I bought this product for knee pain and I Stappe to relieve my patellar tendon. The relief is immediate. My advice is to really clean the area where you paste the strap for better grip. Place the strap 10 or 15 minutes before play sports also allows al glue stick better. I developed a little more about it on my test 3NS TEX here [...] This is an excellent product for my taste (and cheap !!!)