determinar la aplicabilidad del uso de curvas de crecimiento de la Organizacion Mundial de la Salud en escolares que viven en regiones de altitud moderada. METODOS: Estudio transversal, cuya poblacion fue constituida por una muestra probabilistica estratificada con 955 ninos y adolescentes de seis a 12 anos de edad, siendo 473 muchachos y 482 muchachas, que frecuentaban escuelas publicas de area urbana de la Region de Arequipa (Peru). Las variables evaluadas implicaron medidas de masa corporal (kg) y estatura (m) y el indice de masa corporal. Para las comparaciones, se utilizo el escore Z y la prueba t para medidas pareadas. RESULTADOS: Los muchachos presentaron valores similares de masa corporal cuando comparados con la referencia. Sin embargo, las muchachas mostraron valores superiores a la referencia en las edades de seis, siete y diez anos (p<0,001). En el caso de la estatura y del indice de masa corporal, hubo diferencias (p<0,001) entre la referencia de los escolares de moderada altitud en todas las edades y en ambos sexos, con estatura inferior a la referencia y, como consecuencia, mayor indice de masa corporal, siendo el escore Z para los muchachos: 1,0 (seis anos), 0,69 (siete anos), 0,50 (ocho anos), 1,20 (nueve anos), 0,75 (diez anos), 0,41 (11 anos) y 0,82 (12 anos) y, para las muchachas, 0,36 (seis anos), 0,53 (siete y ocho anos), 0,48 (nueve anos), 0,89 (diez anos), 0,55 (11 anos) y 0,43 (12 anos). CONCLUSIONES: El indice de masa corporal no debe ser aplicado a ninos y adolescentes de moderada altitud debido al retraso en el crecimiento lineal, lo que compromete el resultado final de este indice.

O uso das curvas de crescimento da Organização Mundial da Saúde em crianças e adolescentes que vivem em regiões de altitude moderada

Objective: To determine the applicability of the World Health Organization growth curves in school children that live in areas of moderate altitude. Methods: A cross-sectional study, using a stratified random sample of 955 children and adolescents aged 6 to 12 years-old (473 boys and 482 girls) attending public schools in the urban area of Arequipa (Peru). The evaluated variables included body mass (kg) and height (m) values Marco Antonio Cossio Avenida Erico Verissimo, 701 – Cidade Universitaria CEP 13083-851 – Campinas/SP E-mail: mcossio1972@hotmail.com Fonte financiadora: Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (Capes) Conflito de interesse: nada a declarar Recebido em: 2/9/2011 Aprovado em: 23/1/2012OBJETIVO: Determinar la aplicabilidad del uso de curvas de crecimiento de la Organizacion Mundial de la Salud en escolares que viven en regiones de altitud moderada. METODOS: Estudio transversal, cuya poblacion fue constituida por una muestra probabilistica estratificada con 955 ninos y adolescentes de seis a 12 anos de edad, siendo 473 muchachos y 482 muchachas, que frecuentaban escuelas publicas de area urbana de la Region de Arequipa (Peru). Las variables evaluadas implicaron medidas de masa corporal (kg) y estatura (m) y el indice de masa corporal. Para las comparaciones, se utilizo el escore Z y la prueba t para medidas pareadas. RESULTADOS: Los muchachos presentaron valores similares de masa corporal cuando comparados con la referencia. Sin embargo, las muchachas mostraron valores superiores a la referencia en las edades de seis, siete y diez anos (p<0,001). En el caso de la estatura y del indice de masa corporal, hubo diferencias (p<0,001) entre la referencia de los escolares de moderada altitud en todas las edades y en ambos sexos, con estatura inferior a la referencia y, como consecuencia, mayor indice de masa corporal, siendo el escore Z para los muchachos: 1,0 (seis anos), 0,69 (siete anos), 0,50 (ocho anos), 1,20 (nueve anos), 0,75 (diez anos), 0,41 (11 anos) y 0,82 (12 anos) y, para las muchachas, 0,36 (seis anos), 0,53 (siete y ocho anos), 0,48 (nueve anos), 0,89 (diez anos), 0,55 (11 anos) y 0,43 (12 anos). CONCLUSIONES: El indice de masa corporal no debe ser aplicado a ninos y adolescentes de moderada altitud debido al retraso en el crecimiento lineal, lo que compromete el resultado final de este indice.

