Abstract: A shaped standing mat or base providing a trampoline-like rebounding surface that is a highly responsive and dynamic support surface for a standing person where that person is able to maintain a proper stance relative to their foot angle, and to engage in mild exercise movement and foot rotation and stretching without undue interruption of mental concentration in a work or other environment.

Abstract: A portable exercise system has a foldable perimeter frame comprising at least two elongated frame members that are joined by hinges. The hinges are joined to ends of the frame members, which ends are generally tubular. Each hinge has a cap-like body having an interior surface that defines a cavity configured to nestingly receive one of the ends of the frame members. A deformable plug is located within the central cavity of the one of the ends. A tightening mechanism is operated to expand the plug radially and thereby cause the end to expand radially such the generally tubular outer surface of the end frictionally engages the interior surface of the a cap-like body.

Abstract: A shaped standing mat or base providing a trampoline-like rebounding surface that is a highly responsive and dynamic support surface for a standing person where that person is able to maintain a proper stance relative to their foot angle, and to engage in mild exercise movement and foot rotation and stretching without undue interruption of mental concentration in a work or other environment.

Abstract: A shaped standing mat or base providing a trampoline-like rebounding surface that is a highly responsive and dynamic support surface for a standing person where that person is able to maintain a proper stance relative to their foot angle, and to engage in mild exercise movement and foot rotation and stretching without undue interruption of mental concentration in a work or other environment.

Abstract: A shaped standing mat or base providing a trampoline-like rebounding surface that is a highly responsive and dynamic support surface for a standing person where that person is able to maintain a proper stance relative to their foot angle, and to engage in mild exercise movement and foot rotation and stretching without undue interruption of mental concentration in a work or other environment.

Abstract: A portable exercise system has a foldable perimeter frame comprising at least two elongated frame members that are joined by hinges. The hinges are joined to ends of the frame members, which ends are generally tubular. Each hinge has a cap-like body having an interior surface that defines a cavity configured to nestingly receive one of the ends of the frame members. A deformable plug is located within the central cavity of the one of the ends. A tightening mechanism is operated to expand the plug radially and thereby cause the end to expand radially such the generally tubular outer surface of the end frictionally engages the interior surface of the a cap-like body.

Abstract: A portable exercise system has a foldable perimeter frame comprising at least two elongated frame members that are joined by hinges. The hinges are joined to ends of the frame members, which ends are generally tubular. Each hinge has a cap-like body having an interior surface that defines a cavity configured to nestingly receive one of the ends of the frame members. A deformable plug is located within the central cavity of the one of the ends. A tightening mechanism is operated to expand the plug radially and thereby cause the end to expand radially such the generally tubular outer surface of the end frictionally engages the interior surface of the a cap-like body.

Abstract: A trampoline with a frame has a rebounding mat that is tensioned to the frame with a plurality of flexible and cordlike linear elastic members. Preferably each cordlike elastic member is connected to the frame and the rebounding mat at one of two alternative positions to alter the tension. The alternative positions permit a tensioning process that extends the lifetime of elastic cords having a fabric sheath. This independent tension of each elastic member is via connector member that grips the rebounding mat but also grasps opposing the ends of the elastic members as well as central portion thereof so that two segment of the cord between each end and the central portion are preferably wrapped around the trampoline frame.

Abstract: A portable exercise system has a foldable perimeter frame comprising at least two elongated frame members that are joined by hinges. The hinges are joined to ends of the frame members, which ends are generally tubular. Each hinge has a cap-like body having an interior surface that defines a cavity configured to nestingly receive one of the ends of the frame members. A deformable plug is located within the central cavity of the one of the ends. A tightening mechanism is operated to expand the plug radially and thereby cause the end to expand radially such the generally tubular outer surface of the end frictionally engages the interior surface of the a cap-like body.

Abstract: A trampoline with a frame has a rebounding mat that is tensioned to the frame with a plurality of flexible and cordlike linear elastic members. Preferably each cordlike elastic member is connected to the frame and the rebounding mat at one of two alternative positions to alter the tension. The alternative positions permit a tensioning process that extends the lifetime of elastic cords having a fabric sheath. This independent tension of each elastic member is via connector member that grips the rebounding mat but also grasps opposing the ends of the elastic members as well as central portion thereof so that two segment of the cord between each end and the central portion are preferably wrapped around the trampoline frame.

Abstract: A trampoline-type device comprises an encompassing frame supported by plural legs and a mat suspended on the frame. The frame is supported by no less than three legs. Support members attachable to the frame convert the device into a plyometric rebounder.