A roller assembly for smoothing an expanse of granular media such as golf bunker sand, snow, horse race track dirt, or other media. The assembly has one or more rollers having a longitudinal axis. Each roller includes wires spaced from the axis to define a roller surface. Each wire is resiliently flexible to distort inwardly in response to force of contact on, and to recover during release of force from, the granular media as the roller rotates about the axis on the granular media. A shaft extends along the axis of the roller assembly between the arms of a yoke with a handle extending therefrom. As the roller surface traverses the media, at least some of the media is flung outwardly of the roller, smoothing the expanse. The roller assembly may be manually operated or may be towed behind a towing apparatus.

A roller assembly for smoothing an expanse of granular media such as golf bunker sand, snow, horse race track dirt, or other media. The assembly has one or more rollers having a longitudinal axis. Each roller includes wires spaced from the axis to define a roller surface. Each wire is resiliently flexible to distort inwardly in response to force of contact on, and to recover during release of force from, the granular media as the roller rotates about the axis on the granular media. A shaft extends along the axis of the roller assembly between the arms of a yoke with a handle extending therefrom. As the roller surface traverses the media, at least some of the media is flung outwardly of the roller, smoothing the expanse. The roller assembly may be manually operated or may be towed behind a towing apparatus.

The invention comprises systems and devices for calculating and displaying real-time race information to a racer during a race. A portable race device may be worn by a racer. During the race, while within range of a race gate transmission, the race device receives gate crossing times for other race participants, and may calculate and display the current positions and times for a selected race group, and the pace needed for the racer to win, and also may display the projected finish positions and times for a selected race group, and the pace needed for the racer to win.

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.

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.

An adjustable vault apparatus for use on a ground surface includes a base and a pair of linear actuators mounted vertically at opposing sides thereof. Each linear actuator is adapted to move a bar support thereof vertically between a lowered position and a raised position. The bar supports are mutually opposing and adapted to support one end of an elongated jump bar at a bar trough thereof, by gravity. Each linear actuator moves the bar support in accordance to a control circuit electrically connected with each linear actuator and a power source. A control signal received by the control circuit, either wirelessly or by wired connection, causes the control circuit to actuate each linear actuator to either raise or lower each bar support in unison, and the jump bar.

A hurdle has a supporting frame and two crossing rods. The two crossing rod each respectively employing a connecting joint, a spring, an engaging member, and a locking screw engageable with two opposing standing bars. The supporting frame includes the two standing bars and a horizontal aperture. The crossing rod has a hollow rod body, a soft protector jacketed onto the rod body, and a secure aperture disposed through an end of crossing rod. The connecting joint includes a hollow tubal structure with an axial hole, a connecting section with a smaller diameter is disposed at an end, a combining aperture disposed on the connecting section. An end of the spring is a hook end and another end is a screw stem having a threaded section and an inner threaded aperture, and the hook end of the spring is placed into the connecting joint through the axial hole.

A hurdle has a supporting frame and two crossing rods. The two crossing rod each respectively employing a connecting joint, a spring, an engaging member, and a locking screw engageable with two opposing standing bars. The supporting frame includes the two standing bars and a horizontal aperture. The crossing rod has a hollow rod body, a soft protector jacketed onto the rod body, and a secure aperture disposed through an end of crossing rod. The connecting joint includes a hollow tubal structure with an axial hole, a connecting section with a smaller diameter is disposed at an end, a combining aperture disposed on the connecting section. An end of the spring is a hook end and another end is a screw stem having a threaded section and an inner threaded aperture, and the hook end of the spring is placed into the connecting joint through the axial hole.

A system and method for predicting and optimizing an athlete's race performance using a wearable device is disclosed. The method involves measuring intermediate times at predetermined distances utilizing an inertial sensor and/or positional sensor within the wearable device. A race profile, modeled as a non-linear function of time over distance, is retrieved from stored historical race data of multiple athletes. The system determines a predicted race time based on the retrieved race profile and real-time performance data, calculates a probability score indicating the likelihood of achieving a preset target time, and provides real-time feedback through the wearable device. The system further incorporates machine learning models to classify race profiles, refine predictions based on environmental conditions, and adapt pacing recommendations based on detected fatigue indicators. The method enables the athlete to optimize effort distribution and race strategy dynamically, improving performance outcomes through real-time analysis and adaptive recommendations.

A system and method for predicting and optimizing an athlete's race performance using a wearable device is disclosed. The method involves measuring intermediate times at predetermined distances utilizing an inertial sensor and/or positional sensor within the wearable device. A race profile, modeled as a non-linear function of time over distance, is retrieved from stored historical race data of multiple athletes. The system determines a predicted race time based on the retrieved race profile and real-time performance data, calculates a probability score indicating the likelihood of achieving a preset target time, and provides real-time feedback through the wearable device. The system further incorporates machine learning models to classify race profiles, refine predictions based on environmental conditions, and adapt pacing recommendations based on detected fatigue indicators. The method enables the athlete to optimize effort distribution and race strategy dynamically, improving performance outcomes through real-time analysis and adaptive recommendations.