Subject: Why do some people's bruises seldom show any discoloration of the skin?

My question comes from the fact that even when I receive serious blows to 
my muscles (as when playing sports), I never show coloration in my skin as 
is normally associated with a bruise.  I know that some people bruise 
easier than others, but even with serious injuries (with the exception of 
ankle sprains and black eyes) I never show any coloration.  I know I have 
bruised the muscle because I am unable to use it because of its soreness 
to the touch. I know this is probably a simple question, but no one has 
ever given me a satisfactory answer. Thank you.

Re: Why do some people's bruises seldom show any discoloration of the skin?