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How to choose the right sports underwear for your type of workout
Sports underwear combines function and comfort, but which style works best for each workout? Boxers, trunks and briefs have different silhouettes and leg lengths that affect how they feel during training. Your choice largely comes down to personal preference, the underwear style you like most and how much coverage you want, but the type of workout also plays a part. Here are our tips for finding the right sports underwear for your training.
Why sports underwear makes a difference
Sports underwear provides comfort and function for all your workouts, whether you are running, lifting weights or completing an intense HIIT session.
Björn Borg sports underwear stays securely in place, features flat seams to prevent chafing and is made from materials that wick away moisture and help keep your skin dry, so you can focus fully on your workout.
The benefits of our sports underwear
A dry feeling throughout your workout thanks to moisture-wicking and quick-drying materials
Comfortable support and stretch for freedom of movement and a flexible fit
Smooth seams to prevent chafing
Different styles and leg lengths provide varying levels of coverage and ventilation, helping you find the right underwear for every workout
Boxers, trunks or briefs - which style should you chooose?
Sports underwear styles
Boxers for more coverage during your workout
Boxers have longer legs than trunks and briefs, providing more coverage over the thighs. The close fit offers support, while the stretchy material moves with you through running strides, squats and other explosive movements.
Many runners prefer the longer leg length for extra coverage and comfort. It can also be an advantage if you are prone to chafing between the thighs.
Sports boxers are ideal for you if you:
Want more coverage over the thighs.
Prefer a secure fit with a supportive feel.
Are prone to friction between the thighs.
Run longer distances or do workouts with lots of movement.
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Trunks with shorter legs and a flexible feel
Trunks have the close-fitting feel of boxers but with a shorter leg length. They use less fabric around the thighs while still providing good support and coverage. This makes them a comfortable style for many different types of training.
The short legs make trunks easy to wear under training shorts, tights and workout trousers. They are a versatile choice for the gym, working equally well for heavy strength sessions and cardio on the treadmill.
Trunks are ideal for you if you:
Want a balance between coverage and freedom of movement.
Prefer short legs with less fabric.
Alternate between strength training and cardio.
Switch between loose-fitting shorts and tights.
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Briefs for maximum freedom around the legs
Briefs have no legs, leaving the thighs completely free. This creates a lightweight feel with minimal fabric that can fold or ride up during training. The style works well under short training shorts, tights and other slim-fitting garments.
Briefs are a good choice for strength training and explosive exercises where you want to move your legs freely. If you often experience friction between your thighs, boxers with longer legs may be a better option.
Briefs are ideal for you if you:
Want as little fabric as possible around the thighs.
Prioritise freedom of movement during strength training and explosive exercises.
Like training in short shorts or close-fitting tights.
Do not need extra protection against friction between the thighs.
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Which sports underwear is best for running?
Running involves repeating the same movement thousands of times, so it is important that your underwear stays securely in place without slipping, folding or causing uncomfortable friction. Quick-drying materials and smooth seams also help maintain a comfortable feeling throughout your run.
Long-leg boxers are a good choice for longer runs because they cover more of the thighs and can therefore reduce friction between them.
Trunks suit runners who want support but prefer a shorter leg length. Briefs can also work well if you want minimal fabric and are not usually prone to chafing between the thighs.
Our tip: For longer distances or runners who are prone to chafing, long-leg boxers are a good first choice. For shorter runs and intervals, trunks or briefs can also provide the right combination of support and freedom of movement.
Find the right sports underwear for the gym
At the gym, your underwear needs to stay in place as you bend, stretch and rotate your body. At the same time, it should be flexible and move with you through exercises such as squats, lunges and deadlifts.
The shorter leg length of trunks provides a comfortable feel, while the close fit offers support during both strength exercises and cardio.
If you prefer more coverage, boxers are another excellent option and work particularly well under loose-fitting training shorts. Briefs suit anyone looking for maximum freedom around the legs, for example during strength training. They also work well under both training tights and shorter shorts.
Sports underwear for HIIT and functional training
HIIT, circuit training and functional workouts often involve rapid transitions between jumps, running, burpees and strength exercises. A secure, flexible fit is important, allowing your underwear to move with your body without needing adjustment between exercises.
Boxers provide a secure feel and more coverage during movement-intensive workouts. Trunks are a good option if you prefer shorter legs, while briefs provide maximum freedom around the thighs. Whatever style you choose, good stretch, ventilation and a secure fit are what matter most.
Quick guide – choose sports underwear for your needs
More coverage over the thighs: Boxers.
Less friction between the thighs: Long-leg boxers.
A good balance between support and freedom of movement: Trunks.
Minimal fabric around the legs: Briefs.
For longer runs: Long-leg boxers.
For varied gym training: Boxers, trunks or briefs.
Under close-fitting tights: Briefs or trunks.
For HIIT and explosive workouts: Choose the style that you prefer and that stays8 comfortably and securely in place on your body.
The right sports underwear for you
The perfect style for you is the one that feels comfortable, stays in place and lets you focus on your workout. Shop our men’s sports underwear and choose between boxers, trunks and briefs for your training.