Body exercisers, usable in a plurality of modifications, encouraging exercising on sports training devices through users' emotional stimulation and intended for group exercising, games and team contests. Prior art training devices and/or any modifications of prior art training devices are used as components of a whole training device assembly, comprising: supporting resilient elements; supporting structure including a number of radially arranged and rigidly interconnected cantilever beams; training devices, each mounted on one of said radially arranged cantilever beams; an indicator of team actions' efficiency, mounted on said rigid supporting structure, visualizing the team's work quality: the velocity and the amplitude of participants' movements, and the coordination of team members' actions.