Pain Management / Practitioner article疼痛管理 · 医师专栏

Screen Height and How Often to Stand Up — What DOSH States About the Desk and the Breaks

屏幕多高、多久起身一次?DOSH 对桌子与休息写明的标准

What Malaysia's DOSH guidelines state: the monitor directly in front, at arm's length (45 cm to 70 cm), with the top usable line at a height where the neck is straight, and below eye height for progressive lenses; for typing, a work surface about 30 to 50 mm below sitting elbow height with the shoulders relaxed; the chair set so the thighs are parallel to the ground and both feet flat, with a footrest as the last resort. How often to get up: DOSH's case studies recommend a one-minute standing break after 30 minutes of sitting, and a registered practitioner at CUHK's School of Chinese Medicine recommends changing position at least every 45 minutes; plus the 20/20/20 rule and the purpose the guideline states for it. This part is the standard and a table to check your desk against, not treatment advice. Why sitting still aches is part 1; the air-conditioning is part 3; when to see a doctor is part 4.
马来西亚 DOSH 的指引写明:屏幕放正前方、距离一个手臂长(45 到 70 厘米)、最上面可用的一行放在颈部能保持挺直的高度;戴渐进镜片的人放在视线以下;打字时桌面比坐姿手肘高度低约 30 到 50 毫米,肩膀放松;椅子调到大腿与地面平行、双脚平放,脚踏是最后的手段。多久起身一次:DOSH 案例部分建议每坐 30 分钟站一分钟,中大中医学院的注册中医师建议至少每 45 分钟换一次姿势;屏幕的 20/20/20 与指引写明的目的。这一篇是标准与对照表,不是治疗建议。久坐为什么会酸在第 1 篇,冷气直吹在第 3 篇,什么时候要先看医生在第 4 篇。
Part 2 of 4 in the desk-work neck and shoulder series. Part 1 is why sitting still aches; part 3 is the air-conditioning; part 4 is when to see a doctor first.

"How high should the screen be, and how often should I get up?" They are questions that come up often, and both have a public standard to check against.

This part does one thing: it sets out what Malaysia's Department of Occupational Safety and Health (DOSH) states about the desk and the breaks. What follows is the occupational-safety guideline's standard, not treatment advice; its use is checking your own desk against.

The short version

  • The screen: DOSH puts the monitor directly in front of you, at arm's length (45 cm to 70 cm), its top usable line at a height where the neck is straight.
  • Elbows and feet: for typing, DOSH puts the work surface about 30 to 50 mm below sitting elbow height, shoulders relaxed rather than shrugged, and the chair set so the thighs are parallel to the ground and both feet flat.
  • How often to get up: DOSH's case studies recommend a one-minute standing break after 30 minutes of sitting; a registered practitioner at CUHK's School of Chinese Medicine recommends changing position at least every 45 minutes — the two numbers are close.
  • Screen breaks: DOSH's 20/20/20 — every 20 minutes, look at something at least 20 feet away, for at least 20 seconds; the guideline states the purpose is to change the focus of the eyes.
  • "Moving" here means a habit, not an exercise; movements aimed at the neck or lower back are taught by a professional who has examined you.

First, the things that cannot wait

Chest pain that feels tight or squeezing, or chest pain spreading to your arms, neck or jaw — call 999 now, or go to the nearest hospital emergency department. The NHS heart attack page states a heart attack happens when blood flow to the heart is blocked, and lists both chest pains among its reasons to call 999. This is an emergency, not a consultation booking.

Persistent numbness or weakness in the arm or fingers — get urgent help. The NHS lists "pins and needles that do not go away" and "no feeling in your arm or shoulder" among the reasons to get urgent help.

The full list is in part 4.

A note: this section is general information only. For conditions like these, follow your doctor's diagnosis and treatment, and seek medical attention when you need it.

