EP1586353A1 - Procédé et dispositif de mesure de l'efficacité d'un geste sportif - Google Patents
Procédé et dispositif de mesure de l'efficacité d'un geste sportif Download PDFInfo
- Publication number
- EP1586353A1 EP1586353A1 EP04405233A EP04405233A EP1586353A1 EP 1586353 A1 EP1586353 A1 EP 1586353A1 EP 04405233 A EP04405233 A EP 04405233A EP 04405233 A EP04405233 A EP 04405233A EP 1586353 A1 EP1586353 A1 EP 1586353A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- attribute
- heart rate
- reference population
- athlete
- accelerometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
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- 230000033001 locomotion Effects 0.000 claims description 11
- 230000011664 signaling Effects 0.000 claims description 10
- 230000000875 corresponding effect Effects 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 5
- 230000002596 correlated effect Effects 0.000 claims description 2
- 230000000747 cardiac effect Effects 0.000 abstract description 2
- 230000005484 gravity Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000010606 normalization Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 210000000038 chest Anatomy 0.000 description 3
- 210000002683 foot Anatomy 0.000 description 3
- 210000003423 ankle Anatomy 0.000 description 2
- 230000000386 athletic effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 239000000556 agonist Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 238000009532 heart rate measurement Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- CMWTZPSULFXXJA-VIFPVBQESA-N naproxen Chemical compound C1=C([C@H](C)C(O)=O)C=CC2=CC(OC)=CC=C21 CMWTZPSULFXXJA-VIFPVBQESA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- 230000037081 physical activity Effects 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/0028—Training appliances or apparatus for special sports for running, jogging or speed-walking
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B69/00—Training appliances or apparatus for special sports
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2220/00—Measuring of physical parameters relating to sporting activity
- A63B2220/40—Acceleration
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2230/00—Measuring physiological parameters of the user
- A63B2230/04—Measuring physiological parameters of the user heartbeat characteristics, e.g. ECG, blood pressure modulations
- A63B2230/06—Measuring physiological parameters of the user heartbeat characteristics, e.g. ECG, blood pressure modulations heartbeat rate only
Definitions
- the invention relates to the field of physical activities. It relates to, more particularly, a method and a device for measuring the efficiency of a sporting gesture.
- the training aims to improve its efficiency, or efficiency, which can be defined by the ratio of energy expended to energy cost by the movement and / or movement of the athlete.
- Improving efficiency also means reducing the denominator the report "energy spent / energy cost”.
- the problem lies essentially on material aspects of the athlete's equipment.
- the energy cost of the movement requires an improvement in technical mastery of the gesture in question. Its effectiveness is directly related to difficult to quantify parameters (support orientation, relaxation of antagonistic muscles in the working phases and agonist muscles in the rest phases, parasitic movements ).
- the present invention aims to enable an athlete to evaluate the effectiveness of his technique, without needing an outside look.
- the invention provides also, especially for coaches, a rational way to quantify the technical progress of the athlete.
- the attribute A is the standard deviation of the signal supplied by the accelerometer.
- the stride is modeled through the center of gravity of the runner, who has sinusoidal motion.
- the effectiveness of the stride translates into a constant speed and a minimized acceleration of the center of gravity, in a vertical direction.
- the athlete is equipped with a device the invention, comprising a device for measuring the heart rate or heart rate monitor 10 of type known as, for example, that marketed by the firm Polar®.
- the measurement is done through a probe incorporated in a chest strap 12 disposed on the thorax of the athletic. It transmits a signal received by a wristwatch 13 equipped for the process and display the instantaneous heart rate, including in the form a percentage of the athlete's maximum heart rate.
- the device according to the invention further comprises an accelerometer 14 in solidarity with the runner's chest. It is, for example, attached to the belt 12 of the Heart.
- the sensor used is of the ADXL type 202E marketed by the firm Analog Devices and provides a signal representative of the acceleration that the rider's center of gravity undergoes in the three directions of space.
