I posted this on the diet board but notice that you gals seem to have more answers. I'm currently on a Keto diet and want to start doing some cardio (which I have not been doing). Being in Ketosis should I do a full hour of cardio or will I burn to much muscle. Also, what should my target heart rate be. I'm 30yr. old and weigh 185 lbs. At the end of January I weighed 212 lbs. I don't know what my %bf is but I can still pinch about an inch of fat on my gut. I am thinking that these next 10 lbs. will fall off even quicker with the addition of exercise. I think I've read too much on the subject and got myself confused. Someone please help.