This #ProTip comes from Nashville Provider, Kurt Rutkowski.
Athletic clothing can be tricky, but there are a few basic rules. First, as always check the manufacturer’s instructions. They are usually pretty detailed. Just keep in mind, because these fabrics are great at "moisture wicking"- all the sweat that it pulls away from the body is held in the garment.
Use Hot Water
The mistake that most people make is washing athletic wear in cold water. Cold water will not kill the bacteria. Athletic wear in general should be washed separately in hot water. Most manufacturers recommend no bleach and to wash with “athletic wash”. Tide makes a sport wash and there is another brand sold at most sporting good stores called win. Both work well, however in my experience if you use a regular liquid laundry detergent and wash on hot, you won’t have a problem. Bleach can be harsh on these fabrics and will cause the fabric to grey, so it's best to avoid.
Drying performance fabric on high heat can result in fabric shock (wrinkling that won’t come out). You have no choice but to wash it again. You won’t even be able to press it out with an iron. Depending on the fabric and manufacturer, they will recommend medium to low heat, or more often, hanging these items to dry.
You may have washed your performance wear just like your other whites, brights and colors without issue. The problem comes when the fabric is heated by the body the next time the garment is worn, causing a foul odor. This odor is from the bacteria trapped in the shirt. I learned all about this the hard way with my own personal performance wear, but subsequently had an opportunity to tour a mill for Under Armour and asked a lot of questions.