When Newton disclosed preliminary findings from this trial (that were reported in The Times newspaper several years back), she reported that ME/CFS muscle tissue exhibited abnormal lactic acid accumulation in response to simulated exercise. That outcome was consistent with the findings of her MRI study.
As far as I can see, this paper doesn't disclose what happened to lactic acid levels.
Can anyone explain? Have I missed something? Is this to be reported in a separate paper? Or might this omission suggest that they tested this, and didn't find abnormal lactic acid accumulation?
They didn't report lactate levels in this paper but they did measure lactate dehydrogenase (the enzyme that converts pyruvate to lactate and vice versa) and the levels were normal.