Hello everybody! I am somewhat new to Ti Chi and it seems that if I do alot of training, my knees swell up considerably. I think it may have to do with the speed of my training and the fact that I am doing it on carpet rather than a smooth surface. I generally practices between 1-5 hours a day, and eating a balanced diet has been an ongoing issue, so that might be part of it. Perhaps, It has something to do with how my legs and feet are moving? If anyone knows any way to prevent this from happening, or any excersizes to keep my knees from complaining so much, do share. Thank you and have a great day!