race dynamics tracking

2021/05/21

Vision-based tracking is the most common tracking method for animal monitoring. Greyhound racing ideal trajectory path generation for straight to bend based on jerk rate minimization. Box 123, Broadway, NSW 2007, Australia; ua.ude.stu@niassoH.mamIDM (I.H. TRex, a fast multi-animal tracking system with markerless identification, and 2D estimation of posture and visual fields. IEEE transactions on pattern analysis and machine intelligence 35, 7 (2013), 1704--1716. We have chosen to use IsoLynx for our greyhound tracking purposes because it provides accurate real-time tracking without impeding the animals natural behaviours. This indicates a larger radius smooth path exit from the bend by the greyhounds. Most vision-based tracking systems for animals use a birds-eye view and are often fixed for indoor environments. https://dl.acm.org/doi/10.1145/3347318.3355518. All Rights Reserved. A real time player tracking system for broadcast tennis video. Hayati H., Eager D., Peham C., Qi Y. The maximum jerk level for the greyhound running path was just under 3.0 m/s3 for both the 525 m and 600 m race distance starts. Servers receive data on the race, including vehicles, driving patterns, weather, tire setups and more, which is then dynamically reapplied to the tracks surface in real-time. 1821 September 2019; pp.

BioTracker is an open source visual animal tracker that provides the most common core functionalities for animal tracking [30]. Races are conducted at purpose-built tracks and are run counter-clockwise. Pattern Anal. The average value of race parameters including greyhound speed, acceleration, path curvature and yaw rate was calculated by first finding the average in a race and then calculating the average of all races. Although the study was not conducted on actual players, it shows promise for alternative indoor tracking applications. Huang Y.C., Liao I.N., Chen C.H., k T.U., Peng W.C. TrackNet: A deep learning network for tracking high-speed and tiny objects in sports applications; Proceedings of the 2019 16th IEEE International Conference on Advanced Video and Signal Based Surveillance (AVSS); Taipei, Taiwan. It was clear to see that research into these systems has advanced over the last few years, as there has been a need from professional organisations, such as the Olympics, to use these systems in martial arts for automatic classification of strikes, impact analysis and automatic scoring. BATS: Adaptive ultra low power sensor network for animal tracking. Average speed of greyhounds versus race time and distance for the 525 m, 600 m and 725 m racing distance starts. 525 m and 725 m race distances, which start into the straight sections of the track, namely the home straight and the back straight, respectively. Yuan Q., Chen I.M. [(accessed on 8 May 2012)]. Eager D., Halkon B., Zhou S., Walker P., Covey K., Braiden S. Greyhound racing track lure systemsAcoustical measurements within and adjacent to the starting boxes. Lee E.S., Jeyakumar J.V., Balaji B., Wilson R.P., Srivastava M. AquaMote: Ultra low power sensor tag for animal localization and fine motion tracking; Proceedings of the 15th ACM Conference on Embedded Network Sensor Systems; Delft, The Netherlands. Forward-backward error: Automatic detection of tracking failures. Figure 2 shows the procedure adopted to calculate race parameter values from the IsoLynx data. Data Association for Multi-Object Visual Tracking.

A similar result was observed for the 600 m race distance starts. In 26th Symposium on Information Theory in the Benelux. Springer, Springer Berlin Heidelberg, Berlin, Heidelberg, 105--113. Our Track Technology: More than Meets the Eye. As the greyhounds ran around the track, they took specific paths to complete the race distance. 2012. Patel A., Stocks B., Fisher C., Nicolls F., Boje E. Tracking the Cheetah Tail Using Animal-Borne Cameras, GPS, and an IMU. Bao Dang, An Tran, Tien Dinh, and Thang Dinh. In Australasia, there are 59 greyhound racing tracks providing 199 different starts. Figure 10 shows the average curvature of greyhound running paths for both the 525 m and 600 m race distance starts. Tracking in-match movement demands using local positioning system in world-class mens ice hockey. The research of Huang et al. IsoLynx, Live Player Data and Location Maps. Furthermore, as the curvature is proportional to the radius of turn it was used for identifying the greyhound turning radius on the straight section of the track. 2006. Figure 14 shows the vector sum of average greyhound forward and centrifugal acceleration showing the overall average acceleration experienced by the greyhounds for the 525 m, 600 m and 725 m racing distance starts.