I. DOSH's workstation standards: screen, elbows, feet

An empty workstation: screen, keyboard, chair and footrest
  • Screen: DOSH's steps are to place the monitor directly in front of you, at arm's length (45 cm to 70 cm), with its top usable line at a height where the neck is straight — at eye height for single-prescription glasses or contacts, below eye height for bifocal, trifocal or progressive lenses.
  • Laptops: DOSH notes a laptop's built-in screen is typically lower than eye level; for prolonged use, an external keyboard, mouse and monitor should be provided.
  • Elbows and desk: DOSH states that a seated worker normally prefers both hands at roughly elbow level or slightly lower, and that for typing the work surface should be about 30 to 50 mm below sitting elbow height, so the fingers type at around elbow height with the shoulders relaxed, not hunched or shrugged. In DOSH's own case illustration, the improved position has the hand at a 90-degree angle and the shoulder relaxed.
  • Feet: DOSH's step is to adjust the chair so the thighs are parallel to the ground with both feet flat on the floor. A chair set too high presses on the thighs, and DOSH writes the footrest down as a last resort, for when the chair cannot be lowered.
  • What a screen set too high or too low does: DOSH's risk table files it under "awkward posture", whose potential symptoms include neck pain and shoulder pain.

💡 Remember: these numbers are DOSH's standards for employers and employees. Wherever your desk does not match is information worth giving at the consultation.

II. How often to get up: one table

Someone standing at an office window holding a mug

The table below sets the two public accounts side by side. The registered practitioner at the Chinese University of Hong Kong's School of Chinese Medicine gives this reason: holding one posture for a long time has an adverse effect on the joints of the cervical spine, and when the body stays still for long the neck and shoulder muscles and ligaments must work harder to hold the posture, their blood supply also restricted by the lack of movement.

SituationWhat the public guidance saysUsual practiceWhen to see a doctor first
Sitting continuouslyDOSH's case studies: a one-minute standing break after 30 minutes of sitting. CUHK's School of Chinese Medicine: change position at least every 45 minutesStand to take calls, walk to the pantry for waterShoulder pain not improving after two weeks, neck pain not going away after a few weeks: see a doctor (part 4)
Staring at the screenDOSH lists "keeping the head still while looking at the monitor" as an example of a static posture; its 20/20/20: every 20 minutes, look at something at least 20 feet away, for at least 20 seconds; the guideline states the purpose: to change the focus of the eyes, allowing the muscles in the eyes to rest from the otherwise constant focusLook away, to the window or the end of the corridorPins and needles that do not go away, or no feeling in the arm or shoulder: get urgent help (part 4)
Working on a laptopIts screen is typically lower than eye level, and a monitor too high or too low sits under "awkward posture" in DOSH's risk table; for prolonged use, an external keyboard, mouse and monitor; minimise use on public transport and in vehiclesDOSH's own display-screen case study made two changes: the screen raised a little on a ream of paper, and the keyboard and mouse moved to a keyboard tray under the deskAs above
After work: phone on the sofa, laptop in bedNHS: do not keep your neck in the same position for a long time. DOSH lists continuously holding a phone or tablet as a static postureChange seat and position at the end of each episodeNight pain that wakes you and keeps worsening: see a doctor first (part 4)

DOSH calls things like answering the telephone or a discussion "productive rest", because they change the posture and rest the muscles. As for movements aimed at the neck or lower back, do not follow online videos on your own; the NHS shoulder-pain page says it plainly: do not make up your own strenuous exercises.

⚠️ A safety note: DOSH wrote "change position, stand up and move around" into the guideline; exercise instruction comes from a professional who has examined you. TCM and Western medicine complement each other, it is not a choice between them, and separating "the ache I always have" from "numbness or weakness that is new" matters — the second is not a posture problem, and part 4 covers it.

The words in this part

  • Static posture (静态姿势) — DOSH's term: one posture held with almost no movement for a long period. The full definition is in part 1.
  • Awkward posture (不良姿势) — a group in DOSH's risk table; a monitor set too high or too low is filed here.
  • 20/20/20 — DOSH's break rule for screen work: every 20 minutes, look at something at least 20 feet away, for at least 20 seconds.
  • Productive rest (有产出的休息) — DOSH's term for work that changes the posture and rests the muscles, such as answering telephones or a discussion.

