Bars show mean adjusted for initial conditions (ANCOVA Test). (a) LPO: control 0.304 ± 0.023, Tai Chi 0.261 ± 0.02, and walking 0.331 ± 0.02 μmol/L, P = 0.08; (b) SOD: control 171 ± 2, Tai Chi 178 ± 2, and walking 177 ± 1 U/mL,*P < 0.05; (c) GPx: control 8087 ± 1113, Tai Chi 8712 ± 923, and walking 11430 ± 711 U/L, P = 0.07; (d) TAS: control 1.0 ± 0.035, Tai Chi 1.08 ± 0.029, and walking 0.99 ± 0.22 mmol/L, P > 0.05; (e) GAP: control 250 ± 46, Tai Chi 381 ± 37, and walking 258 ± 31 μmol/L, P < 0.05; (f) OxS-score: control 2.2 ± 0.18, Tai Chi 0.88 ± 0.15, and walking 1.2 ± 0.12, P < 0.001.