Science-based tools to help you train, fuel & race smarter.

Critical Power, Critical Speed, training zones, VO₂ intervals, CHO burn, swim pacing and more — 14 science-based calculators for bike, run and swim in one place.

Threshold-state driven training-block selection with lactate curve modeling and block simulation — see projected adaptation before you prescribe. Exports to PDF.

Dial in your exact pre-race carbohydrate targets by body weight and event type — then get a complete personalised meal plan you can download as a PDF.

Adjust your target running pace, power and heart rate for conditions warmer or more humid than you've acclimated to — so your session intensity stays true in the heat.