The Park-In-Shape trial was carried out by a Dutch research team lead by Prof Bas Bloem. The aim was to establish in a reliable and controlled manner whether aerobic exercise at home can improve symptoms in 130 people with Parkinson’s who had relatively mild symptoms and receiving usual medications. Ensuring that the groups had the same number of men and women, as well as medicated or as yet not medicated people, participants were assigned to either 1) aerobic exercise on a stationary home trainer with virtual reality software and videos that enhanced the experience by including gamified elements (aerobic intervention group), or 2) stretching (active control group). The exercise regimes consisted in 30–45 min training three times a week, over 6 months. Importantly, both groups of participants were given a motivational app as well as remote supervision. The instruction to the aerobic group was to get their heart rate up to a particular level, which increased as they became fitter. Neurological assessments using the Unified Parkinson’s Disease Rating Scale (UPDRS) were undertaken at the start and end of the study, by raters who were not aware what kind of exercise was undertaken by whom, and neither were participants aware that another exercise group was running in parallel.