A sore throat.

After the tri, I caught a cold and have had sore throat for whole one week. Since I started triathlon training, I catch a cold so often, 3 times within 2 and a half months is too much, I think. I wonder why. I train much much less than when I train for a marathon, and I sleep sufficiently these days, so it's hard to say my immune strength is going down because of the triatholon training. Then why? Do I get some infection from the swimming pool water when I swim? Or am I simply getting weaker because of aging? Do I have some another health problem? A bit scary to think about...

Saturday 7.5km jog
Sunday 13.5km aerobic pace
Week total: 43km