Exercise variability

[mtbc]

Far from the previous monotonicity, the variance in the cross-trainer's estimate of my calories burned keeps increasing, in line with how I feel about the workout at the time. Until I am into the workout I cannot tell how it will go. This morning I managed just 845 calories but on Thursday afternoon it was 890. I have been looking at factors like when I ate, time of day, etc., as predictors but so far no hypotheses are being borne out.