肾主腰脚，而三阴三阳、十二经、八脉，有贯肾络于腰脊者。劳损于肾，动伤经络，又
为风冷所侵，血气击搏，故腰痛也。阳病者，不能俯；阴病者，不能仰，阴阳俱受邪气者，
故令腰痛而不能俯仰。
《养生方·导引法》云∶伸两脚，两手指着足五指上。愈腰折不能低着，唾血、久疼愈
又云∶长伸两脚，以两手捉足五指七通。愈折腰不能低仰也。
劳伤肾气，经络既虚，或因卧湿当风，而风湿乘虚搏于肾经，与血气相击而腰痛，故云
风湿腰痛。
夫劳伤之人，肾气虚损，而肾主腰脚，其经贯肾络脊，风邪乘虚卒入肾经，故卒
然而患腰痛。
夫腰痛，皆由伤肾气所为。肾虚受于风邪，风邪停积于肾经，与血气相击，久而
不散，故久腰痛。
肾主腰脚，肾经虚则受风冷，内有积水，风水相搏，浸积于肾，肾气内着，不能宣通，
故令腰痛。其病状，身重腰冷，腹重如带五千钱，如坐于水，形状如水，不渴，小便自利，
饮食如故。久久变为水病，肾湿故也。
腰者，谓卒然伤损于腰而致痛也。此由损血搏于背脊所为，久不已，令人气息乏
少，面无颜色，损肾故也。
肾气不足，受风邪之所为也。劳伤则肾虚，虚则受于风冷，风冷与真气交争，故腰脚疼
肝主筋而藏血。血为阴，气为阳。阳气，精则养神，柔则养筋。阴阳和同，则气血调适
，共相荣养也，邪不能伤。若虚则受风，风寒搏于脊膂之筋，冷则挛急，故令背偻。
肾脏主管腰部和下肢，而三阴经、三阳经、十二正经及奇经八脉中，有贯穿肾脏并联络腰脊的经络。若因劳累损伤肾脏，导致经络受损，再加上风冷邪气侵袭，气血相互搏击，从而引发腰痛。阳气受病者，身体不能前俯；阴气受病者，身体不能后仰；若阴阳二经受邪，就会导致腰痛且无法进行俯仰动作。
《养生方·导引法》记载：伸直双腿，双手手指触碰脚趾尖端。此法可治愈腰部折断不能低头的症状，以及咯血、长期疼痛等病症。又说：双腿长伸，用双手握住脚趾七次。可治愈腰部折断不能低头或仰身的症状。
因劳损导致肾气受伤，经络本就虚弱，如果又睡在潮湿处或直吹当风，风湿邪气便趁虚侵入并与肾经搏结，与气血相击而引发腰痛，因此称为“风湿腰痛”。
凡是劳伤之人，肾气虚损，而肾脏主管腰脚，其经络贯穿肾脏并联络脊柱，风邪乘虚突然侵入肾经，所以突然患上腰痛。
大凡腰痛，都是由损伤肾气所致。肾虚受到风邪侵袭，风邪停滞积聚在肾经，与气血相互搏击，日久不散，因此形成久治不愈的腰痛。
肾脏主管腰脚，肾经虚弱则容易感受风冷，体内若有积水，风水邪气相互搏结，浸渍于肾脏，使肾气内郁而不能宣通，从而导致腰痛。其病症表现为身体沉重、腰部发冷，腹部沉重如同系着五千枚铜钱，感觉像坐在水中，体态似水般沉重，口不渴，小便通畅正常，饮食如常。若拖延日久，会转变为水气病，这是因为肾湿的缘故。
所谓“腰折”，是指突然遭受外伤导致腰部疼痛。这是由于瘀血搏结于背脊所致，若久治不愈，会导致人气息微弱、面色无华，这是因为损伤了肾脏的缘故。
这是由肾气不足，感受风邪所致。劳伤导致肾虚，虚则易受风冷侵袭，风冷邪气与人体真气相互交争，从而导致腰脚疼痛。
肝脏主管筋脉并贮藏血液。血属于阴，气属于阳。阳气精纯则滋养精神，柔和则滋养筋脉。阴阳调和，则气血协调，共同荣养身体，邪气便不能伤害人体。若身体虚弱则易受风邪侵袭，风寒邪气搏结于脊背的筋脉，寒冷导致筋脉拘挛紧急，从而造成背部弯曲（背偻）。
The Kidney governs the waist and lower limbs. Among the Three Yin and Three Yang meridians, the Twelve Regular Meridians, and the Eight Extraordinary Vessels, there are those that penetrate the Kidney and connect to the lumbar spine. If the Kidney is damaged by overstrain, injuring the meridians, and is further invaded by Wind-Cold pathogenic factors, causing Qi and Blood to clash, then Lumbago (lower back pain) occurs. When Yang meridians are affected, the body cannot bend forward; when Yin meridians are affected, the body cannot extend backward. If both Yin and Yang meridians are afflicted by pathogenic factors, it results in lumbago with an inability to bend or extend.