1Faculty of Engineering and Information Technology, University of Technology Sydney, P.O. Figure 12 depicts average forward acceleration of greyhounds for the 525 m, 600 m and 725 m racing distance starts. Licensee MDPI, Basel, Switzerland. Player tracking is commonly used in human sports to gain insight into location and dynamics. As evident from the greyhound trajectory plots, the average running path of the greyhounds approached a round path throughout the races where the curvature was greater than zero for the distance of the race. Challenges of ground truth evaluation of multi-target tracking. Mean Shift Analysis and Applications. The study obtained the x-y location of 6 months of races from a medium length (525 m) and two long length (600 m and 725 m) distances. Mandar Dixit and KS Venkatesh. The intended system is packaged in a sensor tag and attached to marine animals for wireless location sensing. Tracking animals underwater also has its challenges due to the limited number of compatible technologies. The following abbreviations are used in this manuscript: The authors contributed equally to this publication. 8600 Rockville Pike Learning to track at 100 fps with deep regression networks. Proprietary track building technology such as three-dimensional laser-scanning, dynamic track conditions and active weather effects underpin each track to create racing experience thats unlike any other. 1991.

Inertial sensors for performance analysis in combat sports: A systematic review. For instance, for the 525 m start, between 245 m and 300 m, greyhounds traversing through the track back straight averaged a perpendicular distance to the rail which peaked at just above 1.5 m. Likewise, for the 600 m start, between 375 m and 535 m, greyhounds traversing through the track home-turn bend averaged a perpendicular distance to the rail of around 0.5 m. Furthermore, from the plots, it was seen that for both the 525 m and 600 m distance races that with distance into the race greyhounds got closer to the track inside rail as the lower proximity-to-the-rail values indicate. This alert has been successfully added and will be sent to: You will be notified whenever a record that you have chosen has been cited. Exploration of rapid tetrapod running performance utilizing inertial measurement units; Proceedings of the 8th Adaptive Motion of Animals and Machines; Sapporo, Japan. (Right) three transponders (red circles) mounted along the back straight of a typical greyhound race track. The lighter colours in the plots indicate the turn sections of the track. International journal of computer vision 7, 1 (1991), 11--32. From the average forward acceleration plot, it can be seen that greyhounds accelerated rapidly out of the boxes reaching a maximum forward acceleration beyond 4.0 m/s2 at approximately 2 s after the race start. This gives us insight into their racing behaviours and allows us to pinpoint areas on the track that may be of high risk. This research was internally funded by the University of Technology Sydney. Player tracking data analytics as a tool for physical performance management in football: A case study from Chelsea Football Club Academy. The detection and tracking of the objects is a very challenging task in a crowded environment such as horse racing due to occlusion. 2005.

We use cookies to ensure that we give you the best experience on our website. Pyramidal implementation of the affine lucas kanade feature tracker description of the algorithm. IsoLynx transponder poles. TV content analysis: Techniques and applications. 18. It is there to improve your site experience by saving your preferences. The University of Technology Sydney (UTS) has been working closely with the Australasian greyhound industry for more than 5 years to reduce greyhound race-related injuries. Carving out a new line requires expert precision and recognition of the current track conditions. A systematic review of 36 papers presented in [41] highlights the key differences between inertial tracking systems for performance monitoring in combat sports. Learn more Mnck H.J., Jrg A., von Falkenhausen T., Tanke J., Wild B., Dormagen D., Piotrowski J., Winklmayr C., Bierbach D., Landgraf T. BioTracker: An open-source computer vision framework for visual animal tracking. This is feasible when the animals are restricted within an enclosed area. Making each lap around Daytona different than the next requires dynamic track conditions. The https:// ensures that you are connecting to the Graham Thomas. Thanks to the technology, traction can now lurk in the shadows. 2. The second bend (back turn) was located between the 274 m and 452 m, followed by the back straight, which ends at approximately 503 m from the start. However, it also faces the same limitations as the previous vision-based trackers. While processing the greyhound coordinate data obtained from the IsoLynx system, a small portion of data samples for some race starts deviated from the true values and were discarded and replaced with moving average values. Coyne M., Godley B. During this period, UTS has developed and deployed several different techniques including inertial measurement units, drones, high-frame-rate cameras, track geometric surveys, paw print analysis, track soil spring-force analysis, track maintenance data, race injury data, race computer simulation and modelling to assist in this task. Xingping Dong, Jianbing Shen, Dajiang Yu, Wenguan Wang, Jianhong Liu, and Hua Huang. Received 2021 Aug 10; Accepted 2021 Sep 9. John FA Taylor. West S.W., Williams S., Kemp S.C., Matthew J., Stokes K.A. It should be noted that the acceleration between zero and one second into the race could not be calculated as the data were deemed unusable. will also be available for a limited time. The research in [28] tracks the motion of a cheetah using a camera attached to the body and an IMU and GPS sensor suite. Color indexing. A negative average yaw rate was observed as the greyhounds came out from the boxes for the 525 m starts between 3.0 s and 4.8 s into the race indicating the clockwise direction of greyhound heading. This allows us to make our Facebook ads more targeted to our ideal audience. Similar tracking systems are also used for humans. Mohammad Hedayati, Michael J Cree, and Jonathan Scott. As can be seen from the plot for the 600 m starts, the period of initial high forward acceleration coincides with centrifugal acceleration making this distance the longest-lasting high acceleration distance start of all race distance starts. The data obtained were from a location tracking system known as IsoLynx [4]. Vol. It basically lets us know what kinds of customers are interested in iRacing before targeting these types of customers on the Facebook platform.

