I want to complete my goal event in 4 hours, but PowerBrain designates 5.5 hours. Why the discrepancy?

Event time goals are only an estimate, based on your type of event (Century, Cyclocross, etc). PowerBrain bases its load prediction on the type of event you're training for and, as such, the actual time that it takes for you to complete the event is of secondary consideration. Once you complete your event, PowerBrain will use the actual time of course to calculate loads, future workouts, etc.

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