Working out is great for your body and your mind. Your gym clothes, on the other hand, take a beating. Between sweat, body oils, and the synthetic fabrics most activewear is made from, gym clothes can hold onto odors and bacteria in ways that regular laundry simply doesn't. Washing them the wrong way can make the smell worse, damage the fabric, and shorten the life of your gear.
Here's everything you need to know to keep your workout clothes fresh, clean, and lasting as long as possible.
Why Gym Clothes Are Harder to Wash Than Regular Laundry
Most activewear is made from synthetic fabrics like polyester, nylon, and spandex. These materials are great for working out because they're lightweight, stretchy, and moisture-wicking. But those same properties make them a magnet for body oils and sweat, which get trapped deep in the fibers.
When sweat sits in synthetic fabric, it breaks down into compounds that produce that familiar, stubborn gym bag smell. The longer it sits, the harder it is to get out. Even after washing, you might notice the smell returns the moment you start sweating again. That's a sign the odor hasn't been fully removed from the fabric.
Cotton gym clothes have a different problem. Rather than trapping oils, cotton absorbs sweat like a sponge and holds onto it as it dries, releasing the odor when the fabric gets wet again.
Understanding this is the first step to actually solving the problem.
What You'll Need
Liquid laundry detergent
White vinegar or baking soda (optional, for stubborn odors)
A washing machine
A drying rack or clothesline
Step-by-Step: How to Wash Gym Clothes
Step 1: Don't Let Them Sit
The single biggest mistake people make with gym clothes is leaving them in a pile or a gym bag after a workout. Damp, warm fabric is the perfect environment for bacteria to multiply, which is exactly what causes that deep-set odor. If you can't wash them right away, take them out of your bag and let them air dry completely before putting them in the laundry hamper. Even spreading them out on a hook or a chair makes a significant difference.
Step 2: Turn Them Inside Out
Before putting anything in the washing machine, turn your gym clothes inside out. The inside of the fabric is where sweat, skin cells, and body oils accumulate most heavily. Turning garments inside out puts that surface in direct contact with the water and detergent, giving you a much more thorough clean.
Step 3: Wash in Cold or Warm Water
Check the care label first, but most activewear should be washed in cold or warm water rather than hot. High heat can break down the elastic fibers in synthetic fabrics over time, causing them to lose their shape and stretch. It can also damage moisture-wicking technology built into performance fabrics. Cold water is gentler on the fabric and still effective at removing odors when combined with the right detergent.
Step 4: Use the Right Amount of Detergent
With gym clothes, more detergent is not better. Excess detergent can leave a residue in synthetic fibers that actually traps more odor over time, creating a buildup that gets worse with every wash. Use a standard amount of liquid detergent, and make sure it dissolves fully in the wash.
For particularly stubborn smells, add half a cup of white vinegar to the wash cycle. Vinegar is a natural odor neutralizer and won't damage your fabrics. Alternatively, a baking soda presoak works well: dissolve a few tablespoons in a basin of cold water, submerge your gym clothes, and let them soak for 15 to 30 minutes before washing as normal.
Step 5: Skip the Fabric Softener
This is important. Fabric softener coats the fibers of synthetic fabrics, which clogs the moisture-wicking channels built into performance wear and reduces the fabric's ability to breathe. Over time it also traps odor. Leave fabric softener out entirely when washing gym clothes.
Step 6: Don't Overload the Machine
Gym clothes need room to move freely in the drum to get properly clean. Overloading the machine means water and detergent can't circulate effectively, leaving some areas of the fabric undertreated. Wash your activewear in a reasonably sized load and give it space.
Step 7: Air Dry When Possible
Wherever possible, skip the dryer for gym clothes and let them air dry on a rack or clothesline instead. The heat from a dryer can break down elastic fibers and degrade the technical properties of performance fabrics over time. Air drying is gentler, extends the life of your gear significantly, and is better for the environment. If you do use a dryer, use the lowest heat setting available and remove the clothes promptly.
Tips for Keeping Gym Clothes Smelling Fresh
Wash them after every workout. Unlike jeans or a sweater, gym clothes shouldn't be worn multiple times between washes. Each workout adds another layer of sweat and bacteria.
Air out your gym bag too. The inside of your bag absorbs odors from your gear over time. Leave it open to air out between uses and wash it regularly.
Don't leave wet clothes in a sealed bag. If you're heading straight from the gym to work or an errand, try to keep wet clothes in a mesh or breathable bag rather than a sealed one.
Wash gym clothes separately. Keeping activewear in its own load means you can tailor the wash settings to what the fabric needs, without worrying about other garments.
If the smell persists after washing, try the vinegar or baking soda soak before running another wash cycle. Repeated treatment is usually more effective than a single stronger wash.
A Note on Delicate Activewear
Sports bras, compression gear, and anything with a lot of stretch deserve extra care. These items are best washed on a gentle cycle in cold water and always air dried. The combination of high heat and agitation is what breaks down elastic fastest, so the gentler you can be with these pieces, the longer they'll last.
Let Get Fresh Start Laundry Handle It
Keeping up with gym laundry on top of everything else in your week adds up fast. If your activewear is piling up or you just want the peace of mind that it's being washed properly, Get Fresh Start Laundry is here to help.
Our pickup and delivery laundry service takes care of everything from workout clothes to everyday laundry. We use our state-of-the-art Ozone sanitizing system on every load, which kills 99.9% of bacteria, viruses, and mold, getting deep into fabric fibers where standard washing often falls short. Your clothes come back genuinely clean, fresh, and ready for your next workout.
We serve families throughout Westchester County, NY and Fairfield County, CT with flexible weekly, bi-weekly, or on-demand scheduling. No contracts, no hassle.
Join The Discussion!