It mostly occurs whenever I bike, in my left leg as I pedal down. Every down stroke is a click/pop. There is not much pain just minor discomfort and I do not wish it to progress into something worse. I asked other riders about this and they said they have experienced it as well. I can feel it sometimes when I walk but I have no clue it is there when I run or swim. Any ideas or experience with something like this? Strength training or stretching? Saddle/cleat/crank? Thanks!