Reliability of the four series 15-second vertical jumping test

Purpose: The purpose of this study was to check the reliability of the vertical jumping test and re-test in four series of the 15seconds test (IVJT). Method: Eighteen male volunteer athletes participated in this study, and they were divided as follows: eleven handball players (25.74 ± 4.71 years; 85.84 ± 7.63 kg; 182.14 ± 3.46 cm), and seven basketball players (18.60 ± 0.77 years; 83.82 ± 10.02 kg; 188.14 ± 5.76 cm). The assessed variables for the test and re-test were: power peak (PP), mean power (MP), and fatigue index (FI). The performances attained by them in these variables were measured through the vertical jumping test in four series of the 15-seconds test with 10 seconds recovery between series. The statistical treatment was performed through the descriptive technique and the intraclass correlation coefficient (ICC). Results: The results have shown a high ICC in the repeated measurements performed in different days for every variable: PP (r = 0.992; p = 0.0360); MP (r = 0.993; p = 0.0107); and FI (r = 0.981; p = 0.0556). Added to this, it was found high correlation coefficients between the test and re-test as to the quality indicators in the measurements of the vertical jumping technique with counter-movement without the help of the upper limbs (CMJ) (r = 0.991; p = 0.0800), for the amount of jumps together with a 15 and 60 seconds work (AVJ15s, r = 0.936; p = 0.0062, and AVJ60s, r = 0.978; p = 0.0139) and in the jumped height, in a 15 and 60 seconds work (VJ15s, r = 0.993; p = 0.0467, and VJ60s, r = 0.988; p = 0.0014). Conclusion: The data analysis pointed out the existence of a reliable measurement of the IVJT when assessing the explosive strength resistance through the MP and FI variables.PURPOSE: The purpose of this study was to check the reliability of the vertical jumping test and re-test in four series of the 15-seconds test (IVJT). METHOD: Eighteen male volunteer athletes participated in this study, and they were divided as follows: eleven handball players (25.74 ± 4.71 years; 85.84 ± 7.63 kg; 182.14 ± 3.46 cm), and seven basketball players (18.60 ± 0.77 years; 83.82 ± 10.02 kg; 188.14 ± 5.76 cm). The assessed variables for the test and re-test were: power peak (PP), mean power (MP), and fatigue index (FI). The performances attained by them in these variables were measured through the vertical jumping test in four series of the 15-seconds test with 10 seconds recovery between series. The statistical treatment was performed through the descriptive technique and the intraclass correlation coefficient (ICC). RESULTS: The results have shown a high ICC in the repeated measurements performed in different days for every variable: PP (r = 0.992; p = 0.0360); MP (r = 0.993; p = 0.0107); and FI (r = 0.981; p = 0.0556). Added to this, it was found high correlation coefficients between the test and re-test as to the quality indicators in the measurements of the vertical jumping technique with counter-movement without the help of the upper limbs (CMJ) (r = 0.991; p = 0.0800), for the amount of jumps together with a 15 and 60 seconds work (AVJ15s, r = 0.936; p = 0.0062, and AVJ60s, r = 0.978; p = 0.0139) and in the jumped height, in a 15 and 60 seconds work (VJ15s, r = 0.993; p = 0.0467, and VJ60s, r = 0.988; p = 0.0014). CONCLUSION: The data analysis pointed out the existence of a reliable measurement of the IVJT when assessing the explosive strength resistance through the MP and FI variables.

