A wetsuit for aquatic activities may include a wetsuit material having a first surface and an opposite second surface. The wetsuit comprises one or more sipes on the first surface that extend from an upper portion of a chest region of the wetsuit to a lateral portion of the chest region of the wetsuit.

A resistance kickboard attachment is disclosed. When attached to a kickboard, the resistance kickboard attachment adds resistance while swimming with the kickboard. The resistance kickboard attachment includes a resistance pocket, with variable resistance provided by an adjustment of a rear aperture of the resistance pocket. The resistance kickboard attachment attaches to the kickboard with a transverse and a longitudinal strap. The transverse strap includes an adjustment on either side of the longitudinal strap which allows the longitudinal strap to be centered on the kickboard.

A swim fin may include a foot pocket configured to receive a foot of a swimmer and a fin blade extending from the foot pocket. The fin blade may be relatively stiff and flex about a hinge region proximate the foot pocket. Fin rails may extend along the lateral edges of the fin blade. The fin rails may include a fin spine comprising a plurality of fin spine segments joined in linear configuration. The swim fin may be configured to provide a swim fin with predetermined hydrodynamic characteristics. The swim fin may flex within a maximum angle of attack that may be variable and dynamically changed, within the predetermined maximum attack angle range, as a function of the kicking force generated by a swimmer during a kicking cycle.

A swimming enhancement device has a frame and a push bar pivotably coupled to the rear portion of the frame. A left end is rotatably coupled to the left portion of the push bar and a left foot pad is pivotably coupled to the left end. A right end is rotatably coupled to the right portion of the push bar and a right foot pad is pivotably coupled to the right end. A propulsion fin is attached to the push bar or to a tail bar distal end of the push bar. A receiver is movably coupled to the front portion of the frame. A body coupling device is attached to or formed as part of the receiver. The body coupling device is configured to removably attach to a portion of a user's body or be held by the user.

A swimming enhancement device has a frame and a push bar pivotably coupled to the rear portion of the frame. A left end is rotatably coupled to the left portion of the push bar and a left foot pad is pivotably coupled to the left end. A right end is rotatably coupled to the right portion of the push bar and a right foot pad is pivotably coupled to the right end. A propulsion fin is attached to the push bar or to a tail bar distal end of the push bar. A receiver is movably coupled to the front portion of the frame. A body coupling device is attached to or formed as part of the receiver. The body coupling device is configured to removably attach to a portion of a user's body or be held by the user.

An underwater recreation system for diving instruction and method of its use. The method includes providing a series of learning steps with diving techniques and instructions to practice at incrementally deeper depths and providing a surface floating depth limitation device that restricts the learning user to the particular maximum depth of their learning step. The apparatus for carrying out the method of diving instruction includes a surface floating depth limitation device with the means to connect to the breathing hose of a surface supplied air supply.

An improved structure of swimming equipment includes a swim fin shoe body, a holder, an assembling slot and a straight swim fin board. Two ends of the swim fin shoe body are provided with a tip and a heel respectively. The tip of the swim fin shoe body extends at an angle towards the front and underside of the swim fin shoe body to form the holder, and the front end of the holder is provided with the assembling slot. Two ends of the straight swim fin board are provided with a paddling section and a detachable assembling section assembled in the assembling slot. The assembling section and paddling section form a straight pattern jointly, so that the straight swim fin board tilts towards the front and underside of the swim fin shoe body along with the holder.

Provided is a swimming assistance apparatus with an ICT function. The swimming assistance apparatus includes: a body part made of a material which floats on water or having a hollow tube which floats on water; a fitting hole formed in the body part and defined to penetrate through the body part to surround a part of a user's body; a cut part defined on at least one side of a wall of the fitting hole; and a sensor unit for measuring at least one of the user's posture information, work rate information and bio-information, so that the user's body floats on water by buoyancy of the body part when the user swims in a state where a part of the user's body is inserted into the fitting hole.

Provided is a swimming assistance apparatus with an ICT function. The swimming assistance apparatus includes: a body part made of a material which floats on water or having a hollow tube which floats on water; a fitting hole formed in the body part and defined to penetrate through the body part to surround a part of a user's body; a cut part defined on at least one side of a wall of the fitting hole; and a sensor unit for measuring at least one of the user's posture information, work rate information and bio-information, so that the user's body floats on water by buoyancy of the body part when the user swims in a state where a part of the user's body is inserted into the fitting hole.

The present invention provides a strap for securing a garment/article (e.g. swimming goggles) to a wearer's/user's body. The strap comprises a first portion comprising a tensioner end including a tensioner having an attachment portion. The attachment portion is for attachment to the tensioner end. The strap further comprises a second portion having indicia provided along at least a part of its length. In use, the second portion passes through the tensioner and the tensioner frame defines a window in which at least one of the indicia on the second portion is visible.