Correct sentence.

[Julierose]

Why should we do exercise?
OR
Why should we exercise?

-Are both these sentences correct?

Thanks,
Julie.

[English Freak]

Yes, both are right.

[Julierose]

Thankyou for the reply. However,there is still a lingering doubt In the case of " Let's do some more exercises"- do exercise is correct.

But how about this-" We need to do exercise to keep us healthy." Isn't "we need to exercise to keep us healthy", more appropriate?

[Raymott]

Thankyou for the reply. However,there is still a lingering doubt In the case of " Let's do some more exercises"- do exercise is correct.

But how about this-" We need to do exercise to keep us healthy." Isn't "we need to exercise to keep us healthy", more appropriate?

They're both right. Exercising = Doing exercise. But I agree that your last example sounds better.