During the period where the UTS recommendations have been adopted, the injury rate has dropped significantly. The research in [42] uses a biomechanical sensor to coach new practitioners in Wushu techniques. Before Pattern recognition 43, 8 (2010), 2911--2926. https://doi. Learning to track and identify players from broadcast sports videos. In Equation (2), the greyhound stride period was determined by assuming a constant greyhound stride frequency of 3.54 Hz. In Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition Workshops. The neural network components assist with the problems of occlusion faced by many vision-based trackers by providing more intelligent insight through prediction models. Davoodi E., Khanteymoori A.R. 2026 June 2005; p. 149. 14. The greyhound forward race acceleration was calculated using the instantaneous speed values. The Bodley Head Ltd. Jungong Han, Dirk Farin, Peter H.N. 34, 7 (July 2012), 1409--1422. https://doi.org/10.1109/TPAMI.2011.239. This basically just lets us know you are interested in iRacing! Local positioning tracking systems have also recently been used to gain insight into player position and motion. The authors declare no conflict of interest. 2006. Springer Berlin Heidelberg, Berlin, Heidelberg, 563--579. 2013. greyhound racing track, IsoLynx tracking system, bio-loggers, clothoidal, Euler and Cornu spirals, velocity, acceleration, jerk, greyhound welfare, greyhound safety. Research on Wushu Actions and Techniques Based on a Biomechanical Sensor System. We found this was optimal for this scenario, since it did not impede the practitioners motion. Greyhound running path trajectory was analysed by looking into its dynamic effect on the greyhound and also compared to the track shape. 38, 4, Article 13 (Dec. 2006). However, fixed vision-based trackers are not so suitable for outdoor use. The resulting characteristics add another layer of strategy to the racing. Journal of Visual Communication and Image Representation 15, 3 (2004), 393--424. Surv. Their gait is the highly efficient rotary gallop, which is shared with the Cheetah [1]. This study investigated the application of location tracking data in the context of finding racing greyhound path dynamics. Occlusion-aware real-time object tracking. In Asian Conference on Intelligent Information and Database Systems. Throughout this period, UTS has used several different devices and methods for analyses including inertial measurement units (IMU) [9,10,11,12], drone-based tracking, high-frame-rate (HFR) video capture [13], track survey data [14], paw print analysis [15], track soil spring-force analysis [16,17,18], track maintenance data [19], race computer simulation and modelling [20], and greyhound injury data [21]. Jean-Yves Bouguet. 2010. 79 November 2018. In the video, the greyhound race track model was coloured according to different virtual track lanes to observe the veering of the greyhounds between the lanes. However, in the horse race, the jockeys follow each other's paths and move as a slowly changing group. 2016. The research in [38] used GPS to track Chelsea soccer players to analyse player dynamics. Inst. Object tracking benchmark. This study also verified that the maximum jerk levels greyhounds experienced while racing were lower than the jerk levels that had been predicted with simulations and modelling for the track path. The results showed that high-speed running in practice sessions was the leading contributing factor in managing future injuries among players. official website and that any information you provide is encrypted Pendrill A.M., Eager D. Velocity, acceleration, jerk, snap and vibration: Forces in our bodies during a roller coaster ride. This study investigated the use of a greyhound location tracing system where small and lightweight signal emitting devices were placed inside a pocket in the jackets of racing greyhounds. This showed that the influence of the first bend was more significant in the greyhound path following than the second bend. Keyboard Shortcuts: Replay / Camera Controls, Force Dynamics Dallara iRacing Grand Prix Championship, World of Outlaws CARQUEST Auto Parts Sprint Car Series, World of Outlaws ButtKicker Late Model Series. Hayati H., Walker P., Mahdavi F., Stephenson R., Brown T., Eager D. A comparative study of rapid quadrupedal sprinting and turning dynamics on different terrains and conditions: Racing greyhounds galloping dynamics; Proceedings of the ASME 2018 International Mechanical Engineering Congress and Exposition; Pittsburgh, PA, USA. Furthermore, the theoretical jerk level for the track path following was modelled for comparison with the greyhounds running path average, minimum and maximum jerk levels. Bonneau M., Vayssade J.A., Troupe W., Arquet R. Outdoor animal tracking combining neural network and time-lapse cameras. Clean race data gathered over a six-month period were analysed and presented for a typical 2-turn greyhound racing track.

