A movable dasher board system optimizes user safety in a hockey rink or similar arena. A bottom structure, provided by a sliding bottom surface or roller assembly, has low friction characteristics, typically a .sub.s of 0.05 or less with respect to ice if a sliding surface, or if roller bearings an effective coefficient of rolling friction 0.04 or less. A dasher board assembly is operatively connected to and extends upwardly from the bottom structure. Biasing and impact force absorbing devices (such as pneumatic or hydraulic or spring-encasing telescoping tubes, or foam, gel, or compression springs) bias the bottom structure and dasher board assembly to a desired position and absorb the impact of a human hitting the dasher board assembly to minimize the possibility of injury to the human. The system may be installed in a pre-existing rink or other arena.

An open field game arrangement includes glowing targets and provides responses, such as lights and sounds, when the targets are hit.

A sporting field measurement system is disclosed wherein a user is prompted to select, on a mobile device, a field for marking from various sporting field types including, but not limited to football, baseball, softball, soccer, lacrosse, track, tennis, basketball, cricket, polo, rugby, Australian football, volleyball, and badminton. The Global National Satellite System (GNSS) or at least the global positioning system (GPS) is used to locate a user's device. An application displays, on a display, of the mobile device, the dimensions of the specified sporting field as an overlay on a map, generated by the positioning system and it will communicate with the GNSS or GPS of the device to allow the user to track his or her movement along a specified path of a proposed field. This will allow the user to place the appropriate markers and/or paint the field. Deviations from the path may be indicated on the display of the mobile device or by an audio indication generated by the mobile device.

A sporting field measurement system is disclosed wherein a user is prompted to select, on a mobile device, a field for marking from various sporting field types including, but not limited to football, baseball, softball, soccer, lacrosse, track, tennis, basketball, cricket, polo, rugby, Australian football, volleyball, and badminton. The Global National Satellite System (GNSS) or at least the global positioning system (GPS) is used to locate a user's device. An application displays, on a display, of the mobile device, the dimensions of the specified sporting field as an overlay on a map, generated by the positioning system and it will communicate with the GNSS or GPS of the device to allow the user to track his or her movement along a specified path of a proposed field. This will allow the user to place the appropriate markers and/or paint the field. Deviations from the path may be indicated on the display of the mobile device or by an audio indication generated by the mobile device.

A modular field that includes a plurality of coplanar wall segments connected together by a plurality of stanchions and a plurality of corner stanchions to connect together wall segments oriented perpendicular to each other. The size of the modular field may be varied by the number and/or size of wall segments. Lights may be connected to the corner stanchions. One or more doors to allow ingress into the modular field may be connected to adjacent wall segments by the stanchions. Goals may be connected to wall segments at opposite sides of the modular field by the stanchions. The stanchions may include a base plate, a main support pole connected to the base plate, a channel receptacle connected to the base plate, a rear plate connected to the main support pole, a frame connected to the rear plate, a front plate, and a clamp connected to the main support pole.

Rate of deceleration is an important factor in determining the severity of injuries possibly sustained when participants collide with a wall assembly while playing, for example, ice hockey. Decreasing the rate of deceleration of the participant during such a collision with a wall assembly, by extending the distance over which a participant decelerates, is a key factor in reducing head and spinal injuries. The present disclosure provides apparatuses for decreasing the rate of deceleration by providing a wall assembly having a moveable piece that includes a first position and a plurality of second positions with a bias of the moveable piece to the first position. The movable wall assembly can move independently of a support frame, thereby further decreasing the rate of deceleration of a participant in a collision. The movable wall assembly can be supported on a base and slidable with respect to the base.

Rate of deceleration is an important factor in determining the severity of injuries possibly sustained when participants collide with a wall assembly while playing, for example, ice hockey. Decreasing the rate of deceleration of the participant during such a collision with a wall assembly, by extending the distance over which a participant decelerates, is a key factor in reducing head and spinal injuries. The present disclosure provides apparatuses for decreasing the rate of deceleration by providing a wall assembly having a moveable piece that includes a first position and a plurality of second positions with a bias of the moveable piece to the first position. The movable wall assembly can move independently of a support frame, thereby further decreasing the rate of deceleration of a participant in a collision. The movable wall assembly can be supported on a base and slidable with respect to the base.

Rate of deceleration is an important factor in determining the severity of injuries, such as head and neck injuries, possibly sustained when participants collide with a wall assembly while playing, for example, ice hockey. The described wall assemblies each include a support assembly and a movable wall assembly supported by and movable with respect to the support assembly. Telescoping parts of the movable wall assembly enable deflection of the movable wall assembly to complex angles with respect to the support assembly. In addition, movable wall assemblies can be coupled such that impact on one wall assembly can cause deflection of an adjacent wall assembly. Covers, shields, and spacers can be positioned to decrease gap formation during deflection of the movable wall assembly to reduce the risk of pinch points.