If you’ve ever picked up a pair of shorts that’s specifically made for running, you’ll notice that most have a liner inside that resemble a pair of underwear. Some people may find this irritating, while others have become so accustomed to it that they don’t really know any different. Either way, it can be confusing to know whether or not you should wear underwear with this type of running shorts.
Running shorts that have a liner are intended to be worn without underwear. The liner provides similar support and protection to underwear so you don’t have worry about another piece of clothing during your run. Wearing underwear with this type of running short can often be uncomfortable and lead to chafing, but that’s not true for everyone.
Even though these running shorts were constructed this way on purpose so you could skip wearing your undies, there are no underwear police going around telling you what to do. Ultimately it’s what you find to be the most comfortable…hopefully this article will help you be the most comfortable on your next run.
Are you supposed to wear underwear with running shorts?
There is no hard and fast rule written in a running bible anywhere that says you should or should not wear underwear with running shorts. Though the shorts we typically think of as “running shorts” usually have a built-in liner that is there to serve as your underwear. But these days there are lots of types of running shorts so it really depends on which kind you’re choosing.
Here’s a rundown of each type of short and if they are (or aren’t) a good choice for wearing without underwear. Though the decision is really up to you.
Lined Running Shorts
Most loose-fitting running shorts come with a liner/built-in underwear and you can find them from all of the top brands. The liner resembles brief-style underwear and is usually mesh or another thin, breathable material that helps keep you cool. These were designed to be worn without underwear. Wearing them with the wrong type of underwear can lead to some bad chafing.
Less common, but becoming increasingly popular are running shorts that are instead lined with more of a boxer-brief style or what I like to call for women “booty shorts.” Some have a thicker liner than others, but they all have a bit of compression which makes them a good choice to be worn without underwear.
Compression Shorts
Compression shorts aren’t always marketed as running shorts, but they can be a great choice for both male and female runners. They come in various lengths so you can choose what makes you the most comfortable and goes with your personal style. The long ones, which they have for both men and women, can be great for preventing “chub rub.” (Hurts just thinking about it.)
Because these are so tight already, there’s really no reason to wear underwear with them unless you want to. Women can opt for a thong which will feel pretty unnoticeable, but guys will have a hard time finding underwear that work well unless opting for an athletic brief such as these from Runderwear. Some people also like to wear compression shorts in place of underwear under an unlined pair of running shorts.
Unlined Running Shorts
True running shorts that don’t come with a liner are harder to find, but they are out there. If you are someone who prefers to wear your own underwear with your running shorts, definitely keep an eye out for this style. Unlined running shorts offer the best performance and comfort when paired with your own set of underwear.
RELATED: The Best Running Underwear to Prevent Chafing for Men and Women
Why are there built-in underwear in running shorts?
Most running shorts have built-in underwear so that you can skip wearing your own underwear while still getting the benefits that underwear provide. But unlike most underwear that’s not made with running in mind, the liner inside a pair of running shorts is designed for fast movement and sweat. Moisture-wicking fabrics such as polyester keep you dry and the bit of stretch from fabrics like elastane easily move with you.
It makes sense to have a built-in liner in men’s running shorts to keep “everything” tucked in, but women’s running shorts usually have them, too.
Perhaps the running shorts designers also had convenience in mind when they created these as it sure is nice to have one less piece of clothing (ahem, laundry) to worry about.
Is it bad to not wear underwear when running?
So you’re wondering about running commando…some of us worry about this more than others, I’m sure. Most people are of the mindset of “you do you” and if you like running without underwear (whether your shorts have a built-in liner or not) then that’s what you should do.
It’s not bad to go without underwear when running if that’s what you find most comfortable and as stated, that’s what those liners are there for afterall. But you may find that there are downsides to going without with these being the most common downsides:
- a loose fitting liner won’t keep everything snug
- an ill-fitting liner may lead to chafing in your most sensitive areas without the added barrier of underwear
- sweat and any other “leakage” you may experience may not be as well contained
- it feels strange and maybe a bit icky if it’s not what you are used to
If you’re feeling strange about running without underwear, I’m here to tell you it’s totally fine as long as that’s what you are most comfortable doing. Though I will say if you’re going sans underwear in running shorts that aren’t either lined or a compression fit, just be aware of what may become visible if you’re not careful. And I’m not a man, but my guess is this free-flying action wouldn’t probably be that enjoyable…though apparently the athletes all competed naked in the Ancient Greek Olympics, so perhaps I’m wrong on that point.
