An exercise system and an adjustment method thereof. The exercise system includes an exercise machine and a data transmission device. The exercise machine includes a control unit, a storage unit, a stepless force device, a sensor, a user operation part and an operation interface. During exercise, the control unit executes the exercise program to dynamically change resistance according to a sensed location, speed or acceleration of the user operation part and an adjustable parameter. Through the data transmission device, the user can download the personal training parameter from a remote device into the exercise machine, or upload the training result and the personal training parameter to the remote device.

A pulley system of an exercise device for suspended weight training includes a first block with a first pulley, a second pulley, and a first attachment point. A second block is removably coupled to a weight and includes a third pulley and a second attachment point. A grip is configured to be held by a user while exercising and has a third attachment point. A line having a first line end is fixedly coupled to the grip and a second line end fixedly is coupled to a connection element. The connection element is configured to be selectively coupled to each of the first attachment point, the second attachment point, and the third attachment point, permits a user to reduce an effective amount of the weight lifted by the user with movement of the grip to a pre-selected fraction of the weight.

A multifaceted exercise system is provided having several components, each capable of performing a different exercise. A vest worn by the exerciser has front segment and back segment, each segment having spaced apart O-rings and resistance bands secured by each O-ring adapted to be forced forward and laterally in order to exercise the chest. The back segment of the vest is provided with a panel member having roller receiving cavities each having fitted with a roller for performing a squatting exercise by moving the back panel member up and down a flat surface such as a wall. The back segment of the exercise device is also provided with a left O-ring and a right O-ring, a left resistance band having its upper end secured to the left O-ring and its lower end secured to the left foot, and a right resistance band having its upper end secured to the right O-ring and its lower end secured to the right foot. The exerciser can conduct abdominal exercises by removing the panel member from the back of the vest, placing it on a flat surface, and pushing and pulling the panel member using the hands of the exerciser.

A chair arm exercise apparatus includes three distinct back positions with hand resistance members such as springs supported from a pair of supports spaced from the upper end of the back. The arm chair includes a base configured to rest on a horizontal floor surface, a seat, a pair of spaced apart trapezoidal shaped upright frame sides, a front upright end wall beneath and supporting a front end of the seat, a seat back pivotally supported from the frame sides behind the seat, and a seat cross member beneath the rear edge of the seat fastened to the frame sides. In a first position the back is at about 90 degrees to the seat. In a second position the back is about 80 degrees to the seat. In the third position the back is reclined.

A rear handlebar assembly in combination with a seat and a supporting member of a stationary bike, includes a seat of a stationary bike for supporting a rider thereon. A supporting member supports the seat of the stationary bike. A joining member includes a vertical bore and a horizontal bore, the vertical bore receiving therein the supporting member, the horizontal bore receiving therein a shaft coupled to flanges of the seat. A clasp holds the joining member against the supporting member. A crossbar forms a rear handlebar adapted to support the hands of a rider in an upright riding position. A rearwardly extending member connects the joining member to the crossbar. A pair of hand grips can be positioned on the crossbar.

A fitness structure includes a bar having a first end portion and a second end portion, a pair of bar support portions provided at each side of the bar and having a plurality of bar support members to place the bar at a plurality of heights, a first load portion and a second load portion spaced apart from the bar to a certain degree and facing each other, a first cable coupled between the first end portion of the bar and the first load portion, a second cable coupled between the second end portion of the bar and the second load portion. Heights of the first load portion and the second load portion vary depending on a height of one of the plurality of bar support members at which the bar is detachably placed.

An interactive exercise system with apparatus and methods to optimize muscle strength for rehabilitation, to improve or maintain fitness, and to enhance the performance of athletes. The system uses an electronically controlled linear actuator to generate resistance against the muscular force exerted by the user. The system includes sensors configured to detect acceleration, speed, velocity, position, direction of movement, duration, and the force applied by the user. A control system preferably continuously monitors the sensors, and instantaneously adjusts the adaptive actuator. This provides a proportional counterforce to the user force throughout the entire range-of-motion. A display panel allows the user to interact with the system in real-time. The objective of the user is to synchronize the exercise performance with a selected target goal, by correlating the user's movement relative to a position on a display panel.

The embodiments herein provide a portable hamstring stretcher for stretching hamstring muscles and inner thigh muscles. The portable hamstring stretcher comprises a primary board, a secondary board (leg pieces), a plurality of hinges, a chain, a plurality of ratchet straps, a ratchet, a plurality of hinges, and a plurality of adjustable straps. A user lies down on the primary board and wraps his legs using the adjustable straps on the secondary board to exercise the hamstring muscles.

The upper body exercise device is a resistance based training device that is adapted for use by a person. Specifically, the upper body exercise device uses the weight of the exerciser to generate a counterforce that provides resistance to specific upper body exercises. The upper body exercise device comprises a frame, a first resistance system, a second resistance system, and a third resistance system.

A bar or tube with two slots on each side configured to accept a flat or round elastic exercise band or cord; wherein said slots may be rounded along the edges so as not to tear or slice at the elastic exercise band or cord. The elastic exercise band or cord may be tied into knots or bulges on either end and such knots may be inserted into the slots of the bar making it ready for use. The bar may also comprise adapters to adjust the size of the slots to different sizes of flat elastic bands or cords. The invention may also comprise a rubber roller which may be made to house a vibrating unit, said housing unit may be turned on by a switch when held to the body.