“It might sound strange but walking back and forth to the toilet is more difficult than running a marathon. However if you see my lactate levels of 8.0 mmol/l around the 5 minute mark, and 11.8 mmol/l around the 30 minutes mark, both produced by the same exercise, it means that the actual lactate production for this very trivial exercise is 19.8 mmol/l. That is a level that many professional athletes will never / not often reach and that sort of level of lactate makes it easy to understand why this trivial walk is so strenuous an exercise for me and more difficult than running a marathon. And it is therefore no wonder that I have severe loss of muscle power combined with severe muscle pain from this trivial walk to the toilet and back.” ExerciseChronic Fatigue SyndromeMyalgic EncephalomyelitisMe CfsMe Cfs QuotesGraded Exercise TherapyMuscle Weakness Author:Mark Vink