A jump rope device providing a retractable, length adjustable rope includes a first handle, which is tubular, a second handle, a housing that defines an interior space, and a rope. The housing is coupled a first end of the first handle so that the first handle is fluidically coupled to the interior space. A retractor is coupled to the housing and is positioned in the interior space. The rope is coupled to and extends between the second handle and the retractor. The retractor is operationally coupled to the rope so that the retractor is positioned to selectively retract the rope into the interior space. The second handle is configured to be grasped in a hand of a user to extend the rope from the housing through a second end of the first handle so that the rope is configured to be used in a rope jumping maneuver.

A jump rope device providing a retractable, length adjustable rope includes a first handle, which is tubular, a second handle, a housing that defines an interior space, and a rope. The housing is coupled a first end of the first handle so that the first handle is fluidically coupled to the interior space. A retractor is coupled to the housing and is positioned in the interior space. The rope is coupled to and extends between the second handle and the retractor. The retractor is operationally coupled to the rope so that the retractor is positioned to selectively retract the rope into the interior space. The second handle is configured to be grasped in a hand of a user to extend the rope from the housing through a second end of the first handle so that the rope is configured to be used in a rope jumping maneuver.

An adapter assembly for releasably connecting an accessory connector to an exercise rope is provided. The assembly comprises a connection part being formed by a first portion and a second portion, each having a bottom end and top end, wherein the first and the second portion of the connection part forms, at its bottom end, a cavity configured to receive an end portion of said rope, and wherein the top end of the connection part is configured to releasably connect the accessory connector.

A jump rope device providing a retractable, length adjustable rope includes a first handle, which is tubular, a second handle, a housing that defines an interior space, and a rope. The housing is coupled a first end of the first handle so that the first handle is fluidically coupled to the interior space. A retractor is coupled to the housing and is positioned in the interior space. The rope is coupled to and extends between the second handle and the retractor. The retractor is operationally coupled to the rope so that the retractor is positioned to selectively retract the rope into the interior space. The second handle is configured to be grasped in a hand of a user to extend the rope from the housing through a second end of the first handle so that the rope is configured to be used in a rope jumping maneuver.

A jump rope device providing a retractable, length adjustable rope includes a first handle, which is tubular, a second handle, a housing that defines an interior space, and a rope. The housing is coupled a first end of the first handle so that the first handle is fluidically coupled to the interior space. A retractor is coupled to the housing and is positioned in the interior space. The rope is coupled to and extends between the second handle and the retractor. The retractor is operationally coupled to the rope so that the retractor is positioned to selectively retract the rope into the interior space. The second handle is configured to be grasped in a hand of a user to extend the rope from the housing through a second end of the first handle so that the rope is configured to be used in a rope jumping maneuver.

A jump counting method for jump rope is provided. The jump counting method comprises: S1, obtaining an original video data of a jump rope movement, and extracting an audio data and an image data from the original video data; S2, calculating the number of jumps of the rope jumper according to an audio information and an image information extracted from the audio data and the image data; and S3, outputting and displaying the calculation result.

A jump counting method for jump rope is provided. The jump counting method comprises: S1, obtaining an original video data of a jump rope movement, and extracting an audio data and an image data from the original video data; S2, calculating the number of jumps of the rope jumper according to an audio information and an image information extracted from the audio data and the image data; and S3, outputting and displaying the calculation result.

An abdominal exercise device with a stable rolling platform, a pair of handles, and four roller assemblies. In addition to conventional roller exercises, the user may place toes or feet on the stable platform and push or pull the device. The device has attachment features on the handle and platform that permit one or more adjustable elastic cords to be temporarily attached to the exercise device while the device is pushed or pulled relative to the user's body. Variable resistance cords are provided which have a plurality of stop elements to permit the user to adjust the effective resistance of the elastic cords by temporarily securing selected stop elements to the device. In one example, the stop elements have internal tapered plugs and external tapered covers over the tapered plugs; so that the stop elements may nest in tapered receptacles on the device.

A fitness-training device; the fitness-training device is embedded within a graspable handle of an exercise apparatus and may include a heart rate detector, a repetitive motion counter, and indicators to indicate the heart rate, and repetitive motion count during an exercise activity. The fitness-training device may be incorporated in a wide range of sports and exercise equipment. A version of the fitness-training device arranged as a jump rope is disclosed herein.

A fitness-training device; the fitness-training device is embedded within a graspable handle of an exercise apparatus and may include a heart rate detector, a repetitive motion counter, and indicators to indicate the heart rate, and repetitive motion count during an exercise activity. The fitness-training device may be incorporated in a wide range of sports and exercise equipment. A version of the fitness-training device arranged as a jump rope is disclosed herein.