You prolly shouldnt do high protien/low carb. The body needs carbs to help synthesize protiens so your muscles dont look flat and youll be too lazy to do a complete workout. Do a medium carb (wheat breads= more complex carb) and dont cut out fats completely. Keep a few natural fats (peanuts, flax seed oil) for good meausure. To achieve a good cardiovascular workout, you have to do the exercise for at least 20 min. (run, brisk walk *pff, rowing, cycling)

This came from US Army FM 21-22 chap. 2,3,6