Exercise Stress Test
Medicimage / Science Photo Library
Tiredness
Julie Nicholls/science Photo Library
Caffeine Crystals
Dr Jeremy Burgess
Kismet Showing Tiredness
Peter Menzel/science Photo Library
Office Stress #10
Howard George/science Photo Library
Tired Elderly Man
Mauro Fermariello/science Photo Library
Teenage Girl Yawning
Ian Hooton/science Photo Library
Headache #8
Aj Photo/science Photo Library
Tired Hospital Nurse
Mauro Fermariello/science Photo Library
Work Related Stress
Aj Photo/science Photo Library
Sleeping Baby #6
Ian Hooton/science Photo Library
Man Doing Pull Ups #1
Microgen Images/science Photo Library
Woman In Bed Yawning
Jimmy Kets/reporters/science Photo Library
Stressed Policewoman #1
Jim Varney/science Photo Library
Drinking Wine #4
Ian Hooton/science Photo Library
Tired Woman #2
Ian Hooton/science Photo Library
Cans Containing Energy Drinks
Science Photo Library
Tired Doctor #1
Jim Varney/science Photo Library
Office Stress #6
Howard George/science Photo Library
Young Woman Crying
Ian Hooton/science Photo Library
Tired Baby #1
Ian Hooton/science Photo Library
Elderly Man Dozing #1
Lea Paterson/science Photo Library
Woman Touching Bridge Of Nose #6
Science Photo Library
Pregnant Woman With A Headache
Aj Photo/science Photo Library
Man Sleeping On A Sofa
Lea Paterson/science Photo Library
Woman Yawning #3
Ian Hooton
Tired Boy Asleep On His Homework
Mauro Fermariello/science Photo Library
Pregnant Woman Sleeping
Ian Hooton/science Photo Library
Tired Elderly Woman
Mauro Fermariello/science Photo Library
Doctor Relaxing
Aj Photo/science Photo Library
Woman Yawning
Kate Jacobs/science Photo Library
Pregnant Woman Sleeping #3
Ian Hooton/science Photo Library
Tired Elderly Woman #6
Cristina Pedrazzini/science Photo Library
Office Stress #7
Howard George/science Photo Library
Tired Elderly Man #1
Mauro Fermariello/science Photo Library
Workload
Howard George/science Photo Library
Stressed Doctor #4
Mark Thomas/science Photo Library
Insomnia
Tim Vernon / Science Photo Library
Man Touching His Forehead
Science Photo Library
Man Pinching The Bridge Of His Nose #1
Science Photo Library
Man Pinching The Bridge Of His Nose #4
Science Photo Library
Elderly Man Dozing
Lea Paterson/science Photo Library
Upset Woman #3
Aj Photo/science Photo Library
Woman Rubbing Her Temples
Science Photo Library
Upset Woman #3
Bettina Salomon/science Photo Library
Headache #7
Lea Paterson/science Photo Library
Father And Son
Ian Hooton/science Photo Library
Stressed Doctor
Cc Studio/science Photo Library
Tired Elderly Woman #2
Cristina Pedrazzini/science Photo Library
Over-worked
Mauro Fermariello/science Photo Library
Woman Yawning
Science Photo Library
Over-worked Doctor
Mauro Fermariello/science Photo Library
Roseroot Seed Heads
Duncan Shaw/science Photo Library
Newborn Baby Boy Sleeping
Cecilia Magill/science Photo Library
Overworked Doctor #1
Aj Photo/science Photo Library
Tired Senior Woman
Lea Paterson/science Photo Library
Elderly Man Holding His Head
Lea Paterson/science Photo Library
Headache Pill
Aj Photo/science Photo Library
Sad Young Man
Mauro Fermariello/science Photo Library
Sleeping Woman #4
Ian Hooton/science Photo Library
Tired Baby #1
Ruth Jenkinson/science Photo Library
Headache
Bettina Salomon/science Photo Library
Headache #1
Bettina Salomon/science Photo Library
Father And Son #13
Ian Hooton/science Photo Library
Tired Girl Working At A Home Computer
Cc Studio/science Photo Library
Cans Containing Energy Drinks #1
Science Photo Library
Headache #3
Lea Paterson/science Photo Library
Tired Office Worker
Aj Photo/science Photo Library
Tired Woman #5
Ian Hooton/science Photo Library
Bored Boy Not Doing His Homework #2
Mauro Fermariello/science Photo Library
Upset Woman #2
Bettina Salomon/science Photo Library