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How Does Swimwear Impact a Swimmer's Performance?

Adam Nakada

It's About Physics

When you go swimming, one thing that slows you down is the drag of your body, or what you're wearing. This means that when you are in the water, the kind of swimwear you have can slow you down by creating more drag, or speed you up by reducing drag. One reason swimmers are always very physically slender is to reduce drag. Research published in the February edition of “Medicine and Science in Sports and Exercise” demonstrated that wearing swimsuits made of different materials can increase or reduce drag by around 10 to 15 percent.

Making It Easier

Swimming is a very energetically expensive form of exercise. Reducing the drag of your body not only makes you faster, it also makes it easier to swim at the same speeds. Consequently, if you were wearing the correct swimsuit, you may be able to swim faster and farther. This has implications for relay team events as well as maximal sprint events.

A Matter of Technology

NASA and several universities carried out research that led to development of faster swimsuits. The scientists studied some of the fastest swimming marine animals and tried to mimic their abilities with technology. The resultant product was made out of polyurethane, which reduces drag significantly and allows the swimmer to be faster. Traditional swimsuits are typically made from lycra, which absorbs air and water, consequently slowing you down in the water.


The swimsuits that enable swimmers to swim at very high speeds were developed originally in 2008 by Speedo and NASA. The very first suits were called LZR and within the first week of their launch, swimmers broke three world records wearing them. Later, at the FINA world championships in Rome, swimmers wearing the new suits set 29 world records in only five days. Consequently in 2010, FINA, the governing body for swimming, banned use of the suits. The use of technology to make swimsuits better continues to be a controversial topic.

How Does Swimwear Have an Effect on the Swimmer's Performance?

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