I should exercise more.

我应该多锻炼。

《柯林斯英汉双解大词典》

We should exercise every day.

我们每天都要锻炼身体。

youdao

You should exercise more so as to keep energetic and you can work efficiently.

你应该多运动以保持精力充沛，才可以有效地工作。

youdao

In addition, the newer suggestions say any exercise plan should include at least two days of muscle training.

VOA: special.2010.06.08

this should be a very interesting exercise and fun to think about a dietary analysis like this.

这次作业会很有意思,研究这种食谱分析真的很有趣

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Oh really? You should, exercise is fun.

哦，是吗？你应该多锻炼，因为运动是很有趣的。

Do you ever实战 - SpeakingMax英语口语达人

But it does mean that lawmakers should exercise some prudence and judgment when deciding tax policy.

FORBES: A Laffer Curve Warning about the Economy and Tax Revenue for President Obama and other Class Warriors

"The government should exercise its power in safeguarding its citizens, not use it against them, " he said.

WSJ: Second Arrest Made in Delhi Rape Case

Travelers should exercise caution visiting parts of Baja California, Guerrero, Nayarit and Nuevo Leon, the advisory says.

CNN: U.S. broadens Mexico travel warning