GSTM1 and cancer: Muscle [Hb]total significantly increased at 50W (125.5 ± 1.3 vs. 129.9 ± 1.9 μM; P = 0.04) and VT (138.9 ± 3.8 μM; P < 0.001) relative to baseline in controls, whereas [Hb]total only increased at VT in the cancer survivors (121.3 ± 2.0 vs. 129.5 ± 2.7; P = 0.002).