- a processing circuit 15 receives the signal from the accelerometer 14 conveyed by transmission means, consisting of a transmitter 16a and a receiver 17, respectively associated with the accelerometer 14 and the processing circuit 15. To avoid any disturbance caused by background noise or artefact, the signal is corrected by a band pass type filter 18 before to arrive at the processing circuit 15. The latter also receives a transmitter 16b information from the heart rate monitor 10 relating to the frequency heart rate and at maximum heart rate percentage.
- Circuit 15 processes this information so as to evaluate the effectiveness of the gesture the athlete, as will be described below.
- the processing circuit 15 is housed in the watch 13 and the transmission means 16 and 17 are wireless.
- the transmission frequencies of the signals of the heart rate sensor 10 and the accelerometer 14 are protected from each other to avoid any disturbance.
- the device still comprises, placed at the output of the processing circuit 15, signaling means 19 to inform the athlete about the effectiveness of His gesture.
- the signaling can be sound and the means 19 are then consisting of a loudspeaker also housed in the watch 13.
- the attribute A extracted at 22 is the standard deviation of the acceleration signal of the torso delivered by the accelerometer 14. Every 5 seconds, this standard deviation is estimated on the basis of the measurements made during the last 10 seconds.
- the normalization 23 of the attribute A is necessary for the subsequent comparison. Since the frequency of the stride has a direct impact on the acceleration experienced by the torso of the runner, this normalization is performed with respect to this frequency, directly extracted from the signal supplied by the accelerometer 14, advantageously by the zero crossing method of the signal. Indeed, according to the sinusoidal modeling of the displacement of the center of gravity of the runner, there are two passages by zero of the signal in each of the periods.
- the reference value used for the comparison operation 24, contained in the memory 21, is the average AT of the attribute, obtained for a reference population.
- the effectiveness of the stride is not the same during a simple jog or competition. It is therefore necessary to compare the attributes of the subject and the reference runners at a similar intensity of effort.
- the average AT of the attribute is stored in the memory, at the factory, for different values of a stress parameter P i , which is a percentage of the maximum heart rate.
- the attributes of the reference population are obtained by running its limbs at stable threshold intensities, typically 60%, 70%, 80%, 85% of their maximum heart rate. These percentages, given as an example, correspond to an audience of endurance runners.
- the microprocessor 20 searches the memory 21 for the reference value AT corresponding to the percentage of the maximum heart rate indicated by the heart rate monitor 10. This value is either directly extracted from the memory if the percentage corresponds to a threshold intensity, or calculated by interpolation if the percentage is between two values of the parameter P i .
- the comparison between the measured attribute A and its mean reference value AT is advantageously carried out, typically every five seconds, by means of the Mahalanobis formula. This allows, in the case where several attributes are taken into account in the comparison, to weight the calculation by the influence of each attribute according to its reliability. To do this, it involves a standardization by the covariance matrix of the average attributes of the reference population.
- the difference d from the comparison 24 is an index of the effectiveness of the stride. It is transcribed at 25 by the signaling means 19. A correlation scale is stored for this purpose in the memory 21 to make the calculated index significant by associating it with a frequency of an intermittent sound signal. Thus, for example, the larger the difference calculated using the Mahalanobis formula, the higher the frequency of the signal.
- the index can also be displayed digitally on the screen of the watch 13.
- the runners constituting the reference population were chosen according to their performances and the quality of their stride, judged by experts in the discipline according to traditional criteria. A runner having a little academic style will not be taken into account in this sampling, so as not to distort the reference values.
- the device can also be adapted to other sports than running. modifying the position of the accelerometer.
- modifying the position of the accelerometer In particular, in cycling, it is interesting to analyze the pedaling by having a sensor on the foot or on the biker's ankle.
- gymnasts may also have recourse to a apparatus according to the invention to study their rotation during acrobatics. In this case, the use of a heart rate monitor and the taking into account of the intensity of the effort to make the comparison is not mandatory.
- the heart rate monitor implemented in the device can also operate on the basis of any other measurement system, such as for example, an optical measurement described in EP 1 297 784 A1.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
Description
- extraction d'au moins un attribut A du signal fourni par un accéléromètre placé sur le sportif de manière à capter l'accélération liée à ce geste,
- comparaison de cet attribut avec la valeur moyenne
A du même attribut, obtenue pour une population de référence et stockée dans une mémoire, et - production d'une représentation de l'efficacité du geste.
