Keep your cardio workouts to about three 30-minute sessions a week to preserve muscle mass, recommends Health Services at Columbia University.
“More isn’t always better when it comes to cardio. An ideal jog or other cardio workout should have your heart rate within 65 to 85 percent of its maximum. You may end up canceling out your hard-earned strength training and burn off muscle mass if you stay at this intensity for over 45 minutes,” according to Livestrong.com
These are some exercises to avoid: Full Squats, leg extensions, lat pull down and shoulder press behind the neck.
For more information click here: Livestrong.com