You may have seen striped or patterned athletes in the Games. Called Kinesio tape, it promises to relieve muscle pain and strain.
Some swear by it. Some don’t.
I got some sports tape, sort of a tape-on elastic bandage after a shoulder injury, and it did help—for one thing, reminding the user ‘don’t do that’ is a biggie, but not so sure that works with Olympic athletes. It did help the shoulder heal. It was so bad that it would send stars through my vision if I had to stop short or catch my balance and that shoulder kept moving a tad. Now I have full range of motion (I did a lot of pushing that, and yes, it hurt.) And no pain at all. Took most of a year to get the range back.