Question: Mary is female, 51 years old, and weighs 49 kg. Mary completed 2 stages on the treadmill and achieved steady state HR during both stages. 1st stage: 3.0 mph, 2% incline, steady state HR = 115 bpm 2nd stage: 3.0 mph, 8% incline, steady state HR = 141 bpm Calculate her VO2max using the two stage slope method.