You can be 10 % body fat and look ripped or you could be 10 % body fat and be very skinny with very little muscle mass & very little ab definition. (nowloss.com)
Even the men on the lower - protein diet lost little muscle mass, he pointed out, which was unexpected and almost certainly due, he and his colleagues concluded, to exercise. (well.blogs.nytimes.com)
These absolute rules don't make sense — are you are sedentary person with little muscle mass? (freedieting.com)