Painless hip clicking is usually not something to worry about. Many runners and triathletes experience intermittent painless clicking or popping in their hips and knees.
There are about three causes to the clicking sound in your knee, even if it doesn't hurt. Also included are some exercises to help alleviate the symptoms.
I usually have at least one workout per day, sometimes two or three, but I spend about all in-between time eating. I am not gaining weight, but I am not losing weight either. Should I be concerned?
In addition to writing your race number on each upper arm, they also wrote your age on your calf. This allowed me to see who was passing me by in the bike section of this race.