How are the concentrations of LDL and HDL associated with the risk of heart disease?

I other words how are levels of hdl and ldl likded to heart disease?

HDL is the good, LDL is the bad. Try web.md theres plenty of info there.
HDL is raise by exercise, omega oil.
LDL is from saturated animal fat.
You also need to know your triglycerides, these are fats that come from carbohydrates.