How to Choose the Right Sports Bra — A Complete Guide

Not all sports bras are designed for the same purpose. Before purchasing a sports bra, consider the following factors:

Your Activity Level

Different workouts create different levels of breast movement. Running, jumping, and high-intensity training require significantly more support than yoga or walking.

Your Bust Size

Women with larger busts often require additional support features such as encapsulated cups, wider straps, reinforced bands, and adjustable fittings.

Comfort

The best sports bra should feel secure without being restrictive. Look for breathable fabrics, smooth seams, and moisture-wicking materials that keep you comfortable during exercise.

Fit

Even the highest-quality sports bra won't perform properly if it doesn't fit correctly. A well-fitted bra should provide support without digging into your skin or restricting your breathing.

Support Level

Sports bras are typically categorised as low, medium, or high impact. Matching your support level to your activity is essential for comfort and performance.

One of the most important factors when choosing a sports bra is understanding how much support your activity requires.

High-Impact Activities (Running, HIIT, CrossFit)

High-impact exercise creates the greatest amount of breast movement.

Examples include:

• Running
• HIIT workouts
• CrossFit
• Netball
• Tennis
• Aerobics

For these activities, a high impact sports bra is essential.

Features to look for include:

• Maximum bounce control
• Adjustable straps
• Encapsulation support
• Secure underband
• Full coverage cups

If you're searching for the best running sports bra or a reliable sports bra for running, prioritise support over style. Running places significant demands on breast tissue, making high-impact support critical for both comfort and long-term breast health.

For additional running-specific recommendations, see our guide: /blogs/fit-experts/the-best-sports-bras-for-running.

Medium-Impact Activities (Cycling, Hiking)

Medium-impact activities involve movement but generally less repetitive vertical motion than running.

Examples include:

• Cycling
• Hiking
• Strength training
• Dance classes
• Rowing

A medium-support sports bra often provides sufficient support for these activities.

Look for:

• Comfortable compression
• Breathable fabrics
• Adjustable straps
• Moderate support structures

Many women find medium-impact bras offer an ideal balance between support and comfort for everyday workouts.

Low-Impact Activities (Yoga, Pilates, Walking)

Low-impact exercise involves minimal breast movement.

Examples include:

• Yoga
• Pilates
• Stretching
• Walking
• Barre

Low-support sports bras prioritise comfort and flexibility.

Key features include:

• Soft fabrics
• Lightweight construction
• Wire-free support
• Comfortable stretch

Even during low-impact activities, a properly fitted sports bra can improve comfort and reduce strain.

Sports bras generally fall into three main categories.

Even the most supportive sports bra won't perform properly if it doesn't fit correctly.

How Should a Sports Bra Fit?

A sports bra should feel firm and supportive without causing discomfort.

You should experience:

• Minimal breast movement
• No digging or pinching
• Comfortable breathing
• Full breast coverage
• Secure support during movement

A properly fitted sports bra should feel more supportive than your everyday bra.

Band Fit

The band provides the majority of a sports bra's support.

A well-fitting band should:

• Sit level around the body
• Feel snug but comfortable
• Stay in place during movement
• Not ride up at the back

If the band moves during exercise, it may be too loose.

Cup Fit

Your breasts should sit fully inside the cups without:

• Overflowing at the top
• Escaping at the sides
• Gaping or wrinkling

If you're experiencing spillage or movement, consider adjusting your cup size or choosing a style with greater coverage.

Check Your Size Before Buying

Because sizing varies between brands and styles, it's worth checking your measurements regularly.

Use our comprehensive Bra Size Chart to help determine your ideal fit.

If you're unsure of your size, a professional fitting can also help identify the best support level and style for your body.

Women with larger busts often require additional support features to remain comfortable during exercise.

If you wear a D, DD/E, F, or G cup, look for:

• Encapsulation support
• Wider straps
• Reinforced underbands
• Adjustable closures
• Full-coverage cups

A larger bust experiences greater movement during exercise, making proper support essential for reducing discomfort and improving workout performance.

For a more detailed breakdown of sports bras designed specifically for fuller busts, see our guide: Sports Bras for Large Busts — High Impact Guide.

Choosing the right support level becomes even more important for women participating in high-impact activities such as running, HIIT, and team sports.

One of the most common questions shoppers ask is whether underwire is necessary in a sports bra.

Wire-Free Sports Bras

Benefits include:

• Flexible comfort
• Reduced pressure
• Lightweight feel
• Suitable for everyday wear

Many women prefer wire-free styles for yoga, gym sessions, and all-day comfort.

Underwire Sports Bras

Benefits include:

• Additional lift
• Enhanced shaping
• Improved support for larger busts
• Better separation

Modern underwire sports bras are specifically designed for movement and often include padded channels that improve comfort during exercise.

The right choice ultimately depends on your activity level, support requirements, and personal preference.

Bendon offers sports bras designed to support women across a range of activities and cup sizes.

How tight should a sports bra be?

A sports bra should feel firm and secure without restricting breathing or causing discomfort. The band should sit snugly around the rib cage, and the cups should fully contain breast tissue without creating pressure points.

What is the best sports bra for running?

The best running sports bra provides high-impact support, minimises bounce, and offers a secure fit. Features such as encapsulation, adjustable straps, and reinforced underbands are particularly important for running.

Are sports bras good for everyday wear?

Yes. Many women wear sports bras for everyday comfort, particularly wire-free styles. However, support needs vary, and some people may prefer the shape and fit of traditional bras for daily wear.

Choosing the right sports bra isn't just about comfort—it's about ensuring you have the support needed to move confidently through every workout. Whether you're searching for a high impact sports bra, comparing running sports bras, or looking for the best sports bra NZ shoppers recommend, the right fit and support level can make a significant difference.

By matching your sports bra to your activity, understanding the different support styles available, and prioritising proper fit, you'll be able to find a sports bra that helps you perform at your best while staying comfortable every step of the way.