TOP 5 Tips for Choosing the Best Sports Bra for Optimal Performance

Sports Bras are an essential item for every active woman. Choosing the right bra for your body not only ensures comfort but also directly affects your health and workout performance. Many people assume all sports bras are the same, but in reality, each design serves a different purpose.

In this comprehensive guide, you'll learn how sports bras impact breast health and discover key tips to find the perfect fit. Let’s explore with Under Armour!

1 - The Underband – The Most Important Feature of a Sports Bra

If you've ever wondered why your bust still "bounces" while running, jumping, or working out, the culprit is likely an insufficiently supportive underband. The underband wraps around your back and provides the primary support for a sports bra. If it's too loose, it won’t effectively hold your bust in place during exercise.

The underband is the most crucial part of a sports bra

(Image 1 - The underband is the most crucial part of a sports bra)

A key rule is that the underband should not stretch more than 5 cm when pulled. It should fit snugly without causing discomfort or restricting your breathing during movement.

2 - Always Check the Cup Fit

A sports bra should provide a secure fit not only at the underband and straps but also in the cup area. If breast tissue spills over the sides or top of the cups, it means the bra is too small and won’t offer optimal support during exercise. This can also cause discomfort and distraction while working out.

(Image 2 - Ill-fitting cups can reduce workout performance)

To find the right cup size, follow these steps:

  • Measure your bust: Use a measuring tape to measure around the fullest part of your bust while keeping the tape parallel to the floor. Round to the nearest centimeter.
  • Measure your underbust: Measure directly under your bust and round to the nearest centimeter.
  • Calculate your cup size: Subtract the underbust measurement from the bust measurement to determine your cup size. Example: 91 cm - 86 cm = 5 cm → Cup B → Recommended size: 86B.

3 - Test Your Sports Bra During Movement

If your sports bra shifts or rides up during workouts, it may have lost its elasticity over time. When the elastic support weakens, the bra won’t provide the same level of support as when it was new.

A well-fitting sports bra should allow you to move comfortably while keeping everything secure. When trying on a sports bra, jump up and down or move around. If the underband rides up, it might be too loose. If you need to tighten the straps significantly to keep the bra in place, it may not be the right fit for you. Make sure the bra hugs your body while remaining comfortable during movement.

A properly fitting sports bra ensures comfortable movement

(Image 3 - A properly fitting sports bra ensures comfortable movement)

Additionally, choose a bra based on the intensity of your workout. For yoga or low-impact activities, a lightly supportive bra will provide breathability and comfort. For high-impact activities like running, opt for a bra with a thick, sturdy underband and high support to keep you comfortable and well-supported.

4 - Check the Center Panel of Your Sports Bra

The center panel of a sports bra (also known as the "center front") should lie flat against your chest. If it doesn’t, there are two possible reasons:

  • First, the bra doesn’t fit you properly. This can happen if the underband is too loose or the cup size is too small.
  • Second, your breast shape may be a factor. Some breast shapes with wider roots may find it challenging to wear bras with narrow center panels. If this applies to you, choose designs with a wider center panel that sits flush against your chest for the best fit and support.

The center panel of a sports bra should fit snugly
(Image 4 - The center panel of a sports bra should fit snugly against the chest)

5 - Shoulder Straps Should Be Secure Yet Comfortable

The straps of a sports bra need to be secure enough to hold everything in place while still providing comfort.

Adjusting the straps on each side of the bra doesn't necessarily have to be the same

(Image 5 - Adjusting the straps on each side doesn’t necessarily have to be the same)


According to Professor Joanna Wakefield-Scurr, up to 97% of women have one breast larger than the other. Therefore, strap adjustment does not have to be symmetrical. If one side of your chest feels better supported than the other, try adjusting the strap length to achieve balance.

6 - Choosing the Right Sports Bra for Your Workout

A sports bra not only helps you feel comfortable and provides optimal support but also keeps your body dry throughout your workout. With countless options on the market, how do you know which sports bra is right for you? Let’s explore how to choose a sports bra based on your workout type!

6.1 - UA Smartform Sports Bra

UA Smartform Sports Bra adapts to your movements

Perfect Fit

The ultra-flexible UA SmartForm fabric molds to your body shape, making it ideal for those with uneven breast sizes, in-between sizes, or body changes due to natural cycles.

Lightweight Support

Integrated soft padding provides just the right amount of coverage and support without adding unnecessary bulk.

Maximum Comfort

Flatlock seams and ultra-light breathable mesh in high-sweat areas keep you cool and comfortable from warm-up to cooldown.

6.2 - UA Infinity Sports Bra

UA Infinity Sports Bra

Moves with Your Body

The seamless molded structure mimics natural movement, providing continuous support during every workout.

Light & Breathable

Quick-drying padding with a hollow design reduces weight and enhances maximum breathability.

Easy to Wear & Remove

Smart zipper design allows for easy wear and removal while ensuring secure support throughout your workout.

A well-fitted sports bra that moves flexibly with your body will help you perform at your best, whether you're running or playing tennis. Don't wait any longer—visit Under Armour's website now to find the perfect sports bra for you!