The aim of this study was to compare 2 models of resistance training (RT) programs, nonperiodized (NP) training and daily nonlinear periodized (DNLP) training, on strength, power, and flexibility in untrained adolescents. Thirty-eight untrained male adolescents were randomly assigned to 1 of 3 groups: a control group, NP RT program, and DNLP program. The subjects were tested pretraining and after 4, 8, and 12 weeks for 1 repetition maximum (1RM) resistances in the bench press and 45° leg press, sit and reach test, countermovement vertical jump (CMVJ), and standing long jump (SLJ). Both training groups performed the same sequence of exercises 3 times a week for a total of 36 sessions. The NP RT consisted of 3 sets of 10-12RM throughout the training period. The DNLP training consisted of 3 sets using different training intensities for each of the 3 training sessions per week. The total volume of the training programs was not significantly different. Both the NP and DNLP groups exhibited a significant increase in the 1RM for the bench press and 45° leg press posttraining compared with that pretraining, but there were no significant differences between groups (p ≤ 0.05). The DNLP group's 1RM changes showed greater percentage improvements and effect sizes. Training intensity for the bench press and 45° leg press did not significantly change during the training. In the CMVJ and SLJ tests, NP and DNLP training showed no significant change. The DNLP group showed a significant increase in the sit and reach test after 8 and 12 weeks of training compared with pretraining; this did not occur with NP training. In summary, in untrained adolescents during a 12-week training period, a DNLP program can be used to elicit similar and possible superior maximal strength and flexibility gains compared with an NP multiset training model.
O objetivo do presente estudo foi verificar a validade do valor registrado para frequência cardíaca em repouso (FCr) registrada imediatamente antes de um teste de exercício máximo. Por conveniência, 23 universitárias (21,8±2,8 anos; 57,9±10,2 kg; 163,6±5,5 cm) saudáveis e com experiência prévia no teste fizeram parte da amostra. Todas realizaram duas visitas ao laboratório de forma aleatória, uma delas apenas para registrar a FCr (sessão controle -CON), e na outra visita, além da FCr, foi realizado um teste de exercício máximo (sessão experimental -EXP), em esteira rolante, sob o protocolo de Bruce. Aplicouse, então, o teste t de Student para dados pareados com nível de significância de p<0,05. Os resultados demonstraram diferenças significativas nos valores de FCr entre as sessões CON (68,2±7,5 bpm) e EXP (71,9±7,8 bpm) (p=0,003), com aumento médio de 4 bpm, variando entre -7 a 17 bpm. Com isso, podemos concluir que os valores de FCr sofrem alterações quando registrados pré-testes de exercício máximo em jovens universitárias.Palavras-chave: Frequência cardíaca; exercício; sistema nervoso autônomo. RESUMO ABSTRACT 34This study aimed to verify the validity of the value for resting heart rate (RHR) recorded immediately before a maximal exercise test. For convenience, 23 university women (21.8±2.8 years, 57.9±10.2 kg, 163.6±5.5 cm) healthy and with previous experience in this test were enrolled. All subjects performed randomly two visits to the laboratory, one only to record the RHR and another followed to a test of maximal effort, using the treadmill Bruce protocol. It was applied the Student t-test for paired data with significance level of p<0.05. The results showed significant differences in RHR values between the control day (68.2±7.5 bpm) and pretest day (71.9±7.8 bpm) (p=0.003) with an average increase of 4 bpm, ranging from -7 to 17 bpm. Then, we conclude that the values of RHR unchanged when recorded before a maximal exercise test in young university women students.
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