Ive been lifting wieghts since i was eleven or so, so about ten years in total, I have well developed and strong muscles because of my commitment, i do not want to lose that.

THE PROBLEM IS, despite lifting 5X a Week, i eat like a pig and have always been chubby because of that.

Now im worried that if i eat better and switch to a cardio scedule, i will loose muscle mass, are my fears justified?

and what should i do to minimize loosing muscle and maximiz loosing fat??

focus on a high protein and low carb diet, along with your weight training, as this will ensure you keep your mascle mass. Do cardio a few times a week in conjuction with your weight training, but you do not need to go overboard with cardio, as intense weight traing is great for fat loss, and in the long run more important as an increase in lean muscle will increase your metabolism and burn more calories even when you dont do a thing. Best times to workout are first thing in the morning on an empty stomach as your body is 3 times more likely to use your fat stores as fuel.

good luck.

Take in 1 gram of protein per body pound (lean mass). Then it's all about cals in vs. cals out. Figure out what your maintenance is for keeping your current weight and then lower the said amount by 300 calories. You should lose 1-3 pounds a week. When you stop dropping weight, reduce your cal intake by another 200-300 cals.

You will always lose mass on a cut, but the reduced fat will actually make you look more ripped and swoll. (Through muscle memory, will will regain the muscle lose back pretty quickly as you bulk back up)

If you are lifting 5 x a week and you dont want to loose any muscle then I would suggest 2 grams of protein per lb of body weight!

Try and speed up your workout, so rest a little shorter in between sets.(30 seconds- 1 minute max)

Do cardio after lifting weights, but make sure your total workout is less then 1 hour. Or even 45 minutes.

So 30 minutes weightlifting and then 15 minute run on the treadmill or something.