What do we mean by shift work?
There is no specific definition of shift work in law, but it usually means: A work activity scheduled outside standard daytime hours, where there may be a handover of duty from one individual or work group to another. A pattern of work where one employee replaces another on the same job within a 24-hour period.
Standard daytime hours are considered as:
A work schedule involving an activity during the day, commonly for a period of eight hours between 7.00 am and 7.00 pm. There are usually two periods of work, one in the morning, the other in the afternoon, separated by a lunch-time break.
Work during the afternoon, night or weekend, typically with periods of the work schedule outside standard daytime hours. Extended work periods of 12 hours or more, often associated with compressing the working week; rotating hours of work; split shifts, where work periods are divided into two distinct parts with several hours break in between; overtime; standby/on-call duties.
What are the undesirable effects of shift work?
Research has shown that there can be undesirable consequences for those working shifts outside standard daytime hours, particularly those covering the night or with early morning starts. For example, shift work may result in:
Disruption of the internal body clock; fatigue; Sleeping difficulties.
Disturbed appetite and digestion; reliance on sedatives and/or stimulants; social and domestic problems, which in turn can affect performance, increase the likelihood of errors and accidents at work and might have a negative effect on health.
Disruption of the internal body clock (circadian rhythms)
By nature, humans are active and perform best during the day and need to sleep at night when performance is generally poorer. We follow this innate pattern because of an internal body clock, located in the brain which sets the daily cycle of biological activities, such as chemical and hormone release that influence body activity. For example, heart rate, blood pressure and body temperature are increased during the day. At night they are reduced, and we slow down and feel sleepy. This daily cycle is known as the circadian rhythm and explains why we eat and sleep at similar times each day. External factors or cues such as daylight, mealtimes, clocks and working hours help to regulate this internal body clock, and play an important role in keeping our bodies in step with the world around us.
Our internal body clock can change gradually, but for most people it is resistant to the abrupt changes in the sleep/wake cycle that are required by shift-work schedules or flying across time zones. This can cause our natural daily rhythms to become out of tune with those of the world around us. This is the reason why we can feel ‘out of sorts’ and less able to function to the best of our ability when we do not get enough sleep. The adjustment of our internal body clock to an abrupt change in the sleep/ wake cycle may take days or weeks. It will start to adjust body functions after a few days of shift work, but at different rates, so behaviours that rely on a regular cycle such as digestion, alertness and sleep are disturbed. The adjustment may be more successful in specialised work environments, such as submarines and oil rigs, where the effects of external cues are minimised. However, our internal body clock will never fully adjust, even for workers on permanent night shifts. Those regular night workers who change back to daytime routines during rest days will continue to suffer the consequences of a disrupted internal clock, as it attempts to reset to daylight rhythms during days off.
Sleep disturbance/loss
A consensus view by scientists who study human performance and safety is that sleep is a powerful and vital biological need. Insufficient and disturbed sleep, chronic sleep loss and being awake for prolonged periods, increases the risk of errors and accidents. Day sleep is usually lighter and shorter in duration and therefore less restorative than night sleep. It’s more often disturbed because of warmer temperatures and daytime activity such as the phone ringing, noisy children or domestic responsibilities. While we can rearrange some external cues, for example meal times, it is difficult to control all influential sleep/wake cues, particularly daylight. For example exposure to bright light at dawn after a night shift may make you less inclined to sleep.
People’s adaptability means that we can, if we need to, resist our internal body clock and function for periods with either reduced sleep or even no sleep at all. The cost of resisting this need to sleep is known as a ‘sleep debt’. The desire to recover this debt can be very hard to resist, particularly when external cues or our body’s internal body clock are driving us to sleep. Research reveals that when we are sleep deprived and/or fatigued, performance is affected and errors are more likely. This particularly applies to tasks that require:
Vigilance and monitoring; decision making; awareness;
Fast reaction time; tracking ability; memory.
Fatigue
Fatigue is the decline in mental and/or physical performance that results from prolonged exertion, lack of quality sleep or disruption of the internal body clock. The degree to which a worker is prone to fatigue is also related to workload. For example, work that requires constant attention, is machine paced, complex or monotonous will increase the risk of fatigue. A poor balance between the demands of work and the time provided for rest and recovery, resulting for example, from poorly designed shift-work schedules and long working hours is likely to result in chronic fatigue. Levels of fatigue are also affected by personal factors such as home life or individual characteristics. You will need to be aware of these factors when you carry out your risk assessment, but you are not expected to control them. The consequences of fatigue include reduced alertness, poor and slow perception and sleepiness. Chronic fatigue has also been associated with a number of long-term health problems.
Errors, productivity and accidents
For shift working to be financially viable, you need to maintain a satisfactory level of productivity and safety. Fatigued shift workers may perform less well than those working standard daytime hours, especially during periods of low alertness. The consequences of this could range from relatively minor events to serious accidents. Take both ends of this spectrum into account when you are assessing the cost- effectiveness of shift working as the social and financial costs of frequent minor events may equate over time to those associated with a rarely occurring serious accident.
