How to choose a athletic shorts
Updated June 2026Independently researchedNo paid placement.
To choose athletic shorts, focus on three core factors: intended activity (running vs. gym vs. everyday), inseam length (5–9 inches is the sweet spot for most men), and fabric (lightweight, moisture-wicking blends over cotton). A built-in liner, secure pocket placement, and a comfortable waistband seal the deal, but the best pair is the one you forget you’re wearing during a workout.
What length of shorts should you choose?
Inseam length dictates both comfort and performance. For running, most guys prefer a 5-inch or 7-inch inseam, short enough to allow full leg drive but long enough to prevent chafing. A 5-inch short rides high and feels breezy, while a 7-inch offers slightly more coverage and a less aggressive look. For gym training or casual wear, 7 to 9 inches is a safer bet. That length stays put during squats and lunges and feels less revealing if you’re not used to short shorts. A 9-inch inseam is essentially a hybrid between a short and a lightweight pant, ideal for taller athletes. There’s no universal “right” length; try a couple of options to see what lets you move freely without constant adjustment.
Which fabric is best for athletic shorts?
Polyester and nylon blends dominate the category for good reason: they dry fast, wick sweat, and resist odor better than cotton or cotton blends. Look for a fabric with some stretch (often from elastane or spandex) so the shorts move with you, not against you. A 4-way stretch weave is ideal for running and dynamic training. Avoid 100% cotton for any workout that makes you sweat. Cotton soaks up moisture and grows heavy, leading to chafing and that clammy feeling that kills motivation. If you want a softer hand feel, seek out “brushed” polyester or poly-linen blends, they offer comfort without the water-holding downsides of pure cotton.
Do you need a liner in running shorts?
Built-in liners (usually a brief or compression short) are a convenience feature. They eliminate the need for separate underwear and reduce friction where it counts. Many runners prefer a brief-style liner for light support and quick drying, while others favor a longer compression liner for added muscle containment and chafe protection on longer runs. That said, liners aren’t for everyone. If you run ultras or have very sensitive skin, a separate pair of dedicated running briefs or compression shorts paired with an unlined short gives you more control over fit and fabric. For the gym or casual wear, unlined shorts are more versatile because you can wear whatever underwear suits the occasion.
How important are pockets and where should they be?
Pockets matter hugely for convenience, but their placement can make or break a workout. Forward-angled side pockets (often called “drop-in” or “zippered”) keep a phone from slapping your thigh with every stride. A rear zippered pocket is the gold standard for keys and cards, it stays secure and doesn’t bounce. Mesh pockets are fine for a credit card but will let small items slip through. For long runs or trail work, look for at least one zippered pocket. In the gym, standard side pockets are fine as long as they’re deep enough not to spill your phone when you squat. Avoid shorts with huge cargo pockets that flap around; they’re practical for travel but a nuisance during active movement.
What kind of waistband works best?
A flat elastic waistband with an internal drawcord is the most reliable design. It stays put when you run, is easy to adjust, and doesn’t dig in during long sessions. Some shorts use a stretch-knit waistband without a cord; these are comfortable for low-key wear but can slip if the elastic loses tension over time. For serious running, avoid bulky button-and-zipper waistbands found on casual shorts, they add weight and can irritate under a backpack hip belt. If you like a truly secure fit, look for shorts with a silicone gripper inside the waistband to prevent riding up. In all cases, be honest about your waist size: going too small creates muffin top and discomfort, while too large leads to constant pulling up.
How to match shorts to your activity: running, training, or casual?
Running shorts are purpose-built for forward motion: lightweight fabric, a higher cut, minimal pockets, and often a brief or split leg to allow freedom of stride. They prioritize ventilation and weight reduction over durability and cargo capacity. If you run more than a few miles a week, invest in a pair of dedicated running shorts, your legs will thank you. Training shorts (for the gym, HIIT, or weightlifting) need more structure. Look for a slightly thicker fabric that withstands barbell contact and machine abrasion, a 7–9-inch inseam to prevent ride-up, and secure pockets for your phone during sets. Cotton blends or poly-cotton mixes are okay here because sweat exposure is shorter. For casual wear and light activity, anything comfortable works; just avoid running-specific shorts for everyday use because they don’t hold up well to sitting on rough surfaces.
Frequently asked questions
How tight should running shorts be?
They should feel snug at the waist, enough to stay up with no drawcord tension, but not constricting around the legs or hips. You should be able to slide two fingers under the waistband. If the shorts have a built-in liner, it should hold everything in place without pinching.
Can I use running shorts for swimming?
Not really. Running shorts aren’t designed for chlorine or saltwater, and the lightweight fabrics often become translucent when wet. A dedicated swim trunk is better for water, but you can rinse and dry running shorts quickly if you get caught in the rain.
How often should I replace running shorts?
When the elastic waistband loses its grip, the fabric feels paper-thin, or you notice persistent odor that washing doesn’t fix. For regular runners that means every six to twelve months depending on how often you wash and dry them (high heat kills elastic fast). Rotating a few pairs extends their life.
Are split shorts better for speed?
Split shorts, with a vented side seam, offer maximum range of motion and airflow, making them popular for track workouts, 5Ks, and hot weather. They feel very short (typically 2–3-inch inseam) and flap noticeably. For general training or jogging, a standard short without splits is more comfortable and spacious.
What is the difference between compression shorts and brief liners?
A brief liner is a simple pouch that supports and separates; it’s built into the short and dries quickly. Compression shorts are longer (often down to mid-thigh) and provide muscle support, reduce vibration, and help prevent chafing. Compression liners are common in premium running shorts; brief liners are lighter and more breathable.
Do I need to wash new shorts before wearing?
Yes. New shorts often have residual dyes, anti-microbial finishes, or manufacturing oils that can irritate skin during a sweaty run. A cold wash with mild detergent removes those residues and softens the fabric. It also gives the liner a chance to conform to your shape without the risk of irritation on first use.