Frequently asked

Is a standing desk useful? DOSH's position is not "standing beats sitting" but "change". The Seating at Work guidelines: sitting for long periods can lead to discomfort and may result in long-term health problems, so employees need the opportunity to change position, stand up and move around; the short breaks it describes include switching from seated work to standing work. The Standing at Work guidelines say: standing is a natural human posture and by itself poses no particular health hazard, but prolonged standing at work can lead to ergonomic risk factors that affect health. Where a standing desk fits is a matter of those two sentences.

The other three parts

👉 If you are not sure "the desk is set up as advised and my neck and shoulders still ache — where does this go next", you are welcome to bring it to an online consultation with HansMed, where a practitioner registered under the T&CM Act 2016 can assess it; if anything in "First, the things that cannot wait" above or in part 4 applies, see a doctor first. In-person consultations are coming soon.

Sit with a licensed TCM practitioner from wherever you are.

HansMed Modern TCM

For general wellness education only — not medical advice. Consult a registered TCM practitioner for personal guidance.

Sources

  • Department of Occupational Safety and Health Malaysia, Guidelines on Occupational Safety and Health for Seating at Work 2024 — https://dosh.gov.my/wp-content/uploads/2025/12/On-Occupational-Safety-And-Health-For-Seating-At-Work-2024-kecik.pdf
  • Department of Occupational Safety and Health Malaysia, Guidelines on Occupational Safety and Health for Working with Display Screen Equipment 2024 — https://dosh.gov.my/wp-content/uploads/2025/01/GUIDELINES-ON-OSH-FOR-DSE_Full_21Nov.pdf
  • Department of Occupational Safety and Health Malaysia, Guidelines on Occupational Safety and Health for Standing at Work 2024 — https://dosh.gov.my/wp-content/uploads/2025/01/GUIDELINES-ON-OCCUPATIONAL-SAFETY-AND-HEALTH-FOR-STANDING-AT-WORK-2024.pdf
  • NHS, Neck pain, page last reviewed 27 April 2023 — https://www.nhs.uk/symptoms/neck-pain-and-stiff-neck/
  • NHS, Shoulder pain, page last reviewed 22 May 2023 — https://www.nhs.uk/symptoms/shoulder-pain/
  • NHS, Heart attack, page last reviewed 31 March 2026 — https://www.nhs.uk/conditions/heart-attack/
  • Chinese University of Hong Kong, School of Chinese Medicine, "Baduanjin for neck and shoulder pain", Chung Kiu Lam (registered TCM practitioner), Sky Post column 1 December 2016 — https://www.scm.cuhk.edu.hk/zh-tw/news-and-literature/articles/articles-skypost-list/333-2016-12-01/
本文是「久坐办公肩颈酸痛」系列的第 2 篇,共 4 篇。第 1 篇讲久坐为什么会酸,第 3 篇讲冷气直吹,第 4 篇讲什么时候要先看医生。

「屏幕到底要多高?多久该起身一次?」这是不少读者常问的两个问题,而它们都有公开标准可查。

这一篇只做一件事:把马来西亚职业安全与卫生局(DOSH)对桌子与休息写明的标准列出来。以下写的是职业安全指引的标准,不是治疗建议,用处是让您对照自己的桌子。

一分钟看完

  • 屏幕:DOSH 的做法是放在正前方、距离一个手臂长(45 到 70 厘米),最上面可用的一行放在颈部能保持挺直的高度。
  • 手肘与脚:DOSH 说打字时桌面应比坐姿手肘高度低约 30 到 50 毫米,肩膀放松而不是耸起;椅子调到大腿与地面平行、双脚平放。
  • 多久起身:DOSH 的案例部分建议每坐 30 分钟站起来一分钟;中大中医学院的注册中医师建议至少每 45 分钟换一次姿势。两个数字相差不远。
  • 屏幕休息:DOSH 的 20/20/20——每 20 分钟看向至少 20 英尺外的东西,至少 20 秒;指引写明目的是改变眼睛的对焦。
  • 这里说的「动」是习惯,不是运动;针对颈椎或腰椎的动作,由检查过您的专业人员来教。

