What Are 2-in-1 Running Shorts? (With 6 Reasons To Try Them!)

When I first realized that you could buy running shorts with the liner already built-in, I was pumped. For years, I simply ran in whatever underwear I normally wore along with my running shorts. 2-in-1 running shorts changed the game for me, and I bet they could also work for you! But what are 2-in-1 running shorts?

2-in-1 running shorts give you the benefits and coverage of both traditional running shorts and compression shorts without the bulk of having two waistbands. These two-layered shorts can reduce friction, improve circulation, provide extra protection, allow for better muscle movements, and wick moisture.

Keep reading to learn all the possible benefits of 2-in-1 running shorts and the potential disadvantages.

What do 2-in-1 running shorts include?

Most running shorts are either short and loose or tight enough that they provide support without affecting your stride. Two-in-one running shorts, however, give you the best of both worlds.

2-in-1 running shorts include two layers: one layer of fabric that makes up the outer layer of the shorts and another underneath layer of compression material. You can usually find 2-in-1 running shorts in both 5-inch and 7-inch options.

So why would you get shorts with an extra layer when you could just wear underwear?

Friction, baby!

Waistbands will rub together and materials will rub together. We all know what happens when things rub, especially over the course of many miles – chafing and irritation!

Including both layers in a pair of shorts means you won’t need to buy separate compression shorts or leggings, which may cost more.

These days, you can find 2-in-1 or lined shorts in pretty much any length and with pockets, so you should be able to find something that works for you.

Once I discovered and started using 2-in-1 running shorts, it was a complete game changer. More comfortable, less cost, and lighter laundry hampers!

Benefits of 2-in-1 running shorts

2-in-1 running shorts aren’t just useful for running. In fact, you can use them for pretty much any athletic activity!

There are a variety of benefits when it comes to 2-in-1 running shorts. If you do a lot of running, soccer, baseball, or CrossFit, these shorts might become your favorite clothing.

Benefits of 2-in-1 running shorts include:

  1. Reduced friction
  2. Improved performance
  3. Improved circulation
  4. Better muscle movement
  5. Moisture resistance
Potential benefitHow it helps runners
Reduced frictionLess likely to chafe on waist and thighs
Improved performanceFaster times or longer distances
Improved circulationReduce swelling and improve recovery
Better muscle movementMore comfortable during the run
Moisture resistanceLess likely to chafe, improve cooling
Potential benefits of 2-in-1 running shorts and how they help runners

Reduced friction

One of the main benefits of 2-in-1 running shorts is the fact that they reduce the friction between the fabric and your skin, especially on parts like your waist, thighs, and crotch.

Shorts that are made from coarser fabrics are more likely to move around and rub against your skin which causes chafing and rashes. By including the compression shorts as an internal layer, the fabric will sit snugly against your skin and ensure a tight fit, thus removing the potential of too much rubbing.

This also helps you maintain the overall hygiene of the sensitive parts of your skin to avoid pain, discomfort, and infection.

Improved performance

How can a piece of fabric improve your performance while running or exerting yourself physically?

Performance benefits with running shorts are usually subjective, but many runners report that they are able to run more comfortably for longer periods with lined running shorts.

Because of the chafing reduction, these shorts can also allow you to endure the exercise for a bit longer than you might be used to with regular shorts.

Improved circulation

Compression sleeves are usually recommended to increase blood flow and reduce swelling for people with poor circulation both during activity or afterward, for recovery.

Blood circulation improves a bit due to the inner compression layer of the 2-in-1 running shorts. Because of this inner layer, the muscles receive an improved level of oxygen that can allow them to function better.

This can also help the circulation of blood and oxygen to various other parts of the body, which can improve your recovery times as well.

Better muscle movement

Muscles perform better when they have better access to blood and its nutrients and oxygen levels.

Compression liners can slightly increase your performance potential by properly compressing your muscles. The verdict is still out; however, whether compression gear like this makes any noticeable difference in performance.

It’s also possible that compression clothing can help a bit with soreness, aches, and general recovery.

Moisture resistance

Running tends to produce a lot of sweat, which can be a big problem for runners as it can cause skin irritation, add weight to your running clothes, and generally make running less enjoyable.

Since the outer and the inner layer of 2-in-1 shorts are made from materials like spandex, nylon, or polyester, the sweat resistance level tends to be much higher. These materials manage to get rid of sweat much more quickly through evaporation.

Potential disadvantages of 2-in-1 running shorts

Despite the numerous advantages that 2-in-1 running shorts seem to offer, there are still a few disadvantages. These will help you understand which way the scale tips in terms of the final performance so that you can make an informed choice.

Here are some potential disadvantages of 2-in-1 running shorts:

  • Layering – Since 2-in-1 shorts already have an internal layer, they serve as underwear on their own. When worn with that additional layer, discomfort, and chafing are possible.
  • Material – Soft, breathable fabrics make 2-in-1 running shorts feel great against the skin during a run.
  • Cost – They can be a bit more expensive than other shorts.

It is clear that there are many more benefits of 2-in-1 running shorts compared to the disadvantages. If you’re a serious runner, they’re definitely worth a try!

Best 2-in-1 running shorts [according to Reddit]

What is the point of 2-in-1 shorts?

The point of 2-in-1 shorts is to provide the benefits of both a liner or compression underwear and running shorts in one package. Lined running shorts can provide increased support and comfort while reducing irritation and overall weight.

Are 2-in-1 shorts worth it?

2-in-1 running shorts are worth it for serious runners that are running for long distances and/or at faster paces. They can be very cost-effective, reduce laundry, and provide performance benefits.

Why do runners wear split shorts?

Some runners choose split shorts because they are the smallest, lightest, and least restrictive type of shorts that you can find. Split running shorts can potentially improve a runner’s performance at the highest levels.

What are the different types of running shorts?

The most common types of running shorts are split shorts, v-notch shorts, compression shorts, and 2-in-1 or lined shorts.

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