SST intervals are part of a continued effort to build and maintain base. Warm up in Endurance with 2 x 1 minute Fast Pedals (fast as you can pedal without bouncing in the saddle) to wake up your legs. Complete 2 x 17 minute intervals in the "Sweet Spot" zone with 5 minutes recovery in-between. Ride all other time in Endurance. Cadence: 85 - 105 rpm.