An exercise machine is described that incorporates a double retractable resistance band system for rowing exercises and that includes a multi-purpose, morphable swinging seat assembly that applies to convertible exercise machines and rowing boats. The double retractable rowing system is detachably integrated into a base plate (inclined planar board) of the exercise machine. The base plate consists of a platform set at an angle consistent with the foot-placements of sit-down rowing machines and rowing shells together with an integral set of quick-release slots located above and to the outside of the toes of the foot placement positions. The multi-purpose, morphable swinging seat assembly provides an improved method/structural assembly for seat-based rowing machines, convertible/multi-purpose exercise machines and an improved architecture for boat-based rowing systems.

Equipment for the conversion of a sailboat hull, having a substantially rectangular cockpit, into a rowing boat includes a frame that is substantially rectangular. Such frame is shaped to be arranged with the two major sides at the two major sides of the cockpit and is provided with a removable locking system of the frame to the hull of the boat. Two cantilever members jut out beyond the sides of the hull and are connected to the frame at one end and are provided with rowlocks on the other end. A seat is also provided, slidable along at least one couple of guides parallel to the major sides of the frame.

Equipment for the conversion of a sailboat hull, having a substantially rectangular cockpit, into a rowing boat includes a frame that is substantially rectangular. Such frame is shaped to be arranged with the two major sides at the two major sides of the cockpit and is provided with a removable locking system of the frame to the hull of the boat. Two cantilever members jut out beyond the sides of the hull and are connected to the frame at one end and are provided with rowlocks on the other end. A seat is also provided, slidable along at least one couple of guides parallel to the major sides of the frame.

Equipment for the conversion of a sailboat hull, having a substantially rectangular cockpit, into a rowing boat includes a frame that is substantially rectangular. Such frame is shaped to be arranged with the two major sides at the two major sides of the cockpit and is provided with a removable locking system of the frame to the hull of the boat. Two cantilever members jut out beyond the sides of the hull and are connected to the frame at one end and are provided with rowlocks on the other end. A seat is also provided, slidable along at least one couple of guides parallel to the major sides of the frame.

Equipment for the conversion of a sailboat hull, having a substantially rectangular cockpit, into a rowing boat includes a frame that is substantially rectangular. Such frame is shaped to be arranged with the two major sides at the two major sides of the cockpit and is provided with a removable locking system of the frame to the hull of the boat. Two cantilever members jut out beyond the sides of the hull and are connected to the frame at one end and are provided with rowlocks on the other end. A seat is also provided, slidable along at least one couple of guides parallel to the major sides of the frame.

An oarlock that is designed to be used with an oar-right. It is an oarlock that has a pin for securing the oarlock in an oar holder or gunwale of a boat. A U-shaped bracket is attached to the pin. There is a formed piece that has a cylindrical upper portion and a lower squared portion that is secured to the U-shaped bracket. An oar fits into the cylindrical upper portion and the oar-right fits into the lower squared portion of the formed member. The U-shaped bracket can rotate on the pin, which means that the oarlock can rotate 360 degrees and the formed member is free to pivot between the arms of the U-shaped bracket. Because the formed piece is a closed member, the oar cannot come out of the oarlock no matter how much the oar maybe moved or jostled by rough water, nor can the oar rotate on its own axis.

An oarlock that is designed to be used with an oar-right. It is an oarlock that has a pin for securing the oarlock in an oar holder or gunwale of a boat. A U-shaped bracket is attached to the pin. There is a formed piece that has a cylindrical upper portion and a lower squared portion that is secured to the U-shaped bracket. An oar fits into the cylindrical upper portion and the oar-right fits into the lower squared portion of the formed member. The U-shaped bracket can rotate on the pin, which means that the oarlock can rotate 360 degrees and the formed member is free to pivot between the arms of the U-shaped bracket. Because the formed piece is a closed member, the oar cannot come out of the oarlock no matter how much the oar maybe moved or jostled by rough water, nor can the oar rotate on its own axis.

An exercise machine is described that incorporates a double retractable resistance band system for rowing exercises and that includes a multi-purpose, morphable swinging seat assembly that applies to convertible exercise machines and rowing boats. The double retractable rowing system is detachably integrated into a base plate (inclined planar board) of the exercise machine. The base plate consists of a platform set at an angle consistent with the foot-placements of sit-down rowing machines and rowing shells together with an integral set of quick-release slots located above and to the outside of the toes of the foot placement positions. The multi-purpose, morphable swinging seat assembly provides an improved method/structural assembly for seat-based rowing machines, convertible/multi-purpose exercise machines and an improved architecture for boat-based rowing systems.

An exercise machine is described that incorporates a double retractable resistance band system for rowing exercises and that includes a multi-purpose, morphable swinging seat assembly that applies to convertible exercise machines and rowing boats. The double retractable rowing system is detachably integrated into a base plate (inclined planar board) of the exercise machine. The base plate consists of a platform set at an angle consistent with the foot-placements of sit-down rowing machines and rowing shells together with an integral set of quick-release slots located above and to the outside of the toes of the foot placement positions. The multi-purpose, morphable swinging seat assembly provides an improved method/structural assembly for seat-based rowing machines, convertible/multi-purpose exercise machines and an improved architecture for boat-based rowing systems.

An exercise machine is described that incorporates a double retractable resistance band system for rowing exercises and that includes a multi-purpose, morphable swinging seat assembly that applies to convertible exercise machines and rowing boats. The double retractable rowing system is detachably integrated into a base plate (inclined planar board) of the exercise machine. The base plate consists of a platform set at an angle consistent with the foot-placements of sit-down rowing machines and rowing shells together with an integral set of quick-release slots located above and to the outside of the toes of the foot placement positions. The multi-purpose, morphable swinging seat assembly provides an improved method/structural assembly for seat-based rowing machines, convertible/multi-purpose exercise machines and an improved architecture for boat-based rowing systems.