Fig. 1.

A: levels of 4-hydroxynonenal (4-HNE) were analyzed as an indicator of lipid peroxidation via Western blotting. A representative blot for 4-HNE protein conjugates is shown at top. Values are mean percent change ± SE and normalized to α-tubulin. §P < 0.05, mechanical ventilation (MV) significantly different from control (CON) and MV-exercise (EX). B: rates of hydrogen peroxide (H₂O₂) release from isolated mitochondria of diaphragm muscle. Values are means ± SE. §P < 0.05, MV significantly different from CON and MV-EX.