Waist Circumferences of Chilean Students: Comparison of the CDC-2012 Standard and Proposed Percentile Curves

The measurement of waist circumference (WC) is considered to be an important means to control overweight and obesity in children and adolescents. The objectives of the study were to (a) compare the WC measurements of Chilean students with the international CDC-2012 standard and other international standards, and (b) propose a specific measurement value for the WC of Chilean students based on age and sex. A total of 3892 students (6 to 18 years old) were assessed. Weight, height, body mass index (BMI), and WC were measured. WC was compared with the CDC-2012 international standard. Percentiles were constructed based on the LMS method. Chilean males had a greater WC during infancy. Subsequently, in late adolescence, males showed values lower than those of the international standards. Chilean females demonstrated values similar to the standards until the age of 12. Subsequently, females showed lower values. The 85th and 95th percentiles were adopted as cutoff points for evaluating overweight and obesity based on age and sex. The WC of Chilean students differs from the CDC-2012 curves. The regional norms proposed are a means to identify children and adolescents with a high risk of suffering from overweight and obesity disorders.

Aplicabilidad del IMC en adolescentes escolares que viven a moderada altitud del Perú

INTRODUCTION AND OBJECTIVES The use of BMI is highly contested, especially in populations in which growth phase is characterized by short stature for his age. The aim is to verify if the BMI is applicable to a school sample of adolescents living in a region of moderate altitude of Peru. MATERIAL AND METHODS A descriptive cross-sectional study in 319 adolescent students (181 men and 138 women) from 12.0 to 17.9 years of age. Anthropometric variables of height and weight were evaluated. Body Mass Index (BMI) was calculated. The CDC -2000 reference was used to compare weight and height from Z- score and BMI by mean difference. RESULTS The Z - score showed body weight to small variations (from -0.3 to 0.3 kg). In stature negative values for both sexes (men between -0.3 to -1.3 cm and women between -0.5 to 1.3 cm) is observed. For BMI, there were significant differences in all ages and in both sexes (p.

Referencial values for the physical growth of school children and adolescents in Campinas, Brazil.

Abstract Aims: To compare the values of weight, height and IMC with the regional curve (Cariri); to compare with the international references of the CDC-2000; and to construct references that will measure physical growth from childhood to adolescence. Subjects and methods: The sample consists of 6531 individuals with an age range of 6.0–17.9 years. Comparisons (weight, height and BMI) between the means of the group were made with the regional reference Cariri and the international reference CDC-2000. Results: The students of both sexes from Campinas were taller, heavier and presented more IMC than those from Cariri. With respect to CDC-2000, the girls were heavier until 12 years old and the boys were heavier until 15 years old. For height, the students of both sexes from Campinas were taller until age 10. In IMC, the students from Campinas showed superior qualities in relation to the reference in both sexes (for girls until age 14 and boys until 16 years old). Conclusion: Patterns of physical growth of children in Campinas are different in relation to the regional and international reference curve. The regional standards proposed are a possibility to assess the trajectory of physical growth of school children of Campinas in clinical or epidemiological settings.

Fat-free mass and bone mineral content positively affect peak torque production in Brazilian soccer players

BACKGROUND: Few studies thus far have investigated the relationship between body composition (in particular, bone components) and isokinetic strength performance. OBJECTIVE: To determine the relationship between bone mineral content (BMC), bone mineral density (BMD), and fat-free mass (FFM) with isokinetic strength performance variables in professional soccer players. METHODS: We recruited 20 elite male soccer players from the Brazilian league’s first division teams. Participants underwent a concentric isokinetic evaluation of knee flexor and extensor muscles. Dual-energy X-ray absorptiometry (DXA) was used to determine body composition. The relationships between variables were analyzed using Pearson’s product-moment correlation coefficient. RESULTS: Body composition variables were correlated with the strength output of knee flexor and extensor muscles in both lower limbs. FFM and BMC explained at least 50% of the variation in peak knee flexion and extension torque while BMD did not have the same effect. CONCLUSIONS: The relationships reported in this study indicate that the use of isokinetics and DXA in soccer players should be further investigated both for measuring athletic performance and for relevant clinical assessment.