Abstract: Systems and methods are described for providing asynchronous race functionality and simulation for users of exercise equipment. In some aspects fitness performance data may be obtained, corresponding to performance of a race course by a user using exercise equipment, where the fitness performance data is sampled at a sample rate selected based on a type of the exercise equipment. The fitness data may then be modified and used to simulate the user performing the race course by providing the movement data to and concurrently with a second user performing the race course using second exercise equipment.

Abstract: Systems and methods are described for personalizing a fitness or workout plan based on an athletes past performance. In some aspects, performance metrics from at least two workout sessions performed by a user using exercise equipment, may be obtained, where each workout session includes a plurality of intervals corresponding to one of a number of different intensity levels. The performance metrics over a subset of the intervals may be compared with a prescribed performance of the corresponding interval to generate interval comparisons. Using the interval comparisons, at least one of a length or an intensity level of at least one interval of a future workout session may be modified.