- l'attribut A, et
- sa valeur moyenne
A , obtenue pour une population de référence, correspondant au pourcentage de la fréquence cardiaque maximale fourni par un cardiofréquencemètre porté par le sportif.
- un accéléromètre placé sur un sportif de manière à fournir un signal représentatif de ce geste,
- un circuit de traitement doté d'un microprocesseur et d'une mémoire,
recevant le signal, le microprocesseur étant programmé pour
effectuer, à intervalles déterminés, les opérations suivantes :
- extraction d'au moins un attribut A du signal de l'accéléromètre,
- comparaison de l'attribut A avec la valeur moyenne
A du même attribut, obtenue pour une population de référence et stockée dans ladite mémoire, et - production d'une représentation de l'efficacité du geste, et
- des moyens de signalisation pour transmettre au sportif cette représentation.
- l'attribut A , et
- sa valeur moyenne
A , obtenue pour une population de référence, correspondant au pourcentage de la fréquence cardiaque maximale fourni par un cardiofréquencemètre porté par le sportif.
- d (ƒc) est l'écart entre le coureur et la population de référence pour un pourcentage donné ƒc de la fréquence cardiaque maximale,
- ρ / est la valeur de l'attribut déterminé pour le coureur ou, dans le cas général, un vecteur dont les composantes sont les différents attributs mesurés pour ce dernier,
- ρ / µ reƒ est la moyenne de l'attribut déterminé pour la population de référence ou, dans le cas général, le vecteur dont les composantes sont les valeurs moyennes des attributs pour ladite population de référence,
- C ƒc est la matrice de covariance des valeurs moyennes des attributs de la population de référence, et
- T indique que la matrice correspondante est transposée.
- le circuit de traitement et les moyens de signalisation sont logés dans une montre portée par le sportif,
- les moyens de signalisation sont sonores et sont agencés de manière à produire un son intermittent dont la fréquence est corrélée à la représentation de l'efficacité du geste.
- les figures 1a et 1 b sont des représentations schématiques du dispositif selon l'invention ; et
- la figure 2 illustre la méthode de traitement de données utilisée dans un tel dispositif.
- se tenir pratiquement perpendiculaire au sol ;
- axer ses mouvements dans la direction du déplacement ;
- choisir un angle d'atterrissage approprié pour que l'énergie de l'appui soit recyclée au maximum ;
- avoir une fréquence de foulée élevée ;
- coordonner les mouvements de ses bras et de ses jambes ;
- conserver ses hanches en ligne avec ses épaules et sa tête ; et
- avoir un pivotement rapide de la cheville après la pose du pied de manière à avoir une meilleure poussée.
- en 22, extraction d'au moins un attribut A du signal de l'accéléromètre 14,
- en 23, normalisation de l'attribut afin de s'affranchir de l'influence de la variabilité inter-sujets,
- en 24, comparaison de l'attribut normalisé A avec une valeur de
référence
A stockée dans la mémoire 21 et correspondant à la mesure de fréquence cardiaque délivrée par le cardiofréquencemètre 10, et - en 25, fourniture aux moyens de signalisation 19 d'une représentation de l'efficacité du geste.
- dans laquelle: d (ƒc) est l'écart entre le coureur et la population de référence pour un pourcentage donné ƒc de la fréquence cardiaque maximale,
- ρ / est la valeur de l'attribut déterminé pour le coureur ou, dans le cas général, le vecteur dont les composantes sont les différents attributs mesurés,
- ρ / µ reƒ est la moyenne de l'attribut déterminé pour la population de référence ou, dans le cas général, le vecteur dont les composantes sont les valeurs moyennes des attributs pour ladite population de référence,
- C ƒc est la matrice de covariance des valeurs moyennes des attributs de la population de référence,
- T indique que la matrice correspondante est transposée.
