Most digital bodily games focus on the body as they use movement as input. However, they also draw the player's focus away from the body as the output occurs on visual displays, creating a divide between the physical body and the virtual world. We propose a novel approach - the ''Body as a Play Material'' - where a player uses their body as both input and output to unify the physical body and the virtual world. To showcase this approach, we designed three games where a player uses one of their hands (input) to play against the other hand (output) by loaning control over its movements to an Electrical Muscle Stimulation (EMS) system. We conducted a thematic analysis on the data obtained from a field study with 12 participants to articulate four player experience themes. We discuss our results about how participants appreciated the engagement with the variety of bodily movements for play and the ambiguity of using their body as a play material. Ultimately, our work aims to unify the physical body and the virtual world.

翻译：大多数数字身体游戏通过将运动作为输入而聚焦于身体。然而，这些游戏也将玩家的注意力从身体上移开，因为输出发生在视觉显示器上，从而在物理身体与虚拟世界之间造成割裂。我们提出了一种新颖的方法——"将身体作为游戏素材"，即玩家将身体同时用作输入和输出，以统一物理身体与虚拟世界。为展示这一方法，我们设计了三款游戏：玩家通过将其中一只手的运动控制权让渡给肌肉电刺激系统，用一只手（输入）对抗另一只手（输出）。通过对12名参与者田野调查数据的主题分析，我们提炼出四个玩家体验主题。我们讨论了参与者在游戏中如何欣赏多样化身体运动的参与感，以及将身体作为游戏素材的模糊性。最终，我们的工作致力于统一物理身体与虚拟世界。