Screen grab (https://bit.ly/3iDd6Sa (accessed on 21 July 2021)) of the 525 m start race data replay for a single race as the greyhounds pass the 725 m starting boxes and enter the home straight of the track.

This group dynamic gives an important cue to approximate the location of obscured jockeys. The average curvature value was highest in the bend sections of the track at just under 0.0197 1/m and lowest in the straight track sections at just under 0.004 1/m. Michael J Swain and Dana H Ballard. The curvature of greyhound running paths was calculated by finding the inverse of the radius of curvature of greyhound turns at different points in time from the race data by using the formula for the circumradius of a triangle. 915 November 2018. The corresponding lowest and highest values of average turning radii were 52.9 m and 51.3 m for 600 m distance starts, and the lowest and highest values of average curvature in the track bend were 0.0189 1/m and 0.0197 1/m, respectively. 2729 November 2017; p. 311. Interested in special offers, free giveaways, and news? Figure 15 and Figure 16 compare greyhound running path averages, minimum and maximum centrifugal acceleration jerk to theoretical track path jerk level for the 525 m and 600 m race distance starts at the track. Histograms of Oriented Gradients for Human Detection. This project aims to detect and track jockeys at the turning point of the horse races. 2010. Walter T., Couzin I.D. [. The Hidden Dimension: Man's Use of Space in Public and Private. 2016. 1114 July 2021. about navigating our updated article layout. Mahdavi F., Hossain I., Hayati H., Eager D., Kennedy P. Track shape, resulting dynamics and injury rates of greyhounds; Proceedings of the ASME International Mechanical Engineering Congress and Exposition; Pittsburgh, PA, USA. Sports TV applications of computer vision. Figure 13 depicts average centrifugal acceleration of greyhounds for the 525 m, 600 m and 725 m racing distance starts. And everything else under the sun has been factored in, too, down to the darkness of the blacktops influence on the surface-temperature of the track. There are three broad categories of track, namely: straight, 1-turn and 2-turn. De Silva V., Caine M., Skinner J., Dogan S., Kondoz A., Peter T., Axtell E., Birnie M., Smith B. Bridging the semantic gap in sports video retrieval and summarization. Recent Adv. In the last step as shown in Figure 2, if outliers were present in the calculated race dynamics data, and also where data points deviated from three standard deviations, a moving average filter was applied to the calculated data in the calculation process queue. 2327 July 2017. Object tracking using camshift algorithm and multiple quantized feature spaces. This has been achieved by animal welfare interventions that lower racing congestion, and lower transient forces and jerk rates the greyhounds experience during a race. (Left) transponder and CCTV mounted on the top of a pole for a typical greyhound race track. This shows that the greyhounds running path minimised the jerk level from the physical track path. Dynamic weather also changes the face of every track. Weina Ge and Robert T Collins. In European Conference on Computer Vision. This gave an overall picture of the race dynamics for a race distance. Jusufi A., Hayati H., Eager D., Tucker B. Robust visual tracking for multiple targets. In European conference on computer vision. It is especially intended to be compatible with low-cost hardware. We observed that a typical greyhounds racing speed rapidly increased to a maximum speed slightly below 19.5 m/s at between 80 m and 150 m into a race. Implementation of Smart Animal Tracking System Based on Artificial Intelligence Technique; Proceedings of the 2020 IEEE International Conference on Consumer Electronics-Taiwan (ICCE-Taiwan); Taoyuan, Taiwan. These cookies are used to provide a customized experience and can be used to provide targeted ads through advertising networks. From the race location coordinates and clock data, the instantaneous speed data of all greyhound starts were calculated. IEEE Computer Society, Washington, DC, USA, 1197--. The site is secure. The real-time location data are then transmitted to the server computer, where they are stored. IEEE Transactions on Pattern Analysis and Machine Intelligence 37, 9 (2015), 1834-- 1848. Concrete gets rubbered-in along the established racing lines and grooves. Scene structure analysis for sprint sports. org/10.1016/j.patcog.2010.03.009. Stride