Claims (10)
- Procédé de mesure de l'efficacité du geste d'un sportif, caractérisé en ce qu'il comprend les étapes suivantes :extraction (22) d'au moins un attribut (A) du signal fourni par un accéléromètre (14) placé sur le sportif de manière à capter l'accélération liée à ce geste,comparaison (24) de cet attribut avec la valeur moyenne (
A ) du même attribut, obtenue pour une population de référence et stockée dans une mémoire (21), etproduction (25) d'une représentation de l'efficacité du geste. - Procédé selon la revendication 1, caractérisé en ce que la comparaison (24) s'effectue entre :ledit attribut (A), etsa valeur moyenne (
A ), obtenue pour une population de référence, correspondant au pourcentage de la fréquence cardiaque maximale fourni par un cardiofréquencemètre (10) porté par le sportif. - Procédé selon l'une des revendications 1 et 2, caractérisé en ce que l'attribut (A) est l'écart-type du signal fourni par l'accéléromètre (14).
- Procédé selon la revendication 3 destiné à mesurer l'efficacité de la foulée d'un coureur à pied, caractérisé en ce que l'attribut est normalisé par la fréquence de la foulée (23).
- Dispositif pour la mesure de l'efficacité d'un geste sportif, caractérisé en ce qu'il comprend :un accéléromètre (14) placé sur un sportif de manière à fournir un signal représentatif dudit geste,un circuit de traitement (15) doté d'un microprocesseur (20) et d'une mémoire (21), recevant ledit signal, ledit microprocesseur (20) étant programmé pour effectuer, à intervalles déterminés, les opérations suivantes :extraction (22) d'au moins un attribut (A) du signal de l'accéléromètre,comparaison (24) dudit attribut (A) avec la valeur moyenne (
A ) du même attribut, obtenue pour une population de référence et stockée dans ladite mémoire (21), etproduction (25) d'une repésentation de l'efficacité du geste, etdes moyens de signalisation (19) pour transmettre au sportif ladite représentation. - Dispositif selon la revendication 5, caractérisé en ce qu'il comporte, en outre, un appareil de mesure de la fréquence cardiaque (10) destiné à fournir au circuit de traitement (15) des informations relatives à la fréquence cardiaque du sportif, et en ce que ledit circuit de traitement (15) est programmé pour effectuer ladite opération de comparaison entre :ledit attribut (A), etsa valeur moyenne (
A ), obtenue pour une population de référence, correspondant au pourcentage de la fréquence cardiaque maximale fourni par un cardiofréquencemètre (10) porté par le sportif. - Dispositif selon l'une des revendications 5 et 6, caractérisé en ce que leditcircuit de traitement est programmé pour effectuer ladite comparaison selon l'équation : dans laquelle :d (fc) est l'écart entre le coureur et la population de référence pour un pourcentage donné ƒc de la fréquence cardiaque maximale,ρ / est la valeur dudit attribut déterminé pour le coureur ou, dans le cas général, un vecteur dont les composantes sont les différents attributs mesurés pour ce dernier,ρ / µ reƒ est la moyenne de l'attribut déterminé pour la population de référence ou, dans le cas général, le vecteur dont les composantes sont les valeurs moyennes des attributs pour ladite population de référence,C ƒc est la matrice de covariance des valeurs moyennes des attributs de la population de référence, et
- Dispositif selon l'une des revendications 5 à 7, caractérisé en ce que ledit circuit de traitement (15) est logé dans une montre (13) portée par le sportif.
- Dispositif selon l'une des revendications 5 à 8, caractérisé en ce que lesdits moyens de signalisation (19) sont logés dans ladite montre (13).
