Yes, it will have heat for a long time. Mine used to get hot and sometimes red if it did too much. Now it still gets quite warm when I've been active. Be sure and ice. The heat is completely normal. I knew I still had heat with just a scope performed and had heat for 6 months so I'm sure this heat will last a year or more. My mom just celebrated her 1 yr TKR and after exercise, she had a little warmth. (We were comparing our heat the other day, she at 1 yr, me at 6 mos, lol)