Wednesday Threshold 1550m Swim Workout

Wednesday Threshold 1550m Swim Workout. A 1550m CSS / threshold session for race-pace fitness. Focus: threshold. Pool: 25 m. Total: 1550 m. About 31 minutes. Blocks: 300m Mixed Warmup 300 m zone: GA1. 4x50m Build 50 m rest 20s zone: WA. 6 rounds of: 150m @ Threshold 150 m zone: WA. 150m Easy Cooldown 150 m zone: ReKom. Open this workout in the free builder to customize reps, rest, zones, and export to PDF or Garmin. See every zone with the Swim Interval Calculator. Check pace and splits with the Swim Pace Calculator.