Qualitative data
Of the 62 participants who responded to the open- ended question ‘What do you think causes your cramps?’ 20 responded that they did not know. Eleven participants thought cramps could be due to the posi- tion in which they sleep and movements from this posi- tion (for example, ‘if I straighten my legs quickly’). One participant reported a cramp triggered by an event in a dream where they suddenly needed to run. Nine partici- pants thought that cramps could be due to poor circula- tion to the lower limbs. Five participants thought cramps could be due to unusually high levels of physical