Participant timeline Participants will be required to attend the biomechanics laboratory at York St John University on 3 occasions: a first "screening" visit for obtaining written informed consent, confirming eligibility and recording baseline characteristics of the participant, and two subsequent visits on which the study assessments will be conducted. The study assessment sessions (i.e. visits 2 and 3) will be identical in composition apart from that the participants will wear different shoes (unloading or control) during the walking tests. The first assessment visit must be completed within 4 weeks of the screening visit, and there will be a maximum of 2 weeks and a minimum of 1 day between assessment visits 1 and 2. After completing the crossover study, half of the participants (n=20) will be given the unloading shoes and the other half (n=20) the control shoes to wear for 2 weeks. After this 2-week period, all participants will complete and return a survey about the shoes and be questioned via telephone about any adverse device effects. A sub-sample (minimum n=12; control n=6, unloading n=6) will undertake a telephone-based semi-structured interview with a qualitative researcher. This interview will be conducted within 2 weeks of the end of the 2 week shoe-wearing period. Therefore, the maximum duration that a participant will be involved in the study from the point of consenting is 10 weeks, and the minimum is 17 days; however, most participants will most likely be undertaking the study visits across a period of 4-8 weeks.