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Running shorts are an essential piece of gear for every runner, whether you’re a beginner hitting the pavement for the first time or an experienced marathoner pushing for a new personal best.
The right pair of running shorts can make a significant difference in your comfort, performance, and overall running experience.
However, with so many styles, materials, and features to choose from, finding the perfect pair can be overwhelming. Should you go for compression shorts or loose-fitting ones? Are liners necessary?
What’s the best fabric for preventing chafing? If you’ve ever wondered about these things, you’re not alone!
On this page, we answer the 30 most frequently asked questions about running shorts to help you make an informed decision.
Whether you’re looking for recommendations, fit advice, or maintenance tips, this blog post will provide clear, detailed, and practical answers to all your running shorts questions.
Let’s dive in!
Questions List
1. What are running shorts, and how are they different from regular shorts?
Running shorts are specially designed shorts made for running and other physical activities. They are different from regular shorts because they are lightweight, breathable, and often made from moisture-wicking materials that help keep you dry by pulling sweat away from your body.
Running shorts typically have a loose or athletic fit to allow freedom of movement and prevent chafing. Many running shorts also include built-in liners or compression shorts for extra support and comfort. Unlike casual shorts, which may be made from cotton or denim, running shorts are made from synthetic fabrics like polyester or nylon to enhance durability, stretch, and performance.
2. Why do running shorts have built-in liners?
Many running shorts come with built-in liners, which act as a replacement for underwear. These liners provide support, reduce chafing, and help wick away moisture, keeping you dry and comfortable during your run.
The liner is typically made from soft, breathable fabric, such as mesh or lightweight polyester, to ensure ventilation and prevent overheating. Additionally, the built-in liner helps prevent the shorts from riding up, reducing the chances of discomfort and irritation. While some runners prefer lined shorts for the extra convenience and support, others may opt for unlined shorts so they can wear their preferred type of compression shorts or underwear underneath.
3. What materials are best for running shorts?
The best materials for running shorts are synthetic fabrics that are lightweight, moisture-wicking, and breathable. The most common materials include:
- Polyester: A durable and moisture-wicking fabric that dries quickly and resists wrinkles.
- Nylon: Offers a soft feel, excellent durability, and good stretch.
- Spandex (Elastane/Lycra): Provides stretch and flexibility, often used in compression shorts or blended with polyester or nylon.
- Mesh panels: Sometimes included to improve ventilation and airflow.
Avoid cotton for running shorts, as it absorbs moisture and takes longer to dry, leading to discomfort and chafing. Choosing a fabric with moisture-wicking properties will help keep sweat off your skin and prevent irritation.
4. How should running shorts fit?
Running shorts should fit comfortably, allowing you to move freely without restriction. They should not be too tight or too loose. The waistband should sit securely on your waist without digging in or sliding down as you run. If the shorts have a built-in liner, it should feel snug but not restrictive.
- For loose-fit running shorts: The leg openings should provide enough room for movement, but not be so loose that they flap excessively in the wind.
- For compression running shorts: They should feel snug but not overly tight, providing support to your muscles without cutting off circulation.
The best way to find the right fit is to try different styles and see which one feels most comfortable for your running style and body shape.
5. What is the ideal length for running shorts?
The ideal length for running shorts depends on your personal preference and running style. Running shorts come in different lengths, typically measured by the **inseam** (the length from the crotch to the hem of the shorts). Here are the most common lengths:
- 2-inch to 3-inch inseam: These are short, lightweight running shorts often preferred by competitive runners. They offer maximum freedom of movement but may feel too revealing for some.
- 5-inch inseam: A popular length for both casual and serious runners, balancing mobility and coverage.
- 7-inch inseam: Offers more coverage and is preferred by those who want extra protection against chafing.
- 9-inch inseam or longer: Typically found in compression or trail running shorts, these provide extra muscle support and coverage.
Choosing the right length depends on your comfort level, running environment, and personal preference. Shorter shorts allow for better ventilation, while longer shorts provide more coverage and protection.
6. Should I wear underwear with running shorts?
If your running shorts have a built-in liner, you generally do not need to wear underwear. The liner is designed to provide support, reduce chafing, and wick away moisture, offering the same function as underwear. Adding extra underwear could lead to excess sweat retention and discomfort.
However, if you prefer running shorts without a liner, you can wear moisture-wicking underwear or compression shorts underneath for added comfort and support. Avoid wearing cotton underwear, as it absorbs sweat and increases the risk of chafing.
7. Are compression shorts better than regular running shorts?
Compression shorts and regular running shorts serve different purposes.
- Compression shorts: Provide muscle support, reduce fatigue, and improve blood circulation. They also help minimize chafing and keep everything in place, making them a great choice for long-distance running or intense workouts.
- Regular running shorts: Offer more breathability and freedom of movement, making them more comfortable for casual running or warm-weather conditions.
Some runners prefer to wear compression shorts under regular running shorts for a combination of support and comfort. Ultimately, the choice depends on your running style and personal preference.