Length as a Speed Indicator in Fast Quadrupeds; Proceedings of the International Society of Biomechanics; Brisbane, Australia. The curvature profile of the greyhound in the first bend deviated more from the track path than the second bend when it is assumed both bends are exactly identical in design and shape. For this reason, some analyses like trajectory analysis for the 725 m race distance starts were omitted. arXiv preprint arXiv:1409.7618 (2014). Springer, Springer Berlin Heidelberg, Berlin, Heidelberg, 107--118. Intell. The research in [31] uses low-cost cameras fixed in an outdoor pasture in combination with a neural network algorithm to accurately track animals within a field of view. A moving average filter was used to correct data sample deviation from the true values. 2017. The work in [35] developed a batteryless beacon tracker for full-time tracking of sheep. Evol. The data are not publicly available due to restrictions within the research agreement. Portugal, MM '22: The 30th ACM International Conference on Multimedia, All Holdings within the ACM Digital Library. Average forward acceleration of greyhounds versus race time and distance for the 525 m, 600 m and 725 m racing distance starts. The IsoLynx system recorded the X and Y coordinates and clock time for each greyhound from the time they leave the starting boxes to the finish line. 2013. For 725 m distance starts, the first bend (home turn) commenced approximately 54 m from the start and ends at approximately 219 m. This was followed by home straight, which was located between approximately 219 m and 274 m from the start. Available online: Hossain M.I., Eager D., Walker P.D. Average yaw rate of the greyhounds running path versus race time and race distance for 525 m and 600 m race distance starts. We use analytics to determine how users use our website and look for opportunities within these datasets to improve our site design. This has been achieved by animal welfare interventions that lower racing congestion, and lower transient forces and jerk rates the greyhounds experience during a race. Using the data obtained, the greyhound kinematics such as speed and acceleration and path smoothness properties of the greyhound racing such as curvature and jerk were analysed. It depicts the eight greyhounds with their individually coloured jackets chasing the lure, which is shown as a small orange coloured oval. This made sure only the data sample which fell inside the true value sphere were taken into account for dynamics calculations. The application presented analyses the motion of a tennis ball under problematic image capture scenarios. In European conference on computer vision. 2327 July 2017. Animals : an Open Access Journal from MDPI, https://creativecommons.org/licenses/by/4.0/. and transmitted securely. The average greyhound racing speed profiles for the 525 m, 600 m and 725 m racing distance starts are presented in Figure 9. Accessibility Greyhound real-time location coordinates data was gathered for 6 months of race starts for each race distance at the track. MMSports '19: Proceedings Proceedings of the 2nd International Workshop on Multimedia Content Analysis in Sports. 915 November 2018; Hayati H., Eager D., Brown T., Jusufi A. The study in [43] used local position tracking on ice hockey athletes across five international games to determine differences in dynamics between forwards and defenders. Eng. Curvature data showed path smoothing properties of the greyhound running path for both the 525 m and 600 m racing distance starts. Katta and Murty. 2011. Wenhan Luo, Junliang Xing, Anton Milan, Xiaoqin Zhang, Wei Liu, Xiaowei Zhao, and Tae-Kyun Kim. 77--81 pages. By gaining a deeper understanding of greyhound motion and behaviour we may be able to further minimise the number of injuries in greyhound racing and support healthier lives for the greyhounds. Clark P.E., Johnson D.E., Kniep M.A., Jermann P., Huttash B., Wood A., Johnson M., McGillivan C., Titus K. An advanced, low-cost, GPS-based animal tracking system. Wang X., Zhi C., Wang Q. Wiley Publishing. The experimental result shows the effect of group dynamics on the tracking performance against partial and full occlusions. 1966. 2015. IEEE transactions on pattern analysis and machine intelligence 38, 10 (2016), 2096--2109. The highest average yaw rate was just under 0.35 rad/s, which occurred after entering the first bend at around 147 m and 225 m distances for the 525 m and 600 m distance race starts, respectively.

