Feeling a little sleepy while at work? It might be due to your work schedule.
A sleep expert says starting work before 9 a.m. is torture and may cause people to feel exhausted and stressed.
Starting at an earlier time can also affects attention and memory and can lead to alcohol and drug abuse.
Experts say starting work before 9 a.m. only poses a threat to your health until age 55 when people start needing less sleep.