Remember this is about the feasibility of a larger trial. Absolutely agree that the data from this trial will not have the statistical power to prove anything. Thanks for your thoughtsThis is an interesting proposal, but I note with caution that due to significant variations in daily activities, it can be difficult to separate the noise from the signal, unless they use long sampling times, or a large sample size. As such, the feasibility study will simply demonstrate that the data can be collected and that patients won't go on strike when subject to repeated testing!