From Freshly Showered to What the F$ck Is That Smell?

You arrive at the gym freshly showered.

Deodorant on. Clean clothes. Hair smells good. Maybe you even put on a little perfume or body spray because apparently you are feelin’ extra fresh today. You smell fantastic.

Forty-five minutes from now, you're going to catch a whiff of something during a set of squats and start looking around the room for the person responsible.

Bro, it's you.

This feels a little personal, but there's actually a lot going on between freshly showered and Jesus Christ, what happened? And no, it isn't just because you sweat.

Minute 0: We Are Clean and Optimistic

At this point, everything is going beautifully.

Your shirt came straight out of the laundry. Your deodorant is doing exactly what the commercials promised. There is absolutely no reason to believe that any part of this situation is going to deteriorate.

Then you start exercising.

Your body temperature rises, and your eccrine sweat glands start releasing sweat to help cool you down. You have millions of these glands spread across your body, and the sweat they produce is mostly water and salt.

Here's the important part: fresh sweat really doesn't smell that bad.

Which means sweat has been taking the blame for something it did not technically do.

Give it time.

Minute 10: Still Acceptable

You're sweating now, but everything seems normal. Forehead. Back. Chest. Maybe the first hint of swamp developing underneath the sports bra.

Nothing concerning.

But your body has another type of sweat gland called an apocrine gland, found primarily around places like your armpits and groin. The sweat from these glands contains more proteins and fats. Still not necessarily stanky.

But then…… the bacteria living on your skin get involved. They break down compounds in your sweat and produce the substances responsible for body odor. So technically, when you smell bad during a workout, you're smelling the result of bacteria eating your sweat.

Bacteria. Just having a full meal on your body while you deadlift. No permission asked.

I apologize for making this worse.

Minute 20: Is That Me?

This is usually when the investigation begins.

You catch a whiff of something. Very subtle. But you keep moving.

Then it happens again.

You casually turn your head toward one armpit, pretending you're stretching your neck.

Nothing...Other side...

Geeeezuuuz.

There it is. Yep. It's you, girl. It's been you the whole time and everyone around you probably already knew.

This can also explain why your sweat doesn't always smell exactly the same. Body odor can be affected by your skin bacteria, hormones, stress, certain foods and medications, among other things.

Stress sweat can be particularly noticeable because emotional sweating involves those apocrine glands more heavily.

So if you're nervous AND exercising…cool. Your armpits have decided this warrants a full-blown response, like they've got something to prove.

Minute 30: The Shirt Betrays You

Now we need to discuss gym clothes. Because sometimes you KNOW the shirt was clean. You washed it. You dried it. You smelled it before putting it on because apparently we all do this now.

It was 100% fine.

Then you started sweating and suddenly it smells like you dipped it in whatever leaks out of the back of a garbage truck. Synthetic fabrics such as polyester are fantastic for workout clothes because they're lightweight and wick moisture. Unfortunately, they can also be particularly good at hanging onto odor-causing compounds. They just hold onto it. Forever.

Research has found that odor-producing bacteria and smelly compounds can behave differently on synthetic fabrics compared with natural fibers. Translation: your shirt can come out of the laundry smelling perfectly respectable and start producing a gag-worthy stank again once it gets warm and damp.

This is why you occasionally smell yourself five minutes into a workout and think:

There is no f$cking way. I JUST put this on.

Oh but there is a way.

You only washed it….you didn't erase its memory of past stanky experiences. That shirt has been through some shit and doesn't want you to forget either.

Minute 40: Why Does It Smell…Different?

Most workout stink falls somewhere in the familiar armpit category. But every once in a while, you get something…mmm...different.

Maybe your sweat smells more like sharp cheddar than Swiss. Some people describe an ammonia-like smell after particularly hard exercise. Naturally, the internet decided this means you're immediately burning all your muscle for fuel and should panic.

Not quite.

Ammonia is a normal byproduct related to protein and amino-acid metabolism. During hard exercise, particularly when carbohydrate availability is lower, nitrogen metabolism can increase. Ammonia can eventually make its way into sweat.

Hydration can also affect how concentrated smells seem. So no, smelling a little like ammonia after a hard workout does not automatically mean your body just ate your biceps for lunch while you weren't looking.

If a new or unusual body odor is persistent or comes with other symptoms, though, that's worth discussing with a healthcare professional rather than asking the lady next to you at the squat rack her opinion on the funk under your arm.

Workout Over: We Have Given Up

You're done. Your face is red. Your hair is wet in places you didn't realize had sweat glands. The sports bra needs to be handled with caution and possibly gloves.

This is where you have an important decision to make.

Go home and shower?

Or stay in your damp workout clothes for another four hours while you go to Target, pick up a kid, answer emails and somehow end up at the grocery store?

We both know which one happens.

And the longer sweat, bacteria and damp fabric hang out together, the less likely you are to smell like the person who confidently walked into the gym an hour ago. You now smell like a locker room and a compost bin had a baby.

The Next Day: Round Two

The real betrayal happens when you put on supposedly clean workout clothes and recognize yesterday's workout ten minutes into today's. Same smell. Different day. You didn't even do anything yet.

If this keeps happening, regular detergent may not be fully removing the oils and odor compounds trapped in the fabric. Washing workout clothes relatively soon after wearing them, not leaving them balled up wet in a gym bag, and making sure they dry completely can help.

And if one particular shirt has reached the point where it smells bad before the warm-up is over despite being washed properly?

We need to stop fighting for this relationship.

It had a good run.

Let it go.

Because the journey from freshly showered to what the f$ck is that smell? is completely normal.

Your body is regulating temperature. Your sweat glands are doing their jobs. Your skin bacteria are doing theirs, apparently just loving their lives.

Your polyester shirt, however, can go hop in that garbage truck.