The subjects will be randomised into control or intervention group which will reduce selection bias. Only standardised objective outcome measures are being used which reduces the chances of the researcher influencing responses. As this is a small, educational study there is no funding and therefore the researcher will be randomising the participants, providing the exercises, and assessing the outcome measures. It is recognised that this is a potential source of bias as the researcher is not blind to group allocation, however, as this is a pilot study this is felt to be an acceptable weakness and will be recognised in write up. It is also a valuable educational experience for the student researcher to be involved in each part of the study.