Locals were spotted performing bizarre neck exercises by hanging from trees in a park in northern China.

The bizarre video, shot in the city of Shenyang in Liaoning Province on May 21, shows several elderly men putting their heads into a rope harness and hanging by their necks.

They then spin their legs to stretch their necks.

According to a 57-year-old man named Song Rongchun who invented this kind of workout, the workout can help treat cervical spondylosis.

However, a doctor said specific straps and equipment are needed to treat cervical spondylosis by traction, so it is better to do it under the guidance of professionals.

The video was provided by local media with permission.

最近，在辽宁沈阳兴华公园内，一些大爷大妈在大树上吊脖健身引发热议。这些锻炼者将头吊起，跟随绳索摇摆，画面甚为诡异。在他们当中，有人挂脖后会荡秋千，有人会原地扭腰，更有人挂脖跳舞，满脸享受。
此项健身运动的发明者，57岁的孙荣春称这可以治疗颈椎病，已获国家专利。但医生提醒，不能盲目采用这种方式。牵引确实是颈椎疾病的康复方法之一，其旨在通过延展颈椎周围的软组织，增大椎间空隙，以解除神经压迫和椎动脉的扭曲，缓解肌肉痉挛。不过有关方法需用到特制的牵引带和装置，并最好在专业人士指导下操作。否则容易造成颈椎内小关节错位和肌肉拉伤。 （视频由沈阳台提供）