Health effects
As well as chronic fatigue, there is some evidence associating long-term exposure to shift work and the following ill health effects:
Gastrointestinal problems such as indigestion, abdominal pain, constipation, chronic gastritis and peptic ulcers;
Cardiovascular problems such as hypertension, coronary heart disease; increased susceptibility to minor illnesses such as colds, flu and gastroenteritis. Shift work may also exacerbate existing health problems such as diabetes, asthma, epilepsy and psychiatric illness. Moreover, the effectiveness and potential toxicity of some drugs may var depending on the time they are taken as the dose- response patterns of many drugs follow a circadian pattern.
Shift workers, particularly those who work at night, may be at risk of ill health because shift work can disrupt our body clock (by interfering with the production of hormones by the body), disturb sleep and cause fatigue. In recognition of the particular risks to night workers, the WTR include aright for these workers to receive free health assessments. Individual and social factors may also contribute to the risk of ill health effects. Consequently, not everyone will experience or have the same pattern or degree of health problems. An individual’s attitude, behaviour, lifestyle, age, sex and family history plus the conditions they work in, will all play a part.
Disruption of family and social life
A happy social and domestic life is an important foundation for health and well- being. The amount and quality of time spent with family and friends can, however, be affected by unusual patterns of work. A worker who experiences a disrupted social or domestic life may feel isolated, moody or depressed, which can affect their health and performance at work. A work schedule that clashes with domestic responsibility can lead to a compromise between routines suited to work and those suited to less conflict at home. Shift workers, especially those who are primary carers, may spend more time with their family or fulfilling their domestic duties at the cost of sleep. This will result in fatigue and its consequent implications for health and safety.
Situations where you will need to consider safety issues in relation to noise include where:
There are many ways of reducing noise and noise exposure. First, think about how to remove the source of noise altogether, for example housing a noisy machine where it cannot be heard by workers. If that is not possible, investigate:
When should personal hearing protection be used?
Hearing protection should be issued to employees:
Detecting damage to hearing
If the risk assessment indicates that there is a risk to health for employees exposed to noise, they should be placed under suitable health surveillance (regular hearing checks). The Control of Noise at Work Regulations 2005 require employers to take action to prevent or reduce risks to health and safety from noise at work.
The Control of Vibration at Work Regulations 2005 says you must prevent or reduce risks from exposure to vibration at work. Follow the Assess, Control and Review model. Pay particular attention to:
Identify and assess
Construction sites have a range of different activities involving vibrating tools and machinery.
Consider:
Further information on assessing vibration exposures is available. Look at manufacturers / suppliers information and trade association or other industry databases. You can also use HSE’s vibration calculator and ready reckoner. Seek specialist help if you are unsure.
Control
Where the risks are judged to be low, simple and inexpensive controls will suffice. For higher risks, you will have to do much more to protect workers. Give priority to the greatest risks first. Prevent: Where possible think about eliminating or reducing the amount of vibration. Consider:
Even if you stop some of the risk this way, you may still do other work that can create significant vibration. Control the risk by:
Train
Tell workers about the risks from vibration and how to use the controls properly.
Review
Supervise:Ensure that controls are effective and properly used.
Maintain: Effective maintenance can make big differences to vibration levels. Loose or worn parts of tools and plant create extra vibration. Blunt, damaged or inefficient tools have increased vibration and also mean tasks can take longer, increasing exposure levels.
Monitor: Check the controls to ensure they are effective. This might mean:
Construction dust is not just a nuisance; it can seriously damage your health and some types can eventually even kill. Regularly breathing these dusts over a long time can therefore cause life- changing lung diseases.
There are three main types:
Anyone who breathes in these dusts should know the damage they can do to the lungs and airways. The main dust-related diseases affecting construction workers are:
Some lung disease, like advanced silicosis or asthma, can come on quite quickly. However, most of these diseases take a long time to develop. Dust can build up in the lungs and harm them gradually over time. The effects are often not immediately obvious. Unfortunately, by the time it is noticed the total damage done may already be serious and life changing. It may mean permanent disability and early death.
The law
The Control of Substances Hazardous to Health Regulations 2002 (COSHH) cover activities which may expose workers to construction dust. There are three key things you need to do:
Assess (the risks)
Assess the risks linked to the work and materials. Examples of high-risk tasks are listed in Table 1. High dust levels are caused by one or more of the following:
Use the following measures to control the risk. Examples of controls for common high-risk
tasks are given in Table 1.
Stop or reduce the dust
Before work starts, look at ways of stopping or reducing the amount of dust you might make. Use different materials, less powerful tools or other work methods. For example you could use:
There are two main ways of doing this:
Respiratory protective equipment (RPE)
Water or on-tool extraction may not always be appropriate or they might not reduce exposure enough. Often respiratory protection (RPE) has to be provided as well. You will need to make sure that the RPE is:
Remember: RPE is the last line of protection. If you are just relying on RPE you need to be able to justify your reasons for this.
