Abstract: Method implementing an accelerometer (17) for detecting asymmetries in a movement of a user, comprising: (a) fastening a device (1) on the torso of the runner, close to his/her center of gravity (CG), said device being electrically self-sufficient and comprising a triaxial accelerometer (17) and a digital processor (19); (b) using said accelerometer to measure a sequence of acceleration data in at least the vertical direction (av), while the user performs at least one exercise; and (c) during or at the end of said exercise, having said processor calculate the biomechanical parameters enabling the detection of at least one asymmetry in a movement of the user, on the basis of said acceleration data.

Abstract: A method and system for optimizing an athlete's performance during a race using a wearable device. The method involves determining the athlete's performance level from past races or trainings, and collecting race data through a wearable sensor. This data helps retrieve a tailored race profile from several options, each a non-linear function of time over distance, optimized for the athlete's level. The selected profile is applied to the sensor data to compute a projected race time, which is then displayed on the device. The system also measures and displays other race parameters such as stride length, cadence, and physiological metrics. It adjusts recommendations for pace in real-time based on these inputs. Advanced features include neural networks for enhancing race profile accuracy using data from multiple athletes. The device's processor and memory manage these functions effectively, providing dynamic feedback and strategic adjustments during the race, aiming to significantly improve athletic performance.

Abstract: A method for determining biomechanical parameters of the stride of a runner, using an accelerometer device on the wrist, on the upper arm, on the head or on the shoe, comprising the steps of measuring an initial sequence of acceleration data in at least the vertical direction using said accelerometer device; identifying in said initial sequence of acceleration data at least one frequency component caused by relative motion of the accelerometer device relative to the runner center of masse; attenuating said frequency component, so as to determine a modified sequence of acceleration data; determining said biomechanical parameters from said modified sequence of acceleration data.

Abstract: 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.