@Stefano-M64 I completely agree. My only guess as to why hiking doesn’t allow TSSr (and, therefore, cannot calculate VO2max) is that it can be assumed one might be carrying a large, weighted pack that would result in inaccurate measurements (higher HR for similar non-weighted paces)? But if we can edit our activities, we should at least be given the option to use TSSr if we so choose. Seems rather arbitrary to omit it all together.