We are talking about people who are novices or early intermediates. There's no question that if you are advanced (i.e you are close to your genetic potential), you will lose muscle unless you take juice of course.
I have read on many blogs that whenever you are in a cutting phase, you will lose muslce no matter what your training experience is. Many coaches say otherwise. They say that people who eat enough protein (1gm/lb), are in a moderate caloric deficit (20-25%) and do resistance training 3 - 5 times per week gain muscle even when in a deficit if the trainee is a novice or an early intermediate.
Which one of these claims is true?