业主是一位健身博主，希望将自己私宅的地下室改造为健身工作室，主要用于日常训练、视频照片拍摄，偶尔对外接待健身学员。

改造前的地下室，地面、梁柱高低不平，在低矮的空间中恣意生长，没有任何的秩序，仅有的两个采光井被抛掷在角落。

这样的空间如何能与健身运动建立联系？

身体边界——女博主主要的训练内容包括基础的器械健身以及普拉提。这些运动让身体的呈现与日常的家居活动不同，我们叠合了这些运动，形成了一个近似圆拱形的柔和边界，这个动态的边界将在空间中伸展运动。

空间边界——空间中引入自由的拱形边界，隐匿原有混乱无序的结构元素，整合成连续的新边界，将身体柔和包裹。自由拱不同于明确的圆拱，它柔和混沌、难以界定。从顶到地，它的轨迹时缓时急，动态变化，模糊自然，承托身体的柔软边界。

流通渗透——不同的自由供彼此连续，纵横交错，层层叠叠，在每一个点上观测，它都呈现不同的姿态，交错的曲线切分出的实体与虚空，创造了难以捉摸的流通与渗透。

镜像延伸——镜子除了运动本身的需求，而在空间中，它将连续的自由曲线不断扩大延续，身体所在的真实空间，在虚像世界中进一步加强。原本狭小的地下室，因为镜像变成了一个宏大空间背景。

内外之间——地下室仅有的两个采光井和楼梯是与外部联系的通道，设计强化了这三个内外联系的区域，赋予它们三种颜色，形成“内嵌的庭院”空间，在封闭中创造更多的“内”“外”层次。

光影力量——两个采光井将自然光引入室内。远离采光井的区域，顶部沿边置入光带，剥离拱与顶面的联系，而自我呈现，在有限的高度最大可能让顶面上浮。为满足均匀照度的需求，顶面中部引入四条斜向灯带，充满“力量”似的侵入柔和的边界中。拱与斜线犹如柔美与力量的并置，亦犹如女性的身体与冰冷的器械的冲突呈现，他们都是健身工作室最自然的状态。

The owner, as a fitness blogger, hopes to change the basement of her private house into a fitness studio, which is mainly used for daily training, video and photo capture and occasional reception of fitness students.

Before renovation, the basement, with uneven ground, beams and columns, is left unattended in the low space. Nothing here is in order and two light wells are discarded in the corner.

How to associate such a space with fitness and exercises?

Body boundary - The female blogger specializes in training of workout on fitness equipment and Pilates. These exercises present the body in a manner different from the daily household activities. Therefore, we combine these exercises to form a soft boundary which approximates a circular arch. This dynamic boundary shall stretch out in the space.

Spatial boundary - A free arched boundary is introduced into the space to hide the original chaotic structural elements and integrate them into a continuous new boundary, thus wrapping the body softly. Different from a definite arch, a free arch is soft, chaotic and hard to define. From the top to the ground, it moves slowly and sharply, changing dynamically and blurred naturally, to bear the body's soft boundary.

Circulation and penetration - Different free curves can form a continuity with each other through crisscrossing or overlaying. Observed from different perspectives, they shall display various postures. Besides, the entity and virtuality divided by the interlaced curves can generate an elusive circulation and penetration.

Mirror extension - In addition to satisfying the demand for exercise, the mirror extends the continuous free curve in space, thus further enhancing the actual space where the body is in the virtual world. Thanks to the mirror, the basement, originally narrow, is turned into a large space background.

Inside and outside - The basement is only accessible to the outside through its two light wells and stairway. The three areas connecting the inside and outside are reinforced in the design by giving them three colors to form a space of the "embedded courtyard", which shall create more "inside" and "outside" layers within the enclosure.

Power of light and shadow - Two light wells bring natural light into the interior. In the area away from the light wells, the top edge is equipped with bands of light to detach the arch from the top surface for self-presentation, thus maximally allowing the top surface to float upward at a limited height. To realize uniform illumination, four diagonal bands of light are adopted in the central part of the top surface, which intrude into the soft boundary powerfully. Arch and diagonal lines coexist like grace and strength, indicating the conflict between the female body and the cold equipment, both of which are most natural in a fitness studio.