I would imagine so, everybody needs to do cardio at the minimum 3 days a week at mid intensity to help keep the cardio vascular system in shape and keep your blood pressure and lipid profile in check. I would personally do 5 days of cardio at 40 minutes each session and stay within 75% of your max heart rate which should be around 140 bpm on the stair master or Elliptical to help with stamina, oxygen uptake and for overall cardio vascular health. Youll stay leaner and bloat less and can up your calories even more, plus it helps when your going for reps on heavy squats or dead lift, etc.. because you wont get winded and can push more reps before getting all puckered out.