In Proceedings of the 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 1 - Volume 01 (CVPR '05). The greyhound heading yaw rate was found from the greyhound instantaneous speed and turning radius, where the average yaw rate of greyhound heading was calculated and indicated how quickly greyhounds were changing their direction on the track. The greyhound is an amazing animal having a maximum ground speed exceeding 20 m/s, making them twice as fast as the fastest human. ); ua.ude.stu@cahsI.solraK (K.I. Dynamic behaviour of high performance of sand surfaces used in the sports industry. Greyhounds gallop at speeds of almost 20 m/s and are known to change their heading direction to exceed a yaw rate of 0.4 rad/s. By taking the average of all instantaneous speed data the average greyhound speed profile was calculated. Localization and velocity tracking of human via 3 IMU sensors. The results showed that the centre forwards face the highest demand for high speed runs (HSR). The corresponding lowest and highest values of average turning radii were 52.9 m and 50.8 m. Average curvature of the greyhound running paths versus race time and race distance for 525 m and 600 m race distance starts. In 2016 International Conference on Image and Vision Computing New Zealand (IVCNZ). Hayati H., Eager D., Jusufi A., Brown T. A Novel Approach to Analyzing Rapid Tetrapod Locomotion Using Inertial Measurement Units; Proceedings of the International Society of Biomechanics; Brisbane, Australia. Gowda M., Dhekne A., Shen S., Choudhury R.R., Yang L., Golwalkar S., Essanian A. 1958. The authors would like to thank and acknowledge the support of Greyhound Racing Victoria for providing access to The Meadows greyhound track survey and access to IsoLynx data. It can be seen that in the straight sections of the track, the greyhound offset distance from the track inside boundary was significantly higher than in the bend sections where the greyhound perpendicular distance to the rail was just under 1 m. Average perpendicular distance of racing greyhounds from the track inside lure rail versus race time and race distance for both the 525 m and 600 m distances race starts. Alper Yilmaz, Omar Javed, and Mubarak Shah. It is evident that the average of the greyhound running paths differs from the track path where it approximates an oval shape with a high degree of path smoothness between the straights and the bends. 2325 October 2017; pp. Morgan & Claypool. In 2007 IEEE Conference on Computer Vision and Pattern Recognition. 12. de With, and Weilun Lao. Finally, for 525 m distance starts the lowest and highest values of average curvature in the track bend were 0.0189 1/m and 0.0195 1/m, respectively. M. Betke and Z. Wu. The final bend, which followed back straight ends at approximately 671 m, followed by the home straight to the finish line. We use this cookie to see what our users do after they click on an ad. Where the UTS recommendations have been adopted, the injury rate has dropped significantly. Duda N., Nowak T., Hartmann M., Schadhauser M., Cassens B., Wgemann P., Nabeel M., Ripperger S., Herbst S., Meyer-Wegener K., et al. Furthermore, jerk is a parameter used for describing the experienced force profile on the body. As evident from the greyhound trajectory plot, the average running path of the greyhounds approached a round path throughout the races where the curvature was greater than zero for the distance of the race. The University of Technology Sydney (UTS) has been working collaboratively with the Australasian greyhound industry to reduce the frequency and severity of injuries. The work in [32] tackles the field of view problem by implementing a freely moving camera for animal tracking.

For medium length race distances (525 m and 600 m) the greyhounds speed gradually reduced until the end of a race where it was approximately 16.1 m/s. The .gov means its official. Maximum, minimum and average jerk of greyhounds running paths versus race time and race distance for 525 m distance race starts with a black plot showing the jerk as predicted from the shape of the lure rail. 2004. The average centrifugal acceleration was highest for 600 m starts at approximately 6.2 m/s2, which occurred after entering the first bend at around the 205 m distance. 2013. The data show each of the eight greyhounds real-time time stamped location coordinates together with the location coordinates of the mechanical lure.