During winter here in MN, I do at least two endurance fat bike rides on weekends (weather permitting anythingh above 10F). These rides are anywhere from 2-4 hrs in length. My fat bike does not have a power meter, will HR TSS suffice if a training plan calls for weekend riding in power zones? I personally dont like to do endurance riding for roughly 3 hrs on Zwift/trainer.
Looking foward to starting my first fascat plan in a few weeks, 3 weeks of off season foundation muscle work to start preparing for 2021.