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A: Spearman correlation between baseline level of skeletal muscle NAMPT mRNA and %change in NAMPT mRNA with exercise training (n = 13, R2 = 0.31, P < 0.05). B: Spearman correlation between baseline level of skeletal muscle PGC-1α mRNA and %change in PGC-1α mRNA with exercise training (n = 13, R2 = 0.62, P = 0.002).
