Abstract: Add-on type weight training devices which are designed for use with conventional barbell weight equipment, particularly in connection with specialized weight training regimes where successive, lighter weight loads are lifted until strength limits are reached. In preferred forms, the devices are provided in matched pairs, and each device includes an elongated (e.g. 4-18 inches), concavo-convex metallic gripping element with a pair of end-mounted, slotted, metallic plate-like weight members affixed to the gripping element. In use, the weight trainee positions the devices on the barbell inboard at the primary weights, with the gripping elements in direct enagement with the bar. In this fashion, the add-on devices and bar are simultaneously gripped for lifting purposes. When the trainee's strength limit is reached, the add-on devices are simply removed from the barbell and similar, lower weight add-on devices used in this same fashion.