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Fold-changes in Toll-like receptor (TLR) expression 4 h following acute resistance exercise in human skeletal muscle (vastus lateralis) among young exercisers (YE), lifelong exercisers (LLE), and old healthy (OH). The dotted line represents the preexercise fold-change for each group, derived from the 2−ΔΔCT calculation (see methods). *P < 0.05 vs preexercise. **P < 0.05 main effect for exercise. §P ≤ 0.10 main effect for exercise.
