Browsing by Author "Freitas, Jefferson Verbena de"

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    Do biological maturity and performance influence the training load of track and field athletes?
    (2019) Cruz, Ramon; Alves, Danilo Leonel; Domingos, Pablo Ramon; Freitas, Jefferson Verbena de; Werneck, Francisco Zacaron; Bertuzzi, Rômulo Cássio de Moraes; Oliveira, Fernando Roberto de
    It is necessary to clarify if BM and track and field performance can modulate the perception about RPE-session. The purpose of the present study was to verify if biological maturity and track and field-specific performance can be associated with training load (RPEsession method). Seventy-five young athletes (13-15 years old) of both genders participated in the present study. The experimental protocol lasted seven consecutive days. Performance tests (75-m running, long jump, 250-m running, shot put and 1000-m running) were made on the first day. After 48 hours, five days of track and field training it was prescribed, each day represents a training of each performance test. All training sessions had the same duration (120 min). The value of the training load was obtained multiplying the RPE value with training session duration (in minutes). For girls, the training load of 250-m training was correlated with biological maturity (r = -0.36, p = 0.02, n = 37) and specific performance (r = 0.33, p = 0.04, n = 37). All other analyzes indicate that biological maturity and track and field-specific performance do not influence the training load based on RPE-session method. Training load based on RPE-session is not influenced by biological maturity and track and field-specific performance, therefore can be used to control the training load of young track and field athletes. To girls it is necessary a care to control the training sessions intensity of 250-m running.
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    Maturation, morphological, motor and technical characteristics of under 16 female track and field athletes.
    (2020) Freitas, Jefferson Verbena de; Werneck, Francisco Zacaron; Souza, Renato Siqueira de; Castro, Phelipe Henrique Cardoso de; Figueiredo, António José Barata; Lima, Jorge Roberto Perrout de
    There is growing interest in identifying morphological, motor, maturation characteristics, as well as their changes, of children and adolescents in systematized training in various sports. Knowledge of these characteristics is important for coaches and researchers because they provide parameters for assessing youth development during training. For track and field, studies on the category under 16 are scarce. Thus, the objectives of this study are to describe the profile and to design a percentile table of morphological, motor, maturation and eventspecific variables of under 16 athletes. 105 young athletes were evaluated on two consecutive days. On the first day, an anamnesis of athletes and coaches was performed. Anthropometric and anaerobic measurements were analyzed in shot put, long jump, 800 m run. On the second day, flexibility, vertical impulse, upper limb strength, speed and maximal aerobic speed were evaluated. The biological maturation was evaluated by the percentage of the predicted adulte height. A table with percentiles was prepared with the data of all athletes. Another table with the results of the whole group plus mean and standard deviation was prepared. A last table was prepared containing data divided by group of sports events. The morphological variables presented differences between the groups as to body mass, BMI and sum of skinfolds. Significant differences were observed only for the motor variable MAS. No significant differences were observed only for long jump. When divided by groups, it was evident that throwers are different from the other athletes in some morphologic variables and in specific sports events.
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    Motivação de jovens e adultos para o treinamento do atletismo.
    (2016) Souza, Renato Siqueira de; Lima, Jorge Roberto Perrout de; Werneck, Francisco Zacaron; Bara Filho, Maurício Gattás; Freitas, Jefferson Verbena de
    O estudo investigou diferenças na motivação de atletas do atletismo, comparando grupos de provas, nível competitivo, categoria e sexo. Avaliamos a motivação através do questionário (SMS-BR28) de 133 atletas, 56% do sexo masculino e 44% do sexo feminino. Não teve diferenças significativas entre grupos de provas e nível competitivo, nível de significância (P<0,05). Houve diferença significativa comparando à motivação de juvenis e adultos vs pré-mirim e mirim. Concluímos que a motivação para treinar Atletismo independe da prova disputada, atletas juvenis, sub-23 e adultos são mais motivados intrinsecamente que os atletas pré-mirim e mirim, em relação ao sexo os homens tem maior motivação extrínseca que as mulheres.
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    Relação entre o excesso de peso e a coordenação motora de jovens atletas de atletismo.
    (2017) Freitas, Jefferson Verbena de; Castro, Phelipe Henrique Cardoso de; Rezende, Edson Campana; Werneck, Francisco Zacaron; Lima, Jorge Roberto Perrout de
    O objetivo deste estudo foi verificar a relac¸ão entre o índice de massa corporal (IMC) e a coordenac¸ão motora de jovens atletas de atletismo. Foram avaliados 24 jovens do sexo masculino (12,5 ± 0,6 anos) do Projeto Cria-UFJF. Os atletas foram classificados em dois grupos: eutróficos (IMC < 20,6; n = 20) e sobrepeso-obesidade (IMC ≥ 20,6; n = 4). A coordenac¸ão motora foi avaliada pelo teste KTK. Verificou-se correlac¸ão negativa e estatisticamente significativa entre o IMC e a coordenac¸ão motora (r = -0,69; p < 0,001). O grupo sobrepeso-obesidade apresentou menor desempenho no teste de coordenac¸ão motora comparado com o grupo eutrófico. Conclui-se que jovens atletas de atletismo com excesso de peso apresentam menor coordenac¸ão motora.