This document provides information about shift work presented by Khalil Hussain. It defines shift work as employment that provides services 24 hours a day by having different sets of employees work in relays. Common shift types include day, night, and split shifts that are typically 9 hours long. Shift work can provide benefits like flexibility but also health issues due to disruptions to circadian rhythms. Shift work sleep disorder is discussed as a circadian rhythm disorder with risks like insomnia, digestive issues, and increased heart disease for night workers. Treatments mentioned include light therapy, melatonin, alertness medications, and optimized sleep/wake schedules.

1. Subject: Occupational Health and
Safety Ergonomics
Presentation Topic: Shift Work
Presented By: Khalil Hussain
MSc(Safety, Health And Environment)
University Of Engineering And Technology Lahore
Pakistan
Department Of Chemical Engineering
Dated:01-10-2019

3. What is Shift Work?

4. What is Shift Work?
Shift work is an employment practice
designed to make use of, or provide service
across, all 24 hours of the clock each day of
the week (often abbreviated as 24/7)

5. What is Shift Work?
• Employees working in relays; that is to say, one
person or relay or squad of employees does a
spell of workupon a process and upon that same
process is immediately followed by another
employee or relay or squad of employees doing
a spell of work for something like a similar
number of hours, but not necessarily for the
same number”.
By HR

6. What is Shift Work?
Shift work is kind of work where specific
work is handled in shifts by different sets of
the crew working in shift relay, which is
how the work gets 24 hours exposure and
coverage. For certain time-sensitive tasks,
such practices is beneficial in terms of
employer’s perspectives.

7. TYPES OF WORK SHIFTS
It can be day shift, night shift, noon shift and
the common time allocated is 9 hours.
• Some of the types of work shifts are,
• Fixed Shifts-----long hour
• Split Shifts------12hour
• Irregular Shifts----part Time etc
• Rotating Shifts----Morning/Evening/Night

8. • For the employee, it can mean liberty and convenience. However, it
can have many negative impacts too. Most of the bad impacts on
employees are related to health. So here are a few advantages and
disadvantages of Working in Shifts.
• Let’s distinguish to contemplate good and bad effects of shift working
through the points mentioned below

9. 1. Convenience
2. Reduced amount of working hours
3. Training prospects
4. Avoid peak hours
5. Avoiding peak hours of gyms or cinema
6. No restriction of pushing works for weekend
7. Flexibility

10. Shift Work Disorders (SWD)
A routine life disturbance of workers involving in shift
routines

11. Shift work Disorders (SWD)
1. Abnormal routine
2. Shift inequality
3. Work imbalance
4. Safety
5. Health issues
6. Conflicts with family
7. Poor caution
8. Accessing food
9. Boredom
10. Low productivity

13. Dr. Jockers
Dr. David Jockers ,a doctor of natural medicine, functional
nutritionist and corrective care chiropractor. He currently owns and
operates Exodus Health Center in Kennesaw, Georgia.
He is the founder of DrJockers.com, a website designed to empower
people with science based solutions to improve their
health. DrJockers.com has gotten over 1 million monthly page
views and is considered one of the most well researched and easy to
read health websites in the world. Dr Jockers work has been
published in various popular media outlets including ABC, Fox
News, The Hallmark Channel – Home and Family and the Dr Oz
Show.

14. EDUCATION:
2017 DNM – Doctor of Natural Medicine University of
Natural Medicine
2008 DC – Doctorate of Chiropractic Life
University
2008 MS – Exercise and Sport Science Life
University
2004 BA – Physical Education University of
North Florida

17. Shift work and injuries

19. Shift work sleep disorder
(SWSD)

20. SWSD Associated health risks
• Circadian rhythm sleep disorders (CRSD) are a family
of sleep disorders which affect the timing of sleep
• insomnia
• night workers have an increased incidence of heart disease,
digestive disorders.
• Study:There have been many studies suggesting health
risks associated with shift work. For example, a 2007 study
led by the IARC (International Agency for Research on
Cancer) showed that shiftwork has been associated with
cancer.
• mental disorders like depression or other mood issues

22. CRSD Types (optional)

25. • Prescribed sleep/wake scheduling
Experts agree that there is no such thing as an "ideal" night work
schedule, but some schedules may be better than others.
• Bright light treatment
The light-dark cycle is the most important environmental time
cue for entraining circadian rhythms of most species,
including humans, and bright artificial light exposure has
been developed as a method to improve circadian
adaptation in night workers.
• Melatonin treatment
Melatonin is a hormone secreted by the pineal gland in
darkness, normally at night. Its production is suppressed by
light exposure,[25] principally blue light around 460 to
480 nm. Light restriction, or dark therapy, in the hours
before bedtime allows its production.

26. • Medications that promote alertness
Caffeine is the most widely used alerting drug in the world
and has been shown to improve alertness in simulated
night work.[27] Caffeine and naps before a night shift
reduces sleepiness during the shift.

27. What is your favorite Shift?

30. References
• 1.https://drjockers.com/
• https://en.wikipedia.org/wiki/Shift_work
• www.sleepfoundation.org
• Axelsson, John; Kecklund, Göran (2016-11-01). "Health
consequences of shift work and insufficient sleep"