Hey not a fight yet here but during some non-contact classes (just bag work and cardio) I tend to bruise very easily sometimes on my right knee and the top of my left foot. Now I try really hard to always hit with my shin when doing round kicks with my left foot but sometimes when the bags swinging I tend to get my distancing wrong and wack the top of my foot. This may happen like two times at most but it seems like this happens too often. My right knee is normally fine but its like the top center of the knee cap gets bruised if I hit it just right on the bag. I'm not sure how I'm hitting the vein in my knee-cap though. I'm mainly wondering is its normal to get bruised up like this. I assume the top of the feet is understandable but the knee cap just seems wierd. I'll throw a dozen knees one class and then another I'll throw 3 and feel it start to bruise up.