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Title: Molecular Adaptations to Concurrent Training
Authors: Souza, E. O. de
Tricoli, V.
Roschel, H.
Brum, P. C.
Bacurau, A. V. N.
Ferreira, J. C. B.
Aoki, M. S.
Neves-, M.
Aihara, A. Y.
Correa Fernandes, A. da Rocha [UNIFESP]
Ugrinowitsch, C.
Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Stanford Univ
Keywords: maximum dynamic strength
muscle hypertrophy
interval training
Issue Date: 1-Mar-2013
Publisher: Georg Thieme Verlag Kg
Citation: International Journal of Sports Medicine. Stuttgart: Georg Thieme Verlag Kg, v. 34, n. 3, p. 207-213, 2013.
Abstract: This study investigated the chronic effects of concurrent training (CT) on morphological and molecular adaptations. 37 men (age = 23.7 +/- 5.5 year) were divided into 4 groups: interval (IT), strength (ST) and concurrent (CT) training and a control group (C) and underwent 8 weeks of training. Maximum strength (1RM) and muscle cross-sectional area (CSA) were evaluated before and after training. Muscle samples were obtained before the training program and 48 h after the last training session. VO2max improved in 5 +/- 0.95 % and 15 +/- 1.3 % (pre- to post-test) in groups CT and IT, respectively, when compared to C. Time to exhaustion (TE) improved from pre- to post-test when compared to C (CT = 6.1 +/- 0.58 %; IT = 8.3 +/- 0.88 %; ST = 3.2 +/- 0.66 %). 1RM increased from pre-to post-test only in ST and CT groups (ST = 18.5 +/- 3.16 %; CT = 17.6 +/- 3.01 %). Similarly, ST and CT groups increased quadriceps CSA from pre-to post-test (6.2 +/- 1.4 %; 7.8 +/- 1.66 %). the p70S6K1 total protein content increased after CT. the ST group showed increased Akt phosphorylation at Ser473 (45.0 +/- 3.3 %) whereas AMPK phosphorylation at Thr172 increased only in IT group, (100 +/- 17.6 %). in summary, our data suggest that despite the differences in molecular adaptations between training regimens, CT did not blunt muscle strength and hypertrophy increments when compared with ST.
ISSN: 0172-4622
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