Today’s entry is often more of a spelling issue than a grammar issue. But a mistake in this regard can be pretty amusing.

A regimen is a systematic plan or regular course of action to achieve a specific goal. Usually we’re talking about eating healthy food, exercising with a certain regularity, or following a plan for taking certain medicines when we use the word. For example,

I follow a daily regimen of exercise and physical therapy to maintain my strength as an athlete.

My condition means I have to follow a particular regimen of this over-priced drug.

A regiment, on the other hand, is a military unit usually made of several large groups of soldiers.

Example: Before the battle, the regiment staked out a strong position behind the hill.

So if you follow a daily regiment, you might get shot in the process.