For athletic breasts, which typically have a shallower shape and less fullness at the top, you'll want bras that provide support without excessive padding.
Racerback bras can provide extra support and help distribute the weight evenly across the shoulders, making them a good choice for athletic builds.
Lightly padded bras can offer a bit of shaping and coverage without adding unnecessary bulk, making them suitable for athletic breast shapes.
Bralettes with a simple, unlined design can provide light support and are comfortable for everyday wear.