(Excerpted from “The Time-Crunched Cyclist, 2nd Ed.” by Chris Carmichael) You can find the CTS Field Test instructions and training zones calculator here. There are numerous methods for field testing, involving efforts of varying durations. The CTS Field Test consists of two 8-minute, all-out time trials separated by 10 minutes of easy spinning recovery. If … Continue reading CTS Field Test: Why Two 8-Minute Efforts Instead Of One 20-Minute Effort?