8. How do I prevent chafing when wearing running shorts?
To prevent chafing while wearing running shorts:
- Choose moisture-wicking materials: Synthetic fabrics like polyester and nylon help keep sweat away from your skin.
- Wear compression shorts or liners: These reduce friction and provide additional protection.
- Apply anti-chafing products: Use petroleum jelly, anti-chafing balms, or powders on areas prone to irritation.
- Ensure a proper fit: Shorts that are too loose or too tight can increase friction and cause chafing.
- Stay dry: Change out of sweaty clothes quickly after running to avoid irritation.
9. How do I wash and care for my running shorts?
To keep your running shorts in good condition:
- Read the care label: Follow the manufacturer’s instructions for washing and drying.
- Wash in cold water: This helps preserve the fabric and prevent shrinking.
- Use mild detergent: Avoid fabric softeners, as they can reduce moisture-wicking properties.
- Air dry: If possible, hang your shorts to dry instead of using a dryer to prolong their lifespan.
- Avoid excessive heat: High temperatures can weaken elastic fibers and cause shrinkage.
Proper care ensures that your running shorts last longer and maintain their performance benefits.
10. Are running shorts good for other workouts?
Yes, running shorts can be worn for other types of workouts such as gym training, yoga, hiking, or general sports activities.
Their lightweight, breathable, and moisture-wicking properties make them suitable for various forms of exercise. However, for activities like weightlifting or cycling, you might prefer compression shorts or longer athletic shorts for better coverage and muscle support.
11. Can I wear running shorts casually?
Yes, many people wear running shorts casually, especially in warm weather. They are comfortable, lightweight, and easy to move in. Pairing them with a casual T-shirt or hoodie can create a relaxed, sporty look.
However, since running shorts are designed for physical activity, they may not always have the structured look of casual shorts. If you prefer a more stylish option, look for running shorts with a neutral design and subtle branding.
12. Do running shorts come in different lengths?
Yes! Running shorts come in a variety of lengths to suit different preferences and activities. The length is typically measured by the inseam (the distance from the crotch to the hem of the shorts). Here are the most common options:
- 3-inch inseam: Best for competitive runners who want minimal coverage and maximum freedom of movement.
- 5-inch inseam: A balanced option for both casual and serious runners, offering some coverage while maintaining mobility.
- 7-inch inseam: Provides more coverage and is great for those who prefer a longer fit or extra protection from the elements.
- 9-inch inseam: Less common for running but preferred by those who want maximum coverage and comfort.
Choosing the right length depends on your personal preference, running style, and comfort level.
13. Do running shorts have padding?
Most running shorts do not have padding because they are designed for lightweight movement and flexibility. However, some running shorts—especially those used for trail running or long-distance training—may include a slight cushioned liner for extra comfort. If you need padding for additional support, you might consider wearing compression shorts underneath or opting for shorts with built-in briefs to reduce friction and chafing.
14. Are compression running shorts better than loose-fitting ones?
Compression running shorts and loose-fitting running shorts both have their benefits, and the best choice depends on your personal needs.
- Compression running shorts provide muscle support, reduce fatigue, and improve blood circulation. They are great for long-distance runners, recovery runs, and cold-weather training.
- Loose-fitting running shorts offer breathability, airflow, and a relaxed feel. They are ideal for casual runs and runners who prefer a less restrictive fit.
Some runners wear compression shorts underneath loose-fitting shorts to get the best of both worlds—support and breathability.
15. Are running shorts supposed to be tight?
Not necessarily. Running shorts should be comfortable and allow free movement. Some shorts, like compression shorts, are designed to be tight-fitting to provide muscle support.
However, traditional running shorts should have a relaxed fit, allowing you to move without restriction. If your shorts feel too tight around the waist, thighs, or hips, you may need to size up. The key is to choose a fit that feels good during your run and doesn’t cause irritation or discomfort.
16. Are running shorts waterproof?
Most running shorts are not fully waterproof, but many are water-resistant. Water-resistant shorts can repel light rain or sweat, keeping you dry for a short period. However, they won’t keep you completely dry in heavy rain. If you frequently run in wet conditions, look for running shorts made with DWR (Durable Water Repellent) coating or lightweight materials that dry quickly. You can also layer waterproof running pants over your shorts in extreme conditions.
17. Are running shorts good for cold weather?
Running shorts alone may not be warm enough for cold weather. If you run in low temperatures, you can layer by wearing thermal or compression leggings underneath your shorts to keep your muscles warm. Some running shorts are made with thermal fabrics or have extra insulation for chilly conditions, but for extremely cold weather, wearing full-length running tights or thermal pants is a better option.
18. What’s the difference between split shorts and regular running shorts?
Split shorts have slits on the sides, allowing for greater mobility and a full range of motion. These are commonly worn by professional and competitive runners because they reduce fabric resistance. Regular running shorts do not have these slits and provide more coverage, making them a better option for general running or casual wear. The choice between split shorts and regular running shorts depends on whether you prioritize speed and mobility or coverage and comfort.
