A device for use with an exerciser device, such as a reformer, which permits adjustment of a resistance system, even when connected to a resistance source, by selectively relieving a resistance force imparted on the resistance adjustment system when changing a resistance and automatically reengaging the resistance force when exercising. A strain relief is coupled to a linkage between the resistance source and a resistance adjuster. When engaged, the strain relief selectively reduces the resistance force transmitted through the linkage to the resistance adjuster to permit movement of the resistance adjuster relative to a purchase. When disengaged the strain relief permits transmission of the resistance force through the linkage to the resistance adjuster.

The present invention relates to a chest expander, wherein the chest expander includes a pair of operating arms that are connected by a rotating shaft to approach or be spaced apart from each other, a plurality of elastic force adjusting holes formed as through holes in a longitudinal direction of the operating arm, elastic members that are disposed between the operating arms to cross and configured to provide an elastic force in a direction in which the operating arms are spaced apart from each other when the operating arms approach each other, and elastic force adjusting parts that allow one end portions of the elastic members to move along the elastic force adjusting holes and to be fixed so that lengths of the elastic members between the operating arms are changed so as to adjust strength levels of the elastic forces of the elastic members.

A physical therapy device includes one or more balance pedals. The balance pedals are slidable along one or more resistance bands.

A sports swing muscle memory development device comprising attachment components, connection components, and resistance components to enable the development of swing relationship. Further embodiments allow for an adjustable swing relationship to further enhance the effectiveness of the sports swing muscle memory development device.

An ab exercise device including a first tube member, a second tube member movable with respect to the first tube member, an elastic member resisting a downward movement of the second tube member and moving the second tube member upward with respect to the first tube member, a first and a second side part for supporting the ab exercise device respectively against a first and a second surface, the first and the second side part being arranged respectively to a first and a second side of the first tube member in an upper end of the first tube member, and a top part for pressing down the second tube member, the top part being attached to the second tube member.

An exercise device includes a resilient compression member configured to resist a compressive force from a user, and a resilient tension member configured to couple to opposing sides of the compression member. The resilient tension member is also configured to form a first portion of a loop around the compression member and the user, and resist a tensile force from the user. The exercise device also includes an extension member configured to connect with opposing ends of the tension member to form a second portion of the loop around the compression member and the user.

A physical therapy and fitness device which includes one or more balance pedals slidahle along one or more resistance bands. Handles may be used with the resistance bands, and the balance pedals may include an elongated slot through which the band(s) slide. Each balance pedal may include opposing projecting raised ledges to facilitate bolding a foot in place during use of the device.

A spring exercise system and method of exercising that allows a user to perform a full body, low-impact style of exercise. The system utilizes a non-fixed extension spring that stretches and generates resistance when pulling and pressing forces are applied. The extension spring or springs are stretchable between multiple types of interchangeable grasp handles which may include any combination of a resilient loop handle with or without double “D” rings, a single rigid handle, and/or a resilient double loop handle. The spring may have a swiveling link or other mechanism/structure that joins the free ends of the spring to the grasp handles allowing a 360° rotation. The grasp handles are used with combinations of hands and feet, arms and legs to generate an extension of resistance that stretches, strengthens and tones muscles, enhances flexibility, core strength, joint stability, and muscle balance.

An exercise and rehabilitation bar including a flexing bar, at least one resistance insert, and at least one handle. The flexing bar has a first end, a second end, and a cavity running from the first end to the second end. The at least one resistance insert is removably carried within the cavity of the flexing bar and the at least one handle is removably securable to either the first or second end of the flexing bar.

A multifunctional fitness equipment that allows the user to perform a variety of exercises either indoors or outside. The fitness equipment enables the user to perform exercises with the use of weights or their own body weight for resistance and stability. The fitness equipment can be utilized as a sled in which the user can perform cardiovascular conditioning with use of a harness attached to it. In addition, the user can utilize a variety of attachments such as battle ropes, resistance bands, and punching bag to perform a variety of exercises. The fitness equipment is mobile and can also be used by multiple people at the same time.