im equating my logic to cardio....when you run you keep ur heart rate constant over time and therefore see benefits...im guessing your heart doesnt kno if your walking real fast, or jumpin rope or having a long session with ur girl...?!?!

high weight low reps vs low weight high reps..

what is the real difference...how can you scientifically explain that high reps are responsible for certain pumps where low reps are not...isnt a mucle pump a "pump"... i mean if i curl with 30 pound dumbells and do sets of 25 or if i use 60 pound dumbells and do 8 how does my muscle know the difference? how are the pumps different?!

sorry for the ignorance