Don’t like the built-in underwear? Do This
The majority of runners seem to be comfortable wearing lined running shorts whether they choose to wear them with underwear or not. But if you don’t like it, you have choices.
- The option that makes the most sense is to just buy running shorts that don’t have built-in underwear. The compression shorts discussed above can be a great option and if you look hard enough, you can even find traditional running shorts that are unlined.
OR…
- Grab a pair of scissors and cut that liner right out. If you already have a pair of running shorts that has this and it’s bothering you, it’s easy enough to snip it away without ruining the shorts. You can also use this method if there’s a pair of lined shorts you’re eyeing that you want to be unlined.
Easy peasy, right?!
Can you wear a thong while running?
Many women who prefer to wear underwear when they run decide to wear a thong instead. These pair nicely with running shorts that have a liner because you don’t have to worry about a whole other layer of clothing on your backside.
They are also a good go-to for any compression running shorts because you don’t end up with visible panty lines. Though I would encourage you to get a good quality pair of shorts made from thicker material – they’ll give better compression while being more flattering on the booty IMO. (Here are a favorite pair of mine I wear with a thong and they are a great price, too!)
I will say, though, as with any underwear you choose, you still need to be careful which ones you wear otherwise you’ll end up with really terrible chafa*ge. This post gives my top recs of all running underwear.
Wear underwear or don’t…it’s really up to you!! If you find that one way is making you chafe or doesn’t feel good, I’d recommend giving the opposite route a try!
FAQs
No the liner is basically underwear. Running shorts with liners are designed to wick sweat from your body and easily allow it to evaporate. If you add a layer of cotton underwear, the fabric in the shorts can't do its job of wicking the moisture away and the cotton underwear soaks up the moisture and retains its.
Do you wear underwear with performance shorts? ›
Whether or not you should wear underwear under your compression shorts really just boils down to your personal preference. Even when certain compression shorts are designed as outerwear, the athlete wearing them may prefer to forego underwear underneath them. There's no problem with doing so.
Do you wear underwear under tight running shorts? ›
If you're new to running, it may surprise you to learn you're not supposed to wear underwear under your running shorts. An inner lining is instead provided to keep you secure and comfortable, and wearing another layer of underwear underneath can cause chafing and discomfort.
Should I wear underwear running a marathon? ›
To reduce the chances of infections it is best to wear underwear that is made of more natural fibres or has sweat-wicking properties, or run without underwear. The looser your running shorts the better it is for reducing the chances of moisture and bacteria build up.
Do you wear underwear marathon? ›
It's not bad to go without underwear when running if that's what you find most comfortable and as stated, that's what those liners are there for afterall. But you may find that there are downsides to going without with these being the most common downsides: a loose fitting liner won't keep everything snug.
Is it OK not to wear underwear under shorts? ›
It reduces the chances of irritation and injury
Wearing a loose, comfortable pair of jeans or shorts without underwear can actually reduce chafing to your genitals.
Do runners wear underwear? ›
If you have ever worn natural-fiber fabrics such as cotton, you know all too well the feeling of being heavily saturated with sweat at the end of your workout. Especially during long runs, you want performance underwear that will keep up with you and go the distance for a distraction-free workout.
What do you wear under shorts when running? ›
Lightweight brief liners are popular with many under bike shorts, basketball shorts, training shorts, running shorts or gym shorts where you prize your freedom of motion. Compression liners provide more muscle support and also guard against chafing.
What underwear to wear for marathon? ›
Avoid cotton underwear for running, since it absorbs moisture and holds onto sweat. Opt for smooth and stretchy fabrics that are quick-drying and will wick away sweat, such as polyester or nylon, to keep you dry and comfortable.
Do runners not wear underwear? ›
The point is, if you don't need underwear, don't bother. If you would like a little extra protection, do, but don't wear cotton. Underwear should be snug and made of synthetics or wool. Also, when you are done with your run, take off those nasty wet shorts.
The fabric promotes airflow to help you stay cool when your run heats up. Sweat-wicking technology can help fight the build-up of moisture to keep you feeling light and ventilated. For colder climates, wearing running tights can keep your muscles warm.
Should you run a marathon in leggings or shorts? ›
Leggings will better insulate your legs while you are outdoor, keeping your muscles warm and helping to retain your body heat. But when it is too hot outside you should consider wearing shorts. The best leggings for running are seamless. They are compression, comfortable, lightweight, and durable.
What should you not do before a marathon? ›
Tips from the Pros: 12 Things Never to Do in a Marathon
- Don't blow your regimen right before the race. ...
- Don't worry about sleeping the night before—worry about sleeping two nights before. ...
