One-piece swimsuits are the only sensible choice for lap swimming and water aerobics

Yes, a one-piece.

Bikinis shift, ride up, and can fall off with the wrong dive or kick. For lap swimming and water aerobics, you want zero distraction. A one-piece with a snug fit stays put.

Look for chlorine-resistant fabric (usually polyester or a nylon blend with spandex). Avoid cotton — it soaks up water, gets heavy, and disintegrates in chlorine. A racerback cut gives you full shoulder mobility for strokes and arm exercises.

Don’t go too tight — it’ll dig in and chafe. Don’t go too loose — it’ll bag and slow you down. If your suit takes more than a second to adjust mid-lap, it’s the wrong one.

Your workout is hard enough without worrying about your swimwear.