The *Yangsheng Fang* (Prescriptions for Health Preservation) · *Daoyin Fa* (Guiding and Pulling Methods) states: Extend both legs, and use both hands' fingers to touch the tips of the five toes. This cures "waist fracture" where one cannot bend down, as well as hemoptysis (coughing up blood) and chronic pain. It also states: Extend both legs fully, and grasp the five toes with both hands seven times. This cures a fractured waist where one cannot bend down or extend upward.
When labor injuries damage Kidney Qi, the meridians become deficient. If one lies on dampness or exposes oneself to drafts, Damp-Wind pathogens take advantage of this deficiency to clash with the Kidney Meridian and interact with Qi and Blood, causing lumbago. Hence, it is called "Damp-Wind Lumbago."
In cases of overstrain, Kidney Qi is deficient. Since the Kidney governs the waist and lower limbs, and its meridian penetrates the Kidney and connects to the spine, Wind pathogens suddenly enter the Kidney Meridian due to deficiency, resulting in sudden onset of lumbago.
All lumbago is caused by injury to Kidney Qi. When Kidney deficiency allows Wind pathogens to invade, these pathogens accumulate in the Kidney Meridian and clash with Qi and Blood. If this persists without resolving, it leads to chronic lumbago.
The Kidney governs the waist and lower limbs. When the Kidney Meridian is deficient, it is susceptible to Wind-Cold. If there is internal accumulation of water, Water-Dampness and Wind pathogens clash and infiltrate the Kidney, causing Kidney Qi to stagnate internally without being able to circulate freely, thus inducing lumbago. The clinical manifestations include heaviness of the body and coldness of the waist, a sensation of heaviness in the abdomen as if wearing a belt of five thousand coins, feeling as though sitting in water, a shape resembling water retention, absence of thirst, normal urination, and normal appetite. If prolonged, this may transform into Edema Disease (water disease), due to Kidney Dampness.
"Waist Fracture" refers to pain in the waist caused by sudden trauma. This is due to damaged Blood clashing with the dorsal spine. If not cured for a long time, it causes shortness of breath and pallor, because the Kidney has been injured.
This condition arises from insufficient Kidney Qi and exposure to Wind pathogens. Overstrain leads to Kidney deficiency; deficiency makes one susceptible to Wind-Cold. The clash between Wind-Cold and True Qi results in pain in the waist and lower limbs.
The Liver governs the sinews and stores Blood. Blood is Yin, and Qi is Yang. Pure Yang nourishes the Spirit, while soft Yang nourishes the sinews. When Yin and Yang are harmonious, Qi and Blood are balanced and mutually nourish the body, preventing pathogenic invasion. However, if the body is deficient, it becomes susceptible to Wind. Wind-Cold clashes with the sinews of the dorsal spine; coldness causes spasms and tightness, leading to Kyphosis (hunchback/back curvature).