- Don't spend too much time at the pre-race expo. ...
- Don't wear new shoes. ...
- Don't turn into a head case on race day. ...
- Don't forget to lube.
Avoid high-fiber foods the day before if you know your stomach is sensitive. Cook your vegetables, peel your fruit or choose fruit juice, and avoid high-fiber grains and vegetables. A big breakfast on race morning might cause stomach upset. Instead, try to eat at least an hour before the race.
How do you not pee during a marathon? ›
Hydration is crucial to proper urinary system health, so make sure you give your body enough water after a run or exercise. Healthcare experts recommend that women drink around 11.5 cups of water a day. Just make sure you don't drink too much water before going for a run.
Where do runners pee during marathon? ›
Most marathons have portapoties along the route (usually at water stations). You duck in and do your business as fast as you can, then get back to the race. If there's no portapoties nearby some runners will stop and go just off the route. Some runners will just go in their shorts (gross), not missing a stride.
Are marathon runners better in bed? ›
“The oxygenation of blood plays a huge role in arousal – people who work out, especially with cardiovascular exercise, are going to have much better vascular health and better flow to the genitals.” Running can make you a better love in other ways too.
Do guys wear underwear under running tights? ›
Running tights are usually designed to be worn without underwear - it can be uncomfortable to wear an extra layer underneath an already close pair of tights. Of course, you can wear underwear if you find that more comfortable.
Why do men's running shorts have liners? ›
MEN'S RUNNING SHORTS
The built-in liner usually offers more support in the groin, so a jockstrap is not a necessity. These details create a design that is better suited for the male body. They can also help prevent discomfort or chafing.
Why is it healthier to not wear underwear? ›
Health Benefits of Sleeping Without Underwear
Sleeping with covers, tight-fitting pajamas or clothes, and underwear can lead to even more moisture buildup. Wearing underwear keeps that moisture close to your genitals. This allows bacteria and yeast to grow, which can cause infection and other problems.
Tight-fitting pants reduce friction between your skin and the fabric, as well as between the skin on both legs, says Dr. Hadley King, an NYC-based dermatologist. Also look for smooth seams or seamless pants to prevent rubbing, Dr. King says, and make sure to choose moisture-wicking fabric.
What kind of underwear do male runners wear? ›
Comfortable Fabric – What your underwear is made of matters a lot. Cotton boxer briefs might feel great for day-to-day wear, but they're not a good choice for running. Your best bet is a synthetic fabric blend. Stays Put – Since you want a chafe-free running experience, you need a pair of underwear that stays in place.
Do you wear underwear under bike liner shorts? ›
The chamois inside of your shorts was made to fit next to your skin to prevent chafing, and it's built from fabrics that wick moisture and dry quickly. Wearing underwear under your bike shorts adds seams that chafe and fabric that holds in moisture, so your best bet is to go commando when you're in the saddle.
What is the point of liners in running shorts? ›
While men's and women's running shorts feature designs with liners, not all styles have them. Running shorts with liners have their benefits, though. They provide support and moisture management that allow you to forgo wearing underwear. There are also running shorts without liners, if you find them uncomfortable.
Do you wear underwear with lined swim trunks? ›
Your swim trunks will most likely have an inner mesh lining. The whole purpose of this is to made sure the you don't need any underwear. The mesh lining is there to offer you the support and comfort you need when at the beach or pool. Wearing underwear will just add another layer and make it more uncomfortable.
Why do all running shorts have liners? ›
Running shorts with liners are intended to make you feel comfortable while running without underwear. Wearing underwear while running may cause chafing and be uncomfortable. Liners help ventilation to keep you dry and prevent rubbing while you are in constant motion.
Should you wear underwear with spandex shorts? ›
You can wear some underwear on condition that spandex garment does not have any crotch pad, liner or some other means that keeps ones crotch private. One may not need to wear underwear if the fabric is thick sufficiently or if the piece of clothing has built in one to account for it.
Do you wear padded bike shorts over underwear? ›
Do I wear underwear with padded bike shorts? The answer is yes when you're trying it on in the store. But no when you're actually riding. A chamois should be worn against your skin—wearing underwear adds seams, reduces breathability, and restricts your movement, reversing your chamois' benefits.
Do you wear underwear under skins? ›
DO I NEED TO WEAR UNDERWEAR UNDER SKINS? SKINS can be worn with or without underwear. It's entirely up to you.
Why do running shorts have two layers? ›
'2-in-1 shorts have a longer inner layer which can help prevent chafing, and cover modesty if you don't like wearing something too short,' says Stewart.
