It depends on a few factors such as your diet, your total training time in the gym, and how much cardio you are doing. If you are trying to maintain muscle and drop bodyfat, slightly increase your protein intake and limit your cardio to about 20-30 minutes a day on days that you strength train. Going longer than 30 minutes, you increase your risk of burning off hard earned muscle. Try doing H.I.I.T (High Intensity Interval Training) for your cardio.
“Opposition is a natural part of life. Just as we develop our physical muscles through overcoming opposition - such as lifting weights - we develop our character muscles by overcoming challenges and adversity.
It does depend on your diet and how much cardio you are doing. Without knowing either, let me give you this suggestion. Do high intensity interval training (HIIT). This will help you lose the fat and keep the muscle.
Picture a marathon runner and a 400M Olympic sprinter. The marathon runner does lots of long cardio while the sprinter does HIIT( or sprints and then rests and then continues this for a short time).
Honestly, these guys covered it. It's a complex mathematical equation involving calories consumed and burned, as well as the quality and type of calories coming in and exercise type, time, intensity level and frequency, which will vary from person to person given their existing weight, resting metabolic rate and current activitiy level. Your question is pretty general, knowing more about you I could give you any more specifc recos.
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