Elaine, I learn from the MASTER!
Mic, Thanks for the sweet compliment! My body seems to respond best to endurance, total body strenth workouts and I do them 2-3 days a week...depending on where I am at in my marathon training. If the weeks mileage is light, 3 days a week. If I am scheduled for a 20+ mile run in the morning, I will do 2 days a week and rest the day before instead.
Now, keep in mind, if I am not the shortest person you know, I am a close second! My limbs are very short so any muscle gains show very easily. Couple that with the genetics of putting muscle on easily and I need to be careful of how I strength train. The endurance, total body workouts seem to keep the look leaner. When I do P90X or do a body part per week, I get too bulky and my clothes don't fit anymore.
My point is, body type plays a huge factor. Also, my sport requires a lot of endurance so it only makes sense to train that way.
My favorites are ME, MM, HSC, HSTA, PH. I usually skip the cardio segments and do ab work instead.