im a ectomorph.. i could not get fat or gain excess weight if i tried,, and believe me ive tried..lol i burn anywhere form 1000 to 1600 calories daily just by doing normal activities ,, im hyperactive and my brain never turns off lmao.. if i miss a meal i start to loose weight..lol i pound out about 4000 to 4500 calories daily just to see steady gains.. cardio would release to much cortisol in my blood stream and kill my gains.. lol