Method and apparatus for predicting a race time
A method for providing at least one of the following information to an athlete during a race such as a running or a cycling race: 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. The method includes measuring during the race a plurality of intermediate times with an inertial sensor and/or a positional sensor in a wearable device; causing a processing unit in the wearable device to retrieve, based on the intermediate time and on previous races of other athletes, a race profile as non-linear function of time over distance (t=f(d)); and using the retrieved race profile for determining the information.
1. A method 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 the target time,
said method comprising
measuring during said race a plurality of intermediate times or speeds with an inertial sensor and/or a positional sensor in a wearable device;
causing a processing unit in said wearable device to retrieve a race profile as a non-linear function of time over distance (t=f(d));
using the retrieved race profile for determining said information;
wherein said step of retrieving the race profile comprises selecting the race profile from among a plurality of standardized race profiles, said plurality of standardized 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.
2. The method of claim 1 , comprising:
said plurality of intermediate times being measured at predetermined distances determined with said inertial sensor and/or said positional sensor.
3. The method of claim 1 , wherein said retrieved race profile is an optimal race profile for the athlete.
4. The method of claim 1 , wherein said race profile is based on said intermediate times and on previous races of other athletes.
5. The method of claim 4 , wherein said race profile is determined by selecting among a plurality of standardized race profiles determined from previous races of other athletes the race profile that best corresponds to the race profile determined from said intermediate times.
6. The method of claim 1 , wherein the selection of the retrieved race profile depends on a target time indicated by the athlete for the race, and on deviations from this target at a plurality of intermediate positions.
7. The method of claim 1 , further comprising:
determining the level of said athlete from previous races or trainings of said athlete, or from information given by said athlete in said wearable device;
using said level for determining said race profile.
8. The method of claim 7 , said level corresponding to the VO2 max of said athlete.
9. The method of claim 1 , wherein said indication comprises an indication of a recommended pace range and a current pace.
10. The method of claim 1 , further comprising:
determining a current value of at least one race parameter, other than the pace;
displaying the current value of said race parameter along with a recommended range in order to achieve a recommended pace range.
11. The method of claim 1 , further comprising:
determining a current value of stride length and cadence;
displaying the current value of said stride length and of said cadence, along with a recommended range for those two parameters in order to achieve a recommended pace range.
12. The method of claim 1 , further comprising:
before said race, determining from said previous race a plurality of normalized race profiles, said race profile corresponding to a normalized non-linear function of time over distance (t=f(d)), said normalized function being determined from a group of athletes running over the same distance, multiplying each intermediate time of each athlete by an athlete-dependent factor so as to normalize the end race time or all athletes, and determining a normalized function or a series of normalized intermediate times matching the normalized intermediate times of said athletes in the group;
during said race, retrieving the closest normalized race profile followed by the athlete as said race profile.
13. The method of claim 1 , further comprising:
during said race, measuring a plurality of physiological parameters of said athlete;
using at least some of said parameters for selecting or adapting the retrieved race profile.
14. The method of claim 1 , in which: during said race, the athlete enters a comfort level;
using said entered comfort level for selecting or adapting the retrieved race profile.
15. The method of claim 1 , said step of retrieving a race profile comprising feeding a neuronal network or another self-learning structure with said intermediate times, and outputting said race profile and/or said information.
16. The method of claim 1 , wherein the actual intermediate times of said athlete are transmitted to a remote machine and used for computing new race profiles.
17. The method of claim 1 , at least some of said race profiles being dependent on a particular race.
18. The method of claim 1 , comprising a step of displaying a current speed or pace during the race, and an indication whether this speed or race is in a recommended range in order to achieve a target time.
19. A tangible computer product comprising software code portions executable by a processing unit in a wearable device for causing said wearable device to perform the steps of claim 1 .
20. 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.
21. The device of claim 20 , further comprising:
a memory for storing a plurality of predefined race profiles.
22. The device of claim 21 , said race profiles being normalized.
23. The device of claim 20 , wherein said indication comprises an indication of a recommended pace range and a current pace.