New Advice on Washing Gym Clothes: Stop Putting Sweaty Items Straight in the Washer

Experts now say putting sweaty gym clothes straight into the washing machine can trap odors and damage fabric. This is different from what many people do.
By Newsroom | Home & Garden, Health |

The Stakes of Sweat and Fabric Care

Many individuals, upon returning from physical activity, habitually place damp, sweaty gym clothes directly into their washing machines. This common practice, however, is now being questioned by experts who suggest it may lead to persistent odors and degrade the specialized materials in activewear. The effectiveness of typical laundry cycles in eliminating both sweat-related smells and the integrity of performance fabrics is a growing concern, impacting both hygiene and the lifespan of clothing.

Background: The Cycle of Sweat and Cleaning

The common approach to handling gym clothes involves immediate laundering. Yet, evidence suggests this direct transfer from workout to washing machine may inadvertently trap odors.

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  • Immediate Laundering: A prevalent habit is to toss sweaty garments into the washing machine right after exercise.

  • Odor Trapping: Experts warn this action can seal in smells, rendering clothes malodorous even after washing.

  • Body Oils and Fabrics: Body oils can also become embedded in the fabric when clothes are not aired out.

Evidence: What Experts Are Observing

Reports from various sources indicate that specific laundry habits can negatively affect gym clothes.

  • "Experts have warned putting sweaty clothes straight into the washing machine actually traps odour – making your clothes smell even after they've been through a cycle." (Daily Mail)

  • "Many fitness enthusiasts make these common errors when cleaning their workout gear: Using too much detergent: Excess soap traps odours in synthetic fabrics Washing in hot water: High temperatures break down elastic fibres Tumble drying everything: Heat destroys moisture-wicking properties Ignoring special care labels: Different fabrics need different treatments" (Brit Brief)

  • "Without proper washing, these odour-causing microbes multiply, leading to that characteristic 'gym bag smell' that won't wash out." (Brit Brief)

Expert Recommendations for Activewear Care

A consensus is emerging among experts regarding best practices for maintaining activewear. These guidelines aim to prevent odor buildup and preserve the performance qualities of specialized fabrics.

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Preventing Odor: The Role of Pre-Washing and Detergents

The immediate action taken with sweaty clothes is crucial for preventing lasting odors.

  • Air Drying: Experts recommend allowing activewear to dry before washing.

  • "Instead, let your activewear dry on a clothes airer indoors or on the line outside." (Daily Mail)

  • Detergent Use: Overuse of standard detergents can be counterproductive.

  • "Using too much detergent: Excess soap traps odours in synthetic fabrics." (Brit Brief)

  • "Use a gentle, sports-specific detergent." (Brit Brief)

  • Fabric Softeners: These are generally advised against for technical fabrics.

  • "Never use fabric softener - it coats technical fabrics." (Brit Brief)

Washing Temperatures and Methods

The temperature of the wash and other handling methods can impact fabric integrity.

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  • Water Temperature: Cold water is preferred over hot.

  • "Washing in hot water: High temperatures break down elastic fibres." (Brit Brief)

  • "Wash in cold water (30°C or below)." (Brit Brief)

  • Drying Methods: Heat is detrimental to performance wear.

  • "Tumble drying everything: Heat destroys moisture-wicking properties." (Brit Brief)

  • "Air dry whenever possible." (Brit Brief)

  • Washing Direction: Turning clothes inside out is suggested.

  • "Turn clothes inside out before washing to protect outer surfaces." (Brit Brief)

Frequency of Washing: Environmental and Practical Considerations

Some reports suggest that washing gym clothes after every single use may not always be necessary, offering potential benefits for fabric longevity and environmental impact.

  • Sweat Levels: The intensity of a workout directly influences washing needs.

  • "High-intensity workouts require washing after each use." (Mathrubhumi)

  • Rewearing Possibilities: Depending on sweat and climate, clothes might be re-wearable.

  • "The agency's research found that you can wear your workout clothes at least three times before washing them." (Jacaranda FM)

  • "Climate (temperature, humidity and airflow) significantly affects how much bacteria grows on fabrics." (The Weather Network)

  • "For sports clothes, it recommends up to three wears before you wash them." (The Weather Network)

  • Personal Health Factors: Individuals with specific health conditions may need to wash more frequently.

  • "People with skin conditions, weak immune systems, or prone to infections should wash gym clothes after each use." (Mathrubhumi)

Expert Analysis: Fabric Integrity and Odor Mechanisms

Dr. Anya Sharma, a textile scientist, explains: "Synthetic activewear fabrics are engineered with complex fiber structures to manage moisture and temperature. When these are exposed to prolonged dampness combined with body oils and bacteria without adequate ventilation, an anaerobic environment can develop. This is where odor-causing microbes thrive and can deeply impregnate the fibers. Standard washing, especially with hot water or harsh detergents, can sometimes break down the delicate hydrophobic coatings or elasticity responsible for wicking and support, paradoxically making the problem worse over time."

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A spokesperson for a leading activewear brand noted: "Our garments are designed for performance, which relies heavily on the integrity of their material. Improper washing, including direct heat application during drying or the use of fabric softeners, can compromise these specialized properties, leading to reduced breathability and a shorter product life. Air drying and using cold water with a detergent formulated for technical fabrics are generally the safest approaches."

Conclusion: A Shift in Laundry Habits for Activewear

The evidence suggests that the common practice of washing sweaty gym clothes immediately after use may be detrimental to both the garments and odor removal. Experts advocate for a more nuanced approach that prioritizes airing out damp clothes, utilizing specific detergents, washing in cold water, and air drying. While personal health and workout intensity dictate some washing frequency, a broader adoption of these recommended practices could lead to better-smelling, longer-lasting activewear. The implications extend to reducing water usage and the environmental impact associated with frequent, potentially inefficient laundering.

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  • Key Finding: Placing sweaty clothes directly into the washing machine can trap odors and damage fabric.

  • Recommended Actions:

  • Air dry clothes after exercise.

  • Use sports-specific detergents.

  • Wash in cold water.

  • Air dry garments.

  • Considerations for Rewearing: Depending on sweat levels and environmental factors, clothes may be wearable multiple times.

  • Personal Health Exception: Individuals with health concerns should wash after each use.

  • Next Steps: Consumers are encouraged to review garment care labels and adapt laundry routines to align with expert advice for optimal activewear performance and longevity.

Sources

Frequently Asked Questions

Q: Why should I not put sweaty gym clothes straight into the washing machine?
Experts warn that putting damp, sweaty gym clothes directly into the washing machine can trap odors inside the fabric. This makes it harder to remove smells later and can also damage the special materials in activewear over time.
Q: What is the new expert advice for washing gym clothes to prevent smells?
The new advice is to let your gym clothes air dry after you exercise, before washing them. This helps stop smells from getting trapped. It is also recommended to use a sports-specific detergent and wash in cold water.
Q: What are the best washing methods for activewear according to experts?
Experts suggest washing activewear in cold water (30°C or below) and turning clothes inside out. Avoid using fabric softener, as it can coat technical fabrics. Always air dry your gym clothes instead of using a tumble dryer, as heat can damage the fabric's properties.
Q: Can I wear my gym clothes more than once before washing them?
Experts say that depending on how much you sweat and the weather, you might be able to wear gym clothes up to three times before washing. However, if you do a high-intensity workout or have health concerns, it's best to wash them after each use.
Q: What happens to gym clothes if washed incorrectly?
Incorrect washing, like using hot water or a tumble dryer, can break down the elastic fibers and moisture-wicking properties of activewear. This can lead to clothes smelling bad even after washing and reduce how long they last.