Method and apparatus for predicting a race time

A wearable device arranged for providing to an athlete during a race such as a running or a cycling race, at least one of:

• a race time prediction;
• a probability to achieve a target time at the end of the race;
• and/or an indication whether the pace followed by the athlete is too fast, adequate or too slow in order to achieve a target time,
• said apparatus comprising
• an inertial sensor and/or a positional sensor for measuring a plurality of intermediate times during said race;
• a processing unit arranged for retrieving, based on said intermediate time and on previous races of other athletes, a race profile as non-linear function of time over distance (t=f(d)), and for determining said information based on said race profile;
• a memory for storing a plurality of predefined race profiles;
• wherein the processing unit is also configured to select among said plurality of predefined race profiles the race profile that best corresponds to the race profile determined from said intermediate times;
• said plurality of predefined race profiles comprising:
• a first starter race profile wherein said non-linear function represents a more rapid pace during an initial section than during a last section of the race;
• and/or
• a second starter race profile wherein said non-linear function represents a more rapid pace during a last section than during an initial section of the race.