The Fenland Measurement Reactivity trial is a sub-study of the Fenland study, and was set up to ascertain the level of validity of the conclusions drawn from studies of physical activity by estimating the size of any reactivity effect (i.e. the degree to which participants change their behaviour) believed to occur when study participants are asked to wear devices such as accelerometers or heart rate monitors.
The effect of self-monitoring of physical activity using pedometers has previously been well described. Even if devices do not provide feedback, it is possible that they may act as a prompt and hence be ‘reactive’ i.e. individuals may increase their activity while wearing them. Five hundred healthy Fenland study participants were randomised to two groups receiving different levels of information concerning the function and purpose of the Actiheart device.
Data collection complete, analysis in progress.
Unit led with responsibility for data.