Fig 5. Protein expression patterns related to anabolic signaling.

At baseline (PRE), 1 h following a heavy back squat resistance training session and treatment with EPC or sham (POST1) and 24 h following 3 consecutive days of heavy back squat resistance training session and treatment with EPC or sham and 2 additional, consecutive days of treatment with EPC or sham (POST2) protein expression patterns related to anabolic signaling were probed. Western blot analysis of protein concentrations in vastus lateralis biopsy samples are presented for A) insulin-like growth factor (IGF-1), B) phosphorylated 4E-binding protein 1 (p-4EBP1), and C) phosphorylated p-70 S6 kinase (p-p70s6k). Representative images and respective Ponceau images for all proteins are presented in Panel D. Protein expression data are expressed as fold-change from PRE levels (mean ± standard error) and effect sizes for change from PRE are presented as d ± 95% confidence interval. Effect sizes were calculated as mean change from PRE in the EPC group less mean change from PRE in the sham group divided by the pooled standard deviation for each respective time point. Repeated measures MANOVA was performed with PRE values as a covariate and an α ≤ 0.05 required for statistical significance. All statistics were performed using the absolute expression values. Main effects of time are presented as emphasized p-values. Post-hoc testing for a main effect of time was performed using Student’s paired t-tests and an α ≤ 0.025 was required for statistical significance.