先说不能等的几件事

胸口发紧或疼痛,或胸痛蔓延到手臂、颈部或下巴——请立刻拨打 999,或前往最近的医院急诊部。NHS 的心脏病发作页面写明,心脏病发作是流向心脏的血流被阻断,并把这两种胸痛列为要立刻拨打 999 的情况。这是急症,不要先安排问诊。

手臂或手指持续麻木、无力——请马上求医。NHS 把「持续的麻或刺痛」与「手臂或肩膀失去感觉」列为要马上求医的情况。

完整的清单在第 4 篇。

小提醒:本段仅为一般知识说明。相关情况请以西医的诊断与治疗为主,并在需要时及时就医。

一、DOSH 的工作站标准:屏幕、手肘、脚

空着的办公桌:屏幕、键盘、椅子和脚踏
  • 屏幕:DOSH 的做法是把屏幕放在正前方,距离一个手臂长(45 到 70 厘米),屏幕最上面可用的一行放在颈部能保持挺直的高度。戴单焦距眼镜或隐形眼镜的人,屏幕放在视线高度;戴双焦、三焦或渐进镜片的人,放在视线以下。
  • 手提电脑:DOSH 指出手提电脑的屏幕通常低于视线;长时间使用时,应配外接键盘、鼠标和屏幕。
  • 手肘与桌面:DOSH 说,坐着工作时一般偏好的是双手大约在手肘高度或略低;打字时,桌面应比坐姿手肘高度低约 30 到 50 毫米,让手指在手肘高度打字、肩膀放松而不是耸起。DOSH 的案例说明里,改善后的姿势是手部呈 90 度角、肩膀放松。
  • 脚:指引的做法是把椅子高度调到大腿与地面平行、双脚平放地上。椅子太高会压到大腿;椅子降不下来时,才用脚踏——DOSH 把脚踏写成最后的手段。
  • 屏幕太高或太低会怎样:DOSH 的风险表把它列在「不良姿势」一栏,这一栏对应的可能症状包括颈痛、肩痛。

💡 记住:这些数字是 DOSH 给雇主与员工的标准。对不上的地方,就是值得在问诊时说明的资讯。

二、多久起身一次:一张表看懂

一个人端着杯子站在办公室窗前

下面这张表把两套公开说法并排放好。香港中文大学中医学院那位注册中医师写的理由是:长时间保持同一姿势,对颈椎关节也会造成不良影响;长时间不动时,颈肩部的肌肉与韧带需要加大工作量来维持姿势,血液供养也因缺乏运动而受限。

情况公开指引的说法一般做法什么时候先看医生
连续坐着DOSH 案例部分:每坐 30 分钟起身一分钟。中大中医学院:至少每 45 分钟换一次姿势站着接电话、走去 pantry 倒水肩痛超过两周没好转、颈痛几周不退:看医生(第 4 篇)
盯着屏幕DOSH 把「看屏幕时头部维持不动」列为静态姿势的例子;它的 20/20/20:每 20 分钟看向至少 20 英尺外的东西,至少 20 秒;指引写明这样做的目的:改变眼睛的对焦,让眼部肌肉从原本持续不变的定焦中得到休息把视线移到窗外或走廊尽头手臂或肩膀持续发麻或失去感觉:马上求医(第 4 篇)
用手提电脑屏幕通常低于视线,而屏幕太高或太低属 DOSH 风险表的「不良姿势」;长时间用应接外接键盘、鼠标、屏幕;尽量不在公共交通与车上用DOSH 屏幕设备案例里的做法:用一叠纸把屏幕垫高一点,键盘与鼠标移到桌面下的键盘托盘同上
下班后:沙发滑手机、床上用手提电脑NHS:不要让颈部长时间维持同一姿势。DOSH 把长时间握着手机、平板列为静态姿势看完一集就换个地方、换个姿势夜间痛醒且持续加重:先就医(第 4 篇)

