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Changes in muscle CD68+ cells (top) and CD68+CD163+ cells (bottom) in healthy elderly men (n = 25) over a 7-day time course following an acute bout of heavy resistance leg extension exercise. Data was analyzed using Friedman repeated measures analysis of variance on ranks and each timepoint was compared with baseline (–10 days) using Dunnett’s post hoc test. Individual values are displayed as cells/fiber (left) and cells/mm2 (right). *P < 0.05.
