Speaking of exercies, there's so much stuff against cardio workouts. I go to the gym fairly regularly now and my trainer wants me to begin with a half hour of cardio exercise ie.- 15mins each on 2 machines- treadmill/stepper/rower/bike etc. Have read recently that cardio is a waste of time. my time is limited 'tho I try to work out for approx 2 hours thrice a week, so I'd love to leave out cardio. should I? any 'experts' advice please?