- Dispositif selon l'une des revendications 5 à 9, caractérisé en ce que lesdits moyens de signalisation (19) sont sonores et en ce qu'ils sont agencés de manière à produire un son intermittent dont la fréquence est corrélée à ladite représentation.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200460004243 DE602004004243D1 (de) | 2004-04-15 | 2004-04-15 | Verfahren und Vorrichtung zur Messung der Wirksamkeit einer Sportbewegung |
EP20040405233 EP1586353B1 (fr) | 2004-04-15 | 2004-04-15 | Procédé et dispositif de mesure de l'efficacité d'un geste sportif |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20040405233 EP1586353B1 (fr) | 2004-04-15 | 2004-04-15 | Procédé et dispositif de mesure de l'efficacité d'un geste sportif |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1586353A1 true EP1586353A1 (fr) | 2005-10-19 |
EP1586353B1 EP1586353B1 (fr) | 2007-01-10 |
Family
ID=34932059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20040405233 Expired - Lifetime EP1586353B1 (fr) | 2004-04-15 | 2004-04-15 | Procédé et dispositif de mesure de l'efficacité d'un geste sportif |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1586353B1 (fr) |
DE (1) | DE602004004243D1 (fr) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1754521A1 (fr) | 2005-08-16 | 2007-02-21 | CSEM Centre Suisse d'Electronique et de Microtechnique SA Recherche et Développement | Procédé et dispositif de determination de l'efficacité de la foulée d'un coureur |
EP1764583A2 (fr) * | 2005-09-16 | 2007-03-21 | IDT Communication Technology Limited | Systeme et methode de mesure des parameters de demarche |
EP2229880A1 (fr) | 2009-03-18 | 2010-09-22 | CSEM Centre Suisse d'Electronique et de Microtechnique SA | Unité de surveillance intégrée dans un bandeau utilisant un accéléromètre |
US9629558B2 (en) | 2010-09-30 | 2017-04-25 | Fitbit, Inc. | Portable monitoring devices and methods of operating same |
US9662053B2 (en) | 2012-06-22 | 2017-05-30 | Fitbit, Inc. | Physiological data collection |
US9775548B2 (en) | 2015-05-28 | 2017-10-03 | Fitbit, Inc. | Heart rate sensor with high-aspect-ratio photodetector element |
US10178973B2 (en) | 2012-06-22 | 2019-01-15 | Fitbit, Inc. | Wearable heart rate monitor |
US10216893B2 (en) | 2010-09-30 | 2019-02-26 | Fitbit, Inc. | Multimode sensor devices |
US10433739B2 (en) | 2016-04-29 | 2019-10-08 | Fitbit, Inc. | Multi-channel photoplethysmography sensor |
US10512407B2 (en) | 2013-06-24 | 2019-12-24 | Fitbit, Inc. | Heart rate data collection |
US10568525B1 (en) | 2015-12-14 | 2020-02-25 | Fitbit, Inc. | Multi-wavelength pulse oximetry |
US11051706B1 (en) | 2017-04-07 | 2021-07-06 | Fitbit, Inc. | Multiple source-detector pair photoplethysmography (PPG) sensor |
US11096601B2 (en) | 2012-06-22 | 2021-08-24 | Fitbit, Inc. | Optical device for determining pulse rate |
US11206989B2 (en) | 2015-12-10 | 2021-12-28 | Fitbit, Inc. | Light field management in an optical biological parameter sensor |
US11259707B2 (en) | 2013-01-15 | 2022-03-01 | Fitbit, Inc. | Methods, systems and devices for measuring heart rate |
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-
2004
- 2004-04-15 DE DE200460004243 patent/DE602004004243D1/de not_active Expired - Lifetime
- 2004-04-15 EP EP20040405233 patent/EP1586353B1/fr not_active Expired - Lifetime
Patent Citations (11)
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US4409992A (en) * | 1980-10-16 | 1983-10-18 | Sidorenko Georgy I | Electronic ergometer |
DE4141109A1 (de) * | 1991-12-13 | 1993-06-17 | Daum Electronic Gmbh | Vorrichtung und verfahren zum trainieren und zur ermittlung des trainingsfortschritts einer person |
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Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1754521A1 (fr) | 2005-08-16 | 2007-02-21 | CSEM Centre Suisse d'Electronique et de Microtechnique SA Recherche et Développement | Procédé et dispositif de determination de l'efficacité de la foulée d'un coureur |
EP1764583A2 (fr) * | 2005-09-16 | 2007-03-21 | IDT Communication Technology Limited | Systeme et methode de mesure des parameters de demarche |
EP1764583A3 (fr) * | 2005-09-16 | 2007-05-30 | IDT Technology Limited | Systeme et methode de mesure des parameters de demarche |
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Publication number | Publication date |
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DE602004004243D1 (de) | 2007-02-22 |
EP1586353B1 (fr) | 2007-01-10 |
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