Lact8

Lact8 helps athletes identify their lactate thresholds (LT1 and LT2) from step test data and calculate personalized training zones. Features: • Record lactate, heart rate, and power/pace from step tests • Automatic threshold detection using proven methods • Multiple zone systems (3-Zone, 7-Zone Touretski, 8-Zone Couzens) • Track threshold progression over time • Export data as CSV, JSON, or Markdown Perfect for cyclists, runners, and triathletes who want data-driven training zones based on their own physiology.