A4腰
释义 DEFINITION
A4腰是2016年在中国社交媒体爆红的身体挑战术语，包含两层含义：
- 字面定义：将A4纸（21cm×29.7cm）竖向放置时，腰部宽度小于21cm的体型
- 网络语境：现多用于形容极端纤细的腰围，常见于健身博主展示身材、医美机构宣传抽脂项目等场景。近年因涉及body shaming争议，使用时需注意语境。
根据清华大学2021年《社交媒体审美研究》报告显示，该词在娱乐话题中使用时68%为正面赞美，但在社会议题讨论中53%带有批判色彩。
词源故事 ETYMOLOGY
2016年3月，微博用户@全球健身中心发起#A4腰挑战#，要求参与者用竖向A4纸遮挡腰部拍照。该话题24小时内获得2.7亿阅读量，原因在于：
传播机制：
- 低门槛：办公室随处可见A4纸
- 视觉冲击：白色纸张与肌肤形成鲜明对比
- 明星效应：演员袁姗姗等晒照引发效仿
社会争议：
2016年4月，《中国青年报》批评此趋势助长畸形审美，知乎出现『为什么A4腰比反手摸脐更危险？』等深度讨论。心理学家指出，这种具体数字化的标准极易引发焦虑——毕竟连超模刘雯的腰围也有24cm。
例句：
- 正面：『健身半年终于达成A4腰成就！』（配健身房镜子自拍）
- 批判：『还在追求A4腰？看看唐代陶俑的丰腴美！』（博物馆科普文章）
DEFINITION
The A4 waist challenge went viral on Chinese social media in 2016, referring to:
- Literal meaning: Having a waist narrower than 21cm (the short side of A4 paper)
- Cultural context: Became a controversial beauty standard symbolizing extreme slimness. Similar to Western 'thigh gap' trends but with office supply humor.
Note: A4 paper dimensions (8.27"×11.69") make this standard particularly strict. Medical experts warn that less than 5% of adult women can naturally meet this without corset training or surgery.
ETYMOLOGY
The A4 waist phenomenon began in March 2016 when Weibo influencer @GlobalFitnessCenter initiated a challenge comparing waists to A4 paper. Its virality stemmed from:
Key factors:
- Office workers' easy access to A4 paper
- High-contrast visual effect against skin
- Celebrity participation like actress Yuan Shanshan
Cultural debate:
While initially playful, China Youth Daily soon criticized it as promoting unhealthy standards. Zhihu discussions pointed out the danger of quantifiable beauty metrics - even supermodel Liu Wen's waist measures 24cm. The trend declined after 2018 as body positivity movements gained momentum, though it's still referenced in fitness marketing.
Modern usage examples:
- In advertisements: "Our waist trainers help achieve A4 waist in 30 days!"
- In criticism: "Stop A4 waist obsession - real beauty has no ISO standards"