“For a long time, my ME was mostly quite mild, with unpredictable crashes and periods of good health. In 2015 I cycled around Sweden with my husband but in 2016 I went to Costa Rica and caught a gastric bug. I was very ill for three months which severely affected my ME.” After this Sarah stopped cycling for a while, “I didn’t ride my bike for ages – I really missed it,” nearly all physical activity became very exhausting, “I have three levels of fitness, walking, cycling and running. I can’t run at all anymore. On my worst days I couldn’t walk. When recovering, a short walk would mean having to lie down afterwards.”