Abstract: A computer-implemented training system includes data storage storing: (i) a first set of visual instruction materials, (ii) a second set of audio instruction materials, and (iii) a set of user data. The user data includes, for each user, (a) a first indication of a visual instruction status and (b) a second indication of an audio instruction status. Also stored is a presentation control processing arrangement configured for selecting an instruction material of the first set or the second set and causing it to be presented to a user. The presentation control processing arrangement is configured to, for a specific user, select one of (a) a visual instruction material from the first set based on the first indication for that user and (b) an audio instruction material from the second set based on the second indication for that user, and presenting the selected instruction material to the user.

Abstract: A computer-implemented training system includes data storage storing: (i) a first set of visual instruction materials, (ii) a second set of audio instruction materials, and (iii) a set of user data. The user data includes, for each user, (a) a first indication of a visual instruction status and (b) a second indication of an audio instruction status. Also stored is a presentation control processing arrangement configured for selecting an instruction material of the first set or the second set and causing it to be presented to a user. The presentation control processing arrangement is configured to, for a specific user, select one of (a) a visual instruction material from the first set based on the first indication for that user and (b) an audio instruction material from the second set based on the second indication for that user, and presenting the selected instruction material to the user.

Abstract: A computer-implemented training system includes data storage storing: (i) a first set of visual instruction materials, (ii) a second set of audio instruction materials, and (iii) a set of user data. The user data includes, for each user, (a) a first indication of a visual instruction status and (b) a second indication of an audio instruction status. Also stored is a presentation control processing arrangement configured for selecting an instruction material of the first set or the second set and causing it to be presented to a user. The presentation control processing arrangement is configured to, for a specific user, select one of (a) a visual instruction material from the first set based on the first indication for that user and (b) an audio instruction material from the second set based on the second indication for that user, and presenting the selected instruction material to the user.

Abstract: A barbell characterized by a longitudinal bar with two hand gripping portions, with sufficient spacing between gripping portions to provide clearance for the torso, head or neck, where the gripping portions are characterized by first and second diamond-like shaped exterior portions enclosing gripping windows, where the windows each contain at least one gripping bar, non-parallel to the longitudinal bar, where the first and second diamond-like portions have a first and second interior end portions which, with the intermediate region, define a cambered gripping portion wherein the gripping bars and the exterior portion of the gripping windows are designed to provide a plurality of gripping positions and angles for the user.