There is usually a real physical effect you can see.

You can take action to fight the physical effects of bed rest.

Except for children, the physical effects are not easy to measure.

What physical effect would it have on human and bird life?

Those who take drugs, for instance, do so because of the physical effects they hope to experience.

Perhaps it was not so much a physical effect as a psychic one.

Certainly, it can have a physical and physiological effect on the woman.

But this purely physical effect would not take place for several days.

There are many physical effects neglect can have on a person.

I'm not concerned about physical effects of the brain damage.