This week, Mary decodes: Workout fabric.
Are you extra smelly after a workout? It might not actually be you. Your GYM CLOTHES could be the culprit.
Over the past year, I’ve been trying to maintain a weekly intense workout session and hot yoga class and that’s when I started to notice that my clothes would reek ALL THE TIME! I’m not sure how many times I’ve had to rewash my leggings and t-shirts. They seem to smell like ammonia no matter how many times they go through the wash. After some research and investigation, I know why;
BACTERIA GROWS ON DIFFERENT FABRICS
In a research study conducted at Ghent University,the overall odor of different clothing from a focus group was comparedafter an intense one-hour spinning class. They wore t-shirts made of eithercotton, polyester, or a cotton-synthetic blend. The T-shirts were collected, sealed in plastic bags, and stored at room temperature in the dark, so bacterial growth occurred.
Results from an odor panel determined thatthe polyester clothing smelled SIGNIFICANTLY LESS PLEASANT. Itwas described as more intense, musty, strong and sour. I can’t even imagine having to be on that odor panel smelling these sweaty, musty clothes!
So the study then analysed the bacterial composition of each fabric and what they discovered was the following.
All of the shirts grew several types of bacteria, but it was found thatMicrococcus(a type of odor-causing bacteria) grew on:
- 100% of the synthetic t-shirts worn in the study
- 82% of the cotton-synthetic blend t-shirts worn in the study
- 0% on the cotton t-shirts worn in the study.
It was even found that thatstinkyMicrococcibacteria grows better on synthetic fabricsthan on your underarms! This explains why gym clothes seem to smell even worse than when our bodies sweat.
WHAT WORKOUT CLOTHES ACTUALLY DO:
“Moisture-wicking” or “Sweat Technology” often comes to mind when we think of workout clothes. I know I definitely look for that, because who wants to feel like a sweaty mess when working out. It’s hard enough to get yourself to the gym!
However, what you may not know is “moisture-wicking” basically means the clothing is made out ofsynthetic fabric like polyester, designed to keep you dry while you workout.
Polyester is a petroleum-based synthetic fiber and doesn’t have any natural properties which means it hasvery poor ADSORBING capacity. While your sweating, the moisture would evaporateTHROUGHthe fibres of your clothing instead of adsorbingINTOthe fibres.
Adsorbing vs Absorbing
Adsorption=the process in which liquids from a substanceadhere to a surfaceof the adsorbent.
Absorption=the process in whicha fluid is dissolvedby a liquid or a solid.
WHY DOES IT SMELL SO BAD?
Even though “moisture-wicking” means that fitness clothes will dry faster, the problem is bacteria from your sweatgets trapped IN BETWEEN the fibresas it passes through the garment.
The bacteria that becomes trapped in between the fibres will create a pungent odor, we often smell in our gym bags and clothes. I think I just lost my appetite thinking about it!
Bacteria + Sweat = Odor
The more you wear the garment and sweat in it,the more bacteria and odor that will become trapped, making it even more difficult to wash out.
WHAT YOU SHOULD WEAR INSTEAD
Cotton is a natural fiber (originating from theGossypiumcotton plant) almost entirely made up of cellulose,which gives it the ability to adsorb sweat and odor RIGHT INTO the fibres. This avoids bacteria becoming trapped in between the fibres and allows for better removal from the fibres when washed.
The weird part is, depending on whether you wear synthetic fabric or cotton, your workout clothes will end up smelling differently by the time they make it to the laundry hamper.
HERE’S WHAT YOU CAN DO
If stinky gym clothes are making your whole closet smell, don’t leave them sitting for a week before they make it into the wash. Bacteria LOVES a dark, cozy place like a gym bag or laundry hamper to grow even more bacteria.
- Try hanging your clothes up to dryinstead of throwing them damp directly in the hamper.
- Wash your clothes immediately after you workoutif you can.
- Swap out your synthetic garments for cotton alternatives.
- Use a sportlaundry detergent designedfor this type of bacteria.
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