DOSH 把接电话、和同事讨论这类事叫做「有产出的休息」,因为它让姿势换了、肌肉歇了。至于针对颈椎或腰椎的动作,请不要照着网络影片自行做;NHS 的肩痛页面也写得直接:不要自创吃力的运动。

⚠️ 安全提醒:DOSH 把「换姿势、站起来、走动」写进了指引;动作教学,则由检查过您的专业人员来给。中医与西医是互相补位的关系,不是二选一——把「一直有的酸痛」和「新出现的麻或无力」分开看很重要,后者不属于姿势问题的范围,见第 4 篇。

这篇出现的几个词

  • 静态姿势 static posture——DOSH 的用词:同一个姿势几乎不动地维持很长一段时间。完整的定义在第 1 篇。
  • 不良姿势 awkward posture——DOSH 风险表的一栏,屏幕太高或太低归在这里。
  • 20/20/20——DOSH 给屏幕工作的休息规则:每 20 分钟看向至少 20 英尺外的东西,至少 20 秒。
  • 有产出的休息 productive rest——DOSH 的用词:让姿势换了、肌肉歇了的工作,例如接电话或和同事讨论。

常见问题

站立办公桌有用吗? DOSH 的立场不是「站比坐好」,而是「换」。《坐姿工作指引》写明:长时间坐着可能造成不适,甚至长期健康问题,所以员工要有机会换姿势、站起来、走动;它说的短暂休息,也包括从坐着工作换成站着工作。《站姿工作指引》则说:站是自然的姿势,本身没有特别的健康危害,但长时间站着工作会带来影响健康的人体工学风险。站立桌落在哪一边,看的就是这两句。

这个系列的另外三篇

👉 如果您不确定「桌子都照着调了,肩颈还是酸,下一步该往哪里走」,欢迎透过汉方中医的线上问诊,由依 2016 年 T&CM 法令注册的医师为您评估;若有本文「先说不能等的几件事」或第 4 篇列出的情况,请先就医。线下亲诊服务即将推出。

无论身在何处,与持证中医师对坐。

汉方现代中医

本内容仅供健康知识分享,不构成医疗建议。如需个人化建议,请咨询注册中医师。

资料来源

  • 马来西亚职业安全与卫生局,《2024 年坐姿工作职业安全与卫生指引》 — https://dosh.gov.my/wp-content/uploads/2025/12/On-Occupational-Safety-And-Health-For-Seating-At-Work-2024-kecik.pdf
  • 马来西亚职业安全与卫生局,《2024 年显示屏设备工作职业安全与卫生指引》 — https://dosh.gov.my/wp-content/uploads/2025/01/GUIDELINES-ON-OSH-FOR-DSE_Full_21Nov.pdf
  • 马来西亚职业安全与卫生局,《2024 年站姿工作职业安全与卫生指引》 — https://dosh.gov.my/wp-content/uploads/2025/01/GUIDELINES-ON-OCCUPATIONAL-SAFETY-AND-HEALTH-FOR-STANDING-AT-WORK-2024.pdf
  • NHS,Neck pain,页面最后审阅 2023 年 4 月 27 日 — https://www.nhs.uk/symptoms/neck-pain-and-stiff-neck/
  • NHS,Shoulder pain,页面最后审阅 2023 年 5 月 22 日 — https://www.nhs.uk/symptoms/shoulder-pain/
  • NHS,Heart attack,页面最后审阅 2026 年 3 月 31 日 — https://www.nhs.uk/conditions/heart-attack/
  • 香港中文大学中医学院,〈八段锦纾缓颈肩痛〉,钟侨霖博士(注册中医师),晴报专栏 2016 年 12 月 1 日 — https://www.scm.cuhk.edu.hk/zh-tw/news-and-literature/articles/articles-skypost-list/333-2016-12-01/
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