Turn your training plan into a power-based plan.

Five steps to calibrate any standard plan to you — one test, five zones, and watts that don't lie on hills, in wind or in heat. For runners chasing a number, not a first finish line.

• The Critical Power test — one 40-minute session and a simple formula that anchor every zone and target to your current fitness
• Zones and race-pace conversions — turn "8 × 400m at 5km pace" into watts you can hold on any course, in any conditions
• Four rules to build your week — where the hard sessions, the long run and the easy days go, with the exact power caps for each

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