Abstract: A variable-color region (106) of an information-presentation structure extends to an exposed surface (102) at a surface zone (112), normally appears along it as a principal color, and includes pressure-sensitive color-change structure (132) and pressure-spreading structure (242) having an internal pressure-spreading surface (244). An object (104) impacts the zone at an object-contact area (116). The pressure-spreading structure spreads pressure of the impact along a distributed-pressure area (256) of the pressure-spreading surface. A segment (142) of the pressure-sensitive color-change structure responds to the excess internal pressure along the distributed-pressure area by causing an impact-dependent portion (138) of the variable-color region to temporarily appear along a print area (118) of the zone as changed color materially different from the principal color if the excess internal pressure meets excess internal pressure criteria.

Abstract: A variable-color region (106) of an information-presentation structure extends to an exposed surface (102) at a surface zone (112) and normally appears along it as a principal color. An impact-dependent portion (138) of the variable-color region responds to an object (104) impacting the zone at an object-contact area (116) by providing an impact signal if the impact meets threshold impact criteria. The impact signal identifies an expected location of a print area (118) in the zone. The print area meets one of plural different print-area location criteria respectively corresponding to plural changed colors materially different from the principal color. Responsive to the impact signal, a controller (702) determines which location criterion is met by the print area and provides an initiation signal at a corresponding condition. The impact-dependent portion responds to the initiation signal by temporarily appearing along the print area as the changed color for that location criterion.

Abstract: Principal and secondary regions (106 and 108) of an information-presentation structure extend to an exposed surface (102) respectively at principal and secondary surface zones (112 and 114) variously impacted by a spherical object (104) that rebounds from the surface. The principal region normally appears along the principal zone as a principal color. An impact-dependent portion (138) of the principal region responds to the object impacting the principal zone at an object-contact area (116) by temporarily appearing along a print area (118) of the principal zone as changed color materially different from the principal color. The print area closely matches the object-contact area in size, shape, and location. The secondary region fixedly appears along the secondary zone as a secondary color. Restitution matching is provided across the two zones so that the rebound characteristics of the object are largely independent of whether it contacts the principal or secondary zone.

Abstract: An exercise machine suitable for exercising a person's muscles contains a frame (100Y), a seat (102) situated over the frame, a seatback (104 or 104Y), a connection mechanism (106 or 106Y) for flexibly and adjustably connecting the seatback to the frame or/and the seat, and a pedaling mechanism (112Y) connectable to the frame and having a pair of movable foot pedals (140). The seatback is capable of swiveling and can be segmented to facilitate swiveling. The machine typically has a pair of retractable frame legs (302) so that the machine can be used for stationary cycling when the legs are retracted and as an elevated exercise bench when the legs extend downward. The machine may include a mechanism for rapidly switching the seatback between inclined and flat positions.

Abstract: An exercise machine suitable for exercising a person's muscles contains a frame (100Y), a seat (102) situated over the frame, a seatback (104), a connection mechanism (106Y) for flexibly and adjustably connecting the seatback to the frame or/and the seat, and a pedaling mechanism (112Y) connectable to the frame and having a pair of movable foot pedals (140). The connection mechanism includes (a) a seatback-attaching portion (120, 180, 184, 186, 188, and 190) attached to the seatback and (b) a support rod (128Y) extending between the seatback-attaching portion and a location within the frame. The support rod is of adjustable length for adjusting the incline of the seatback to the seat. The seatback can swivel about a swivel axis of the connection mechanism. The exercise machine normally has a pair of frame legs (302).

Abstract: An exercise machine suitable for exercising a person's muscles contains a frame (100Y or 100Z), a seat (102) situated over the frame, a seatback (104 or 104Y), a connection mechanism (106 or 106Y) for flexibly and adjustably connecting the seatback to the frame or/and the seat, a pedaling mechanism (112Y or 112Z) connectable to the frame and having a pair of movable foot pedals (140), and a pair of frame legs (302 or 470). The seatback is typically capable of swiveling and can be segmented to facilitate swiveling. The legs can typically be retracted for enabling the machine to be used for stationary cycling when the legs are retracted and as an elevated exercise bench when the legs extend downward. Alternatively, the legs may permanently elevate the frame, seat, and seatback above the underlying surface. With the legs extending downward and with the pedaling mechanism connected to the frame, the pedaling mechanism can typically be tilted downward to facilitate use of the machine as an exercise bench.