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As someone who lives in gym leggings (thanks to my love-hate relationship with spin class), I’ve learned the hard way that washing activewear wrong can ruin expensive workout gear faster than a dropped dumbbell. Synthetic fabrics like polyester, spandex, and nylon need special care to prevent odors, stretching, and pilling.
After years of trial and error (and a few shrunken sports bras), here’s my ultimate guide to keeping your gym clothes fresh, functional, and long-lasting.
1. The Essential Do’s of Washing Activewear
DO Turn Clothes Inside Out
This protects printed designs and reduces friction that causes pilling. I always flip my leggings and sports bras inside out before tossing them in the wash.
DO Use Cold Water & Gentle Cycle
Hot water breaks down elastic fibers and sets sweat odors. Stick to cold water (30°C max) and a delicate cycle to preserve stretch.
DO Use a Sports Detergent
Regular detergents don’t fully remove sweat bacteria. I swear by Hex Performance Detergent or Tide Sport—they’re formulated to tackle odor-causing microbes.
DO Air Dry Whenever Possible
High heat destroys elasticity. Hang dry your activewear or use a low-heat tumble dry for just 10-15 minutes to speed up the process.
2. The Critical Don’ts (That Ruin Gym Clothes)
DON’T Use Fabric Softener or Dryer Sheets
They coat technical fabrics, reducing moisture-wicking abilities and trapping odors. My leggings started smelling musty until I ditched softener!
DON’T Wash With Cotton Towels or Jeans
Abrasive fabrics cause pilling. Wash activewear separately or with similar lightweight items.
DON’T Let Sweaty Clothes Sit in the Hamper
Bacteria multiply fast, causing permanent odors. If you can’t wash immediately, hang gear to air out first. I keep a mesh bag in my gym locker for post-workout clothes.
DON’T Iron or Use Bleach
High heat melts synthetic fibers, and bleach weakens fabric. For stains, spot-treat with baking soda paste instead.
3. Pro Tips for Stubborn Odors & Stains
The Vinegar Soak (For Stinky Clothes)
Every few weeks, I soak my workout clothes in:
- 1 cup white vinegar + cold water for 30 minutes
- Then wash as usual. This kills odor-causing bacteria without harsh chemicals.
Baking Paste for Armpit Stains
Mix:
- 2 tbsp baking soda + 1 tbsp water
- Rub into stained areas before washing. Works better than stain sticks!
Freeze Synthetic Clothes (Yes, Really!)
For items that still smell after washing, seal them in a bag and freeze overnight. Cold temperatures kill some odor bacteria.
4. When to Call the Professionals
Despite your best efforts, some stains (like grease from gym equipment) or odors just won’t budge. That’s when it’s time to call Swabi Laundry, Dubai’s #1 online laundry service for activewear.
Their deep-cleaning process uses:
- Eco-friendly detergents safe for technical fabrics
- Cold-water wash cycles to preserve elasticity
- Professional odor removal for stubborn smells
Plus, their free pickup/delivery service is a game-changer for busy fitness lovers.
Final Thoughts
Activewear is an investment—proper care keeps it performing (and looking) like new. Follow these do’s and don’ts, and your gym clothes will last way longer than your New Year’s resolutions.
And when in doubt? Let Swabi Laundry handle the dirty work!

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