Gold's Gym

Today I tried Gold's Gym - not the dance one, the cardio one.  I boxed for about 45 - 50 minutes.  The last time I tried this game was in 2010 (that's what it said - I didn't know it had been that long ago).  Anyway, when I did it before it made my knees hurt so I couldn't continue using it.  Otherwise I really like it.  I'll have to see tomorrow if I have the same problem with my knees.