Abstract: A lever system teaching tool includes a frame and an elongate member that is releasably coupled to the frame. The elongate member defines a plurality of mounting stations along its length. The elongate member can be pivotally or rotatably coupled to the fulcrum of the frame at any of the mounting stations. The elongate member includes repositories at opposite ends of the elongate member. The repositories are sized and shaped to retain one or more incremental loads.

Abstract: An active desk includes a base having a convex surface defining at least one rocking path; a frame coupled to the base at an opposite end from the convex surface; a desk mounted to the frame; and a seat mounted to the frame at a location spaced between the base and the desk. A study seat includes a base; a frame extending upwardly from the base; a desk mounted to the frame and laterally offset from the base; and a seat mounted to the frame and laterally offset from the desk.

Abstract: An active seat includes a seat disposed at a first end of a body; a convex surface disposed at a second end of the body; and a stacking notch defined at an intermediate location along the body. The convex surface defines at least a first rocking path about which the active seat tilts. The stacking notch defines a flat surface recessed laterally inwardly from an outer periphery of the body taken at the first and second ends.

Abstract: An athletic tire training device includes a compressible body having a flat surfaced top, flat surfaced base, a surrounding wall extending between the top and base, and an interior wall extending between the top and base. The surrounding wall has an exterior surface with flat sides. The interior wall surrounds an open interior volume. The body has a weight of at least 20 pounds. The training device is usable in a variety of functional training exercises.

Abstract: An active stool includes a base and a cover. The base defines an interior cavity accessible through an open end of the base. The cover removably mounts to the base to cover the open end. The cover defines a seat for a user. The base is configured to tilt along at least one rocking path. Certain types of bases are configured to tilt along multiple rocking paths.

Abstract: Wrist-mounted monitors (e.g., heart rate monitors) can include rechargeable power sources, which can be recharged at a single charging base. Each of the monitors can be placed at a respective charging station of the charging base. Power is supplied to the charging base (e.g., via a cable) from an electrical outlet, a computer, or other power source. The charging stations are shaped and sized to accommodate the wristbands of the monitors.

Abstract: Stackable stools include rocking surfaces along which the stools can be rocked to allow a user to sway to and fro. The stools have rest surfaces that provide stable inclined positions of the stools. The stools can be stacked together to save space. The stools define holes allowing the stools to be stacked on a pole.

Abstract: An athletic tire training device includes a compressible body having a flat surfaced top, flat surfaced base, a surrounding wall extending between the top and base, and an interior wall extending between the top and base. The surrounding wall has an exterior surface with flat sides. The interior wall surrounds an open interior volume. The body has a weight of at least 20 pounds. The training device is usable in a variety of functional training exercises.

Abstract: A weight bar system includes a weight bar, and two lock collars on each end of the weight bar for holding one or more weights on each end of the weight bar. The ends of the weight bar include circumferentially positioned grooves. A locking collar is engageable with the grooves both in an unlocked and a locked position. The locking collar includes a main body collar including pins which extend in a cross direction relative to the axis and are moveable radially inwardly and outwardly relative to the grooves. A rotatable collar includes a cam surface to move the pins radially inwardly to lock the locking collar to the weight bar. A stationary collar may also be provided to limit rotation of the rotatable collar, and to provide a gripping surface. A space on the lock collar may be provided to press against the weights.