A trampoline includes a bounce fabric, a plurality of fabric clamps and a fixed frame. The bounce fabric is connected to the fabric clamps, and one end of the fabric clamp is connected to one end of a spring. The fixed frame includes connectors and frame grooved pipes. The surface of the frame grooved pipe is provided with a grooved-pipe horizontal channel, and the other end of the spring is connected to the grooved-pipe horizontal channel on the surface of the frame grooved pipe. The connector is provided with a grooved-pipe connecting end and a support-pipe connecting end. The inner side of the grooved-pipe connecting end is provided with a through hole, and the surface of the grooved-pipe connecting end is provided with a groove. One end of the frame grooved pipe is arranged in the through hole. The groove is arranged in the grooved-pipe horizontal channel.

A resistance exercise apparatus enabling multiple concurrent workout/exercise movements includes a pair of handles adapted to be gripped by the hands of a user, a pair of first couplers connected to the pair of handles, a second coupler, a pair of ankle bands being adjustable to grip lower legs of the user above the ankles, and a plurality of elastic cords made of flexible and stretchable material. Selected ones of the plurality of elastic cords connect to and extend between the pair of first couplers and the second coupler and also connect to and extend between the second coupler and the pair of ankle bands.

An isometric force resistant exercise tool has a left handle form interfaced to a right handle form over an axle shaft locked to the right handle form, the axle shaft supporting a pressure plate, a compress able spring or set of springs, and a compression adjustment handle threaded onto the axle shaft and abutting the compress able spring or spring set, the pressure plate adjacent in assembly to a friction-resistive material fixed on the left handle form, the left handle form including a piston form interfacing with a ring housing on the right handle form, the piston form adjacent in assembly to a friction-resistive material fixed on the right handle form. Gripping the handle forms and rotating the against force resistance exercises one or more muscle groups.

An exercise machine adjustable resistance system and method for efficiently varying the workout resistance for an exercise machine. The exercise machine generally includes a carriage movably positioned with respect to the at least one rail, a plurality of springs selectively connectable to the carriage to provide a resistance level to the carriage, a plurality of electrically actuated mechanical devices adapted to latch a corresponding one of the plurality of springs to the carriage when in the latch state and unlatch a corresponding one of the plurality of springs to the carriage when in the unlatch state and a control unit in communication with the plurality of electrically actuated mechanical devices to selectively control the state of each of the plurality of electrically actuated mechanical devices to be within the latch state or the unlatch state.

An exercise machine resistance adjustment system for providing an exerciser the ability to immediately adjust the resistance force by changing their body position on the movable carriage or end platforms. The exercise machine resistance adjustment system generally includes a frame, a carriage movably positioned on the frame, a spring connected to the carriage to apply a biasing force to the carriage, one or more left projections within the carriage adapted for a left hand of an exerciser to grasp, and one or more right projections within the carriage adapted for a right hand of an exerciser to grasp. The exerciser is able to efficiently adjust the amount of resistance force applied to the carriage by repositioning their hands (or feet) from a first set of projections at a first distance to a second set of projections at a second distance from the first end of the exercise machine.

An apparatus for exercising the muscles. The apparatus includes an exercising device having a power arm or lever, which can be equipped with actuating elements at a first end of the power arm or lever. A second end of the power arm or lever is arranged on a retaining element in a way pivotable about a pivot axis at a first articulated joint. A compression-spring element can be articulated, by way of a first end of the compression-spring element at a first point of articulation on the power arm and articulated, by way of a second end of the compression-spring element at a second point of articulation on the retaining element. A cable-pull arrangement has a cable and is fixed in a releasable manner in a spatial relationship to the exercising device, independently of the exercising device, by means of a first fixing device and is able to be combined with the power arm of the exercising device by means of a second fixing device, so that the cable-pull arrangement is connectible to the exercising device in order for training to take place.

Disclosed herein is an exercise machine that includes an elongated frame having a head end and a foot end, and a moveable carriage slidably coupled to the elongated frame and moveable between the head end and the foot end, the moveable carriage having a spring bracket coupled to an underside of the moveable carriage. The exercise machine also includes a spring support rod slideably coupled with the elongated frame and disposed adjacent the foot end, and selectively positionable with reference to the foot end by a handle that extends from an interior area of the elongated frame to an exterior area of the elongated frame. The exercise machine also includes at least one resistive member coupled at a first end with the spring support rod and at a second end with the spring bracket, and configured to bias the moveable carriage towards the foot end of the elongated frame.

A shoulder joint tracking apparatus includes a gravity compensation spring that compensates for a vertical movement of a shoulder joint of a trainee, a weight of an arm, and gravity to a weight of a rehabilitation exercise device attached to the arm, and a shoulder joint tracking device that is provided at one side of the shoulder rehabilitation apparatus, is connected to the gravity compensation spring, and applies a damping force corresponding to a force applied by the trainee, in a direction opposite to a direction in which the force is applied, to control a vertical movement of the shoulder rehabilitation apparatus.

A shoulder joint tracking apparatus includes a gravity compensation spring that compensates for a vertical movement of a shoulder joint of a trainee, a weight of an arm, and gravity to a weight of a rehabilitation exercise device attached to the arm, and a shoulder joint tracking device that is provided at one side of the shoulder rehabilitation apparatus, is connected to the gravity compensation spring, and applies a damping force corresponding to a force applied by the trainee, in a direction opposite to a direction in which the force is applied, to control a vertical movement of the shoulder rehabilitation apparatus.

A baseball hitting/training device consisting of a hitting tee and a baseball. The ball is preferably permanently bonded/molded to a spring. In a preferred arrangement, the ball rests upon an upper tee shaft segment which acts to protect the spring. A length of the spring extends from the ball, through the upper tee shaft segment and into a middle tee shaft segment. A retainer fastens the spring to the middle tee shaft segment. The middle tee shaft segment is inserted into a lower tee shaft segment. The lower tee shaft segment is fixed to a base. When hit with a bat, the baseball remains attached to the tee by the spring and then springs back to its original upright position.