Yes, Your Girls Need Support
You need to support your A and B cups. Smaller busts do not usually cause back pain but they still bounce with every step you take. And those steps can add up, 10,000 a day! If you don’t wear a sports bra, this can make your breasts sag over time.
What is the smallest size sports bra?
3. Measure your cup size
| Size | Under Bust | Over Bust |
|---|---|---|
| Small | 63-67 | 79-81 |
| 81-83 | ||
| 83-85 | ||
| 68-72 | 84-86 |
What kind of sports bra is best for running?
Healthline’s picks of the best sports bras for running
- SHEFIT Ultimate.
- Nike FE/NOM Flyknit.
- Mate the Label Organic Stretch Sports Bra.
- Brooks Dare Racerback Run Bra 2.0.
- Under Armour Mid Crossback.
- Sweaty Betty Ultra Running Bra.
- Lululemon Run Times Bra.
- Knix Catalyst.
Do I need a sports bra for running?
The breast is only supported by 2 weak structures: the skin itself and ligaments named Cooper’s ligaments and so a good sports bra is needed to give support, prevent breast pain and limit the movement when exercising, especially when running.



