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A cup

What to look forA lightly padded shaper bra.

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You don’t need superstrong support, yet a lot of A-cups go for curve-crushing styles anyway.

Why not feel more feminine?

“Even no-nonsense athletes try on shapers and say, ‘I like this,'” Lawson says.

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Padding also helps dim headlights.

(High beams are more of an issue for small chests, which have less tissue around nipples.

)What to avoidA loose rib band and gaps and folds in the fabric.

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Too-big bras won’t move with you, which can lead to chafing on skin and nipples.

TESTERS’ RESULTS

“Zero bounce and more curves!

Plus, the fit felt greatno chafing.”

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Perfect Core Bra, $54;Lucy.com

“Great bra.

Doesn’t make me look like a boy, even though padding is light.”

Asics Abby Bra, $42;AsicsAmerica.com

“Nice separation!

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It’s more comfortable than being smashed down.”

Try on several styles and sizes to find a snug but comfy fit.

What to avoidIn your search for more support, don’t buy a bra that’s too tight.

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If the seams dig into the skin around your armpits, for example, move on.

“Supportive but not tight.”

“C-cups often vary more in shape,” Lawson says.

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Some naturally have more mammary tissue, others are voluptuous due to a higher percentage of body fat.

Customization allows you to get the best fit and support.

“Cs also seem to prefer underwires, which anchor the breasts,” Lawson says.

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What to avoidLow-cut styles.

“A super comfortable, supportive fit for my 7-mile run.”

Moving Comfort Juno Bra, $52;MovingComfort.com

“The underwire makes a big difference.

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Champion Seamless Underwire Sports Bra, $42;ChampionUSA.com

“Almost no movement during my run.

Love the adjustable straps.”

Large breasts put a lot of tension on straps and, by extension, your shoulders.

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These features redistribute the weight.

Less stretch also minimizes bounce, while wider rib bands help secure the bra and your boobs.

What to avoidStraps that sit far apart on shoulders.

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Bringing the straps inward can help decrease bounce by up to a centimeter, Lawson says.

(Every little bit counts!)

“I was comfortable enough to actually start running, and I lost more than 30 pounds!”

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Ultra Support Bra, $70;CW-X.com