19. Can women wear men’s running shorts?
Yes, women can wear men’s running shorts, but they may not fit as comfortably as women’s-specific designs. Men's running shorts typically have a straighter cut and wider leg openings, while women’s shorts are designed with a more contoured fit for better comfort. However, if you prefer a looser fit or longer length, men’s running shorts may work for you. The most important thing is to find a pair that feels comfortable and allows for free movement.
20. Why do some running shorts have pockets?
Many running shorts come with pockets to store small essentials like keys, energy gels, or a phone. Some shorts have zippered pockets for security, while others feature small internal pouches for lightweight storage. However, pockets can add bulk and movement to the shorts, which is why some runners prefer pocketless designs for a more streamlined feel. If you like carrying items while running, look for shorts with well-placed, bounce-free pockets.
21. What’s the best waistband for running shorts?
The best waistband for running shorts depends on comfort and fit. There are three common types:
- Elastic waistband: Stretchy and adjustable, but can sometimes feel too tight.
- Drawstring waistband: Provides a custom fit and prevents slipping.
- Wide waistband: Found in many compression shorts for extra comfort and support.
A good waistband should stay in place while running without digging into your skin or feeling too loose.
22. Do running shorts shrink after washing?
Most running shorts made from synthetic materials (polyester, nylon, spandex) do not shrink much after washing. However, if exposed to high heat in the dryer, they might shrink slightly. To prevent shrinking, always follow care instructions: wash in cold water and air dry or tumble dry on low heat.
23. Can I wear running shorts for marathon races?
Yes! Running shorts are a great choice for marathons because they are lightweight, breathable, and flexible. Most marathon runners prefer shorts with moisture-wicking fabric and built-in liners to reduce chafing. If you’re running a long-distance race, you might want shorts with pockets for carrying energy gels or essentials. The key is to choose a pair that feels comfortable and supportive for extended wear.
24. Are there running shorts for plus-size runners?
Yes! Many brands offer plus-size running shorts with wider waistbands, adjustable drawstrings, and stretchy materials for comfort and support. Some brands also include longer inseams to reduce chafing. When shopping for plus-size running shorts, look for moisture-wicking fabrics and a secure waistband that stays in place during movement.
25. What are trail running shorts, and how are they different?
Trail running shorts are designed for off-road running and have extra durability compared to regular running shorts. They often include:
- More pockets for carrying small gear or snacks.
- Longer inseams for extra protection against branches and debris.
- Stronger fabrics to handle rough terrain.
- Moisture-wicking properties to keep sweat and dirt away.
If you do a lot of trail running, choosing shorts made for rugged conditions will enhance comfort and performance.
26. How do I know if my running shorts are too small?
Your running shorts might be too small if:
- They restrict movement or feel too tight around your thighs.
- The waistband digs into your skin or causes discomfort.
- The built-in liner feels too tight or rides up.
- They cause chafing or irritation in areas where fabric should fit loosely.
Proper-fitting shorts should allow free movement and not cause discomfort during a run.
27. Why do professional runners wear very short shorts?
Professional runners wear very short shorts (split shorts or racing shorts) because they minimize resistance and allow maximum freedom of movement. Shorter shorts help keep cool during long races and reduce the amount of fabric friction against the skin. While they may not be for everyone, they are preferred by elite runners who prioritize performance over coverage.
28. Are there eco-friendly running shorts?
Yes! Many brands now offer eco-friendly running shorts made from recycled polyester, organic cotton, or plant-based fabrics. These shorts help reduce environmental impact while still providing moisture-wicking and breathable properties. If sustainability is important to you, look for brands that use recycled materials and ethical manufacturing processes.
29. Do running shorts have UV protection?
Some running shorts come with UV protection to shield your skin from harmful sun rays. Look for shorts labeled UPF 30 or higher, which provide good sun protection. While most running shorts offer some natural UV resistance, wearing sunscreen and UV-protective clothing is always a good idea for long runs in the sun.
30. What are the best running shorts for beginners?
If you’re new to running, look for shorts that are:
- Lightweight and breathable to keep you cool.
- Moisture-wicking to prevent sweat buildup.
- Mid-length (5-7 inches inseam) for a balance of comfort and mobility.
- Have a drawstring waistband for an adjustable fit.
- Include built-in liners or pockets for convenience.
Starting with a comfortable, versatile pair of running shorts will help you stay motivated and enjoy your runs.
Final Thoughts
Running shorts are a key piece of gear for any runner, offering comfort, breathability, and flexibility. Whether you prefer split shorts for speed, compression shorts for support, or longer shorts for coverage, choosing the right pair depends on your running style, climate, and personal preference.
When selecting running shorts, consider materials, fit, length, and extra features like pockets or built-in liners. With the right shorts, you can prevent chafing, stay cool, and maximize your running performance.
Hopefully, these 30 FAQs have answered all your questions about running shorts. Now, you can make an informed choice and enjoy your runs in total comfort! Happy running! 🏃♂️🏃♀️