Seat Adjustment Made Big Difference

I'm in my first year of tri training and after my first race in mid August, I've been keeping up with my training volume in preparation for next year.  The problem I've been having is my 50 year old overworked knees have been giving me problems.  Soreness had started giving way to some sharp pains under my kneecaps.  Today I decided to try raising my bike seat by about 3/4 inch.  I was very pleased that, while my knees were still sore after a 42 mile ride, they were much better that they had been.