Abstract: A batting tee has a post including a ball holder on a top end of a post, and a tube cap on a bottom end of the post. A receptacle is positioned in a recess in a base frame having a through hole. The tee is set up for use by passing the post through the through hole from the bottom of the base and securing the tube cap to the base. The batting tee may be set up for use, and disassembled for transport or storage, quickly and easily.

Abstract: An agility ladder includes a plurality of rungs, a left link assembly disposed between each rung and including ends pivotally attached to left ends of each rung, a right link assembly disposed between each rung and including ends pivotally attached to right ends of each rung, and first and second links included on each of the left and right link assemblies. The first and second links may be pivotally attached at a link pivot joint, where, through pivotal attachment of the left and right link assemblies with the plurality of rungs and pivotal attachment of the first and second links, the plurality of rungs are moveable from an open position where the plurality of rungs are spaced apart from one another to a collapsed position where the plurality of rungs are aligned adjacent to one another and are not overlapping with one another.

Abstract: An agility ladder has a plurality of rungs including first and second rungs. A left link assembly has ends pivotally attached to left ends of the first and second rungs, and a right link assembly has ends pivotally attached to right ends of the first and second rungs. The left and right link assemblies each include first and second links having equal lengths, with the first and second links joined at a link pivot joint which allows the first and second links to form an angle between them of less than 180 degrees.

Abstract: A batting tee has a post including a ball holder on a top end of a post, and a tube cap on a bottom end of the post. A receptacle is positioned in a recess in a base frame having a through hole. The tee is set up for use by passing the post through the through hole from the bottom of the base and securing the tube cap to the base. The batting tee may be set up for use, and disassembled for transport or storage, quickly and easily.

Abstract: An agility pole or a passing arc includes one or more receptacles adjacent to a first end of a tube. A spike assembly has one or more fittings, and a spike attached to a holder adapted to slide into the first end of the tube, in a spike-in position wherein the spike is within the tube, and in a spike-out position wherein the spike is substantially outside of the tube. The fittings engage the receptacles in the spike-in position and in the spike-out position. The agility pole or passing arc may be transported and stored in the spike-in position so that injury or damage from the spike is avoided.

Abstract: A field cone collector includes a tube attached to a handle. A pair of arms is pivotally supported at a lower end of the tube. A spring urges the arms into a first position wherein an end of each arm projects out of the tube. A linkage within the tube extends from the pair of arms to an upper end of the tube, optionally to a sliding trigger. Actuation of the linkage moves the arms into a second position wherein the arms are withdrawn towards or into the tube. A field cone may be collected by pushing the lower end of the tube through an opening in the field cone. The arms momentarily move inwardly as they pass through the opening, and then move back to the first or projecting position to hold the field cone onto the tube.

Abstract: An adjustable height hurdle may have a rigid base with a slider movable on or in a track to different base length positions. A flexible bridge may have a first end attached to the slider and a second end attached to the track. The bridge is movable from an erect position wherein the bridge is on a top side of the base and the hurdle has an isosoles trapezoid shape, to a collapsed position wherein the bridge is on a bottom side of the base. The height of the hurdle is adjusted by changing the length of the base.

Abstract: A retractable line putting trainer includes a spool unit including a spring-retractable tape in a tape housing supported on a base plate. The leading end of the tape is attached to a stand. The spool unit is placed at the cup or hole on a green and the tape extends out from the spool unit as the stand is pulled away to a desired ball position. Markings on the tape may visually indicate distance to the cup, back stroke position and front stroke position of the putter swing.

Abstract: An adjustable height hurdle may have a rigid base with a slider movable on or in a track to different base length positions. A flexible bridge may have a first end attached to the slider and a second end attached to the track. The bridge is movable from an erect position wherein the bridge is on a top side of the base and the hurdle has an isosoles trapezoid shape, to a collapsed position wherein the bridge is on a bottom side of the base. The height of the hurdle is adjusted by changing the length of the base.

Abstract: A reducer for a basketball rim has a circular reducer ring having a diameter less than the basketball rim. Rim clips may be slidably positioned on pins extending radially outwardly on the reducer ring. The clips may have a tube section adapted to fit onto the basketball rim. A rebounder may be attached onto the reducer, or to the rim. The rebounder may have a plurality of spokes with outer ends of the spokes attached to a circular rebounder ring and inner ends of the spokes attached to a central hub. The spokes may have at least one concave section and one convex section.

Abstract: A jump rope has a rope rotatably attached to handles. One or both handles has a grip, and a cap on a shaft supported by one or more bearings, to allow the cap to rotate with the shaft relative to the grip. The rope extends through an adjustment hole in the cap. The shaft is moveable relative to the cap to place the handle into a locked configuration where the rope is clamped in place and prevented from moving through the cap, and into an unlocked configuration where the rope is moveable through the cap to adjust the length of the rope.

Abstract: An agility ladder has a plurality of rungs including first and second rungs. A left link assembly has ends pivotally attached to left ends of the first and second rungs, and a right link assembly has ends pivotally attached to right ends of the first and second rungs. The left and right link assemblies each include first and second links having equal lengths, with the first and second links joined at a link pivot joint which allows the first and second links to form an angle between them of less than 180 degrees.