9.3/10

Most women wear the wrong bra size, which can reduce stride length and increase fatigue during exercise. Use a flexible tape measure to find these two numbers: Sports Bras: Sizing & Measuring | REI Expert Advice

Buying a sports bra online offers a massive variety of styles, inclusive sizing, and often better deals than physical stores. However, since you can't try it on first, success depends on accurate measurements and understanding support levels.