A alta frequência do treinamento de força não afeta a magnitude da hipertrofia e os ganhos de força muscular de indivíduos jovens não treinados
Fecha
2017-02-23Autor
Barcelos, Cintia Aparecida de Oliveira
Metadatos
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The training frequency is a resistance training variable (RT) that can be
manipulated to maximize strength and muscle mass gains. Evidence suggests that higher
volumes provide greater gains in strength and hypertrophy. Thus, it is possible that RT
performed at higher frequencies (e.g., 24h) would result in higher training volumes,
leading to adaptations when compared to RT performed less frequently. Objective: To
compare the effect of different weekly RT frequencies (5x vs. 3x vs. 2x per week), with
equalized and unbalanced VTT, on muscle hypertrophy in young men. As a secondary
objective, we compared the effects of these different RT frequencies with equalized and
unequalized VTT on muscle strength. Methods: The sample consisted of 19 male
subjects divided into three protocols: (RT5, RT3 and RT2 x / week). The RT protocol
consisted of three series of 80% 1-RM, between 9 and 12 maximal repetitions until the
concentric failure. The cross-sectional area (CSA) and muscle strength (1-RM) were
evaluated weekly for a period of 8 weeks. Results: Total equalized volume (RT5 / 4S =
23791 ± 6021, RT3 / 6S = 22531 ± 6087, RT2 / 8 = 20640 ± 3300), there was no
significant difference between the protocols (P> 0.05). At the end of 8 weeks of training,
the RT5 protocol showed the highest increase (RT5 = 54375 ± 12810 kg, RT3 = 30936 ±
8391 kg, RT2 = 20640 ± 3300 kg, P <0.0001). Regarding the progression of the VTT,
there was no difference between the RT5, RT3 and RT2 protocols when equalized (43%,
35% and 34%) and unequalized (57%, 43% and 34%) (P >0.05). All protocols
significantly increased the pre-post-training 1-RM values for the equalized VTT (RT5 =
26.00%, RT3 = 31.51%, RT2 = 33.54%) and equalized (RT5 = 43.32%, RT3 = 40.26%,
RT2 = 33.53%, main time effect, P <0.0001) There were no significant differences
between the protocols in any of the comparisons. In relation to VL CSA, all of them
increased from pre- to post-training with equalized VTT (RT5 = 9.85%, RT3 = 10.10%,
RT2 = 11.87%, main time effect, P <0.0001) and unbalanced (RT5 = 12.70%, RT3 =
11.75%, RT2 = 11.87%, main time effect, P <0.0001) There were no significant
differences between the protocols in both comparisons. Conclusion: A high frequency of
resistance training does not affect the magnitude of muscle hypertrophy and the strength
gains of untrained young individuals.