Other controls
Depending upon the work you are doing you may have to combine these measures with other controls. Think about:
Train workers:
Review (the controls)
You may already have the right controls in place, but are they all working properly? Check the controls work by:
Maintaining equipment:
Supervising workers. Make sure they:
What’s the problem?
Manual handling injuries are part of a wider group of musculoskeletal disorders (MSDs). The term ‘musculoskeletal disorders’ includes injuries and conditions that can cause pain to the back, joints and limbs. Heavy manual labour, repetitive handling, awkward postures and previous or existing injuries or conditions are all risk factors for developing MSDs. Work may also make worse an injury which was not caused at work, such as a sports injury.
What does the law say?
The Management of Health and Safety at Work Regulations require you to assess the risks to the health and safety of your workers. Where this identifies hazardous manual handling of loads, you should also comply with the Manual Handling Operations Regulations (the Manual Handling Regulations). The Manual Handling Regulations set out a clear hierarchy of measures you must follow to prevent and manage the risks from hazardous manual handling:
Workers have duties too. They should:
Avoid hazardous manual handling
Eliminate handling the load. Can you eliminate hazardous manual handling by not moving loads, for example, by looking at whether the work could be done in a different way:
Automation or mechanisation
If handling the load cannot be avoided, consider whether the operations can be automated or mechanised to eliminate the manual part of the handling. The best time to make decisions about this is when plant or systems of work are being designed.
Assess the risks
Where you identify risks from hazardous manual handling in your workplace that cannot be avoided, you must do a manual handling risk assessment to help you decide what you need to do to manage these risks. Make sure your workforce is fully involved in the risk assessment process. Consider risks arising from:
Make sure you take account of the individual requirements of workers who may be especially at risk, for example:
What is DSE?
DSE are devices or equipment that have an alphanumeric or graphic display screen and includes display screens, laptops, touch screens and other similar devices.
What are the health risks with DSE?
Some workers may experience fatigue, eye strain, upper limb problems and backache from overuse or improper use of DSE. These problems can also be experienced from poorly designed workstations or work environments. The causes may not always be obvious and can be due to a combination of factors.
Consulting your employees on DSE
Workplaces where employees are involved in taking decisions about health and safety are safer and healthier. Collaboration with your employees helps you to manage the potential health problems associated with DSE in a practical way by:
How to control the risk
Getting comfortable
The following may help users:
Health and Safety
Well-designed workstations, Keyboards and keying in (typing)
Using a mouse
Reading the screen
Changes in activity
Breaking up long spells of DSE work helps prevent fatigue, eye strain, upper limb problems and backache. As the employer you need to plan, so users can interrupt prolonged use of
DSE with changes of activity. Organised or scheduled rest breaks may sometimes be a solution.
The following may help users:
Timing and length of changes in activity or breaks for DSE use is not set down in law and arrangements will vary depending on a particular situation. Employers are not responsible for providing breaks for the self-employed.
Portable computers
These same controls will also reduce the DSE risks associated with portable computers. However, the following may also help reduce manual handling, fatigue and postural problems: Consider potential risks from manual handling if users have to carry heavy equipment and papers.
Health and Safety
DSE user training
You must provide information, instruction and health and safety training to users to help them identify risks and safe work practices. When training users, consider explaining:
Providing eye tests and any necessary spectacles for DSE work
There is no evidence to suggest that DSE work will cause permanent damage to eyes or eyesight. Eye tests are provided to ensure users can comfortably see the screen and work effectively without visual fatigue. If a user or a potential user requests an eye test you are required to provide one. If the test shows that the user needs glasses specifically for DSE work, you must pay for a basic pair of frames and lenses.
Eye tests are not an entitlement for the self- employed. Users are entitled to further tests if DSE work is considered to cause them visual fatigue and at regular intervals after the first test. The arrangements you make to provide eye and eyesight tests can vary. For example, some employers let users arrange tests for themselves (and give the employer the bill); others prefer to send all their staff to be tested by one optician. The following may help you when setting up your arrangements:
Health and Safety
Make sure users understand what you will and won’t pay for. You only need to provide glasses for the DSE work. If users’ normal glasses are suitable for DSE work,
you don’t need to pay for them. You don’t have to pay for expensive frames or lenses.
Review
DSE assessments need to be reviewed when:
Cold environments
Hot environments
Working in the sun
Too much sunlight is harmful to your skin. It can cause skin damage including sunburn, blistering and skin ageing and in the long term can lead to an increased risk of skin cancer. Skin cancer is one of the most common forms of cancer in the UK with over 50,000 new cases every year. A tan is a sign that the skin has been damaged. The damage is caused by ultraviolet (UV) rays in sunlight.
Who is at risk?
If work keeps you outdoors for a long time your skin could be exposed to more sun than is healthy for you. You should take particular care if you have:
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