Perhaps the chanting should be changed to HUM or ALM for the Muslim people.
There is a lot of controversy emanating from the Muslims in India for following Yoga traditions. The Govt of India has even suggested that they chant the word "Allah".
AUM is not just a symbol for the Supreme Soul or Brahman which pervades every nook and corner of Space and Time, but also a summation sound signature of the Human Sound Apparatus.
The "A" sound comes from the lower stomach till the base of throat. The "U" sound comes from the mouth base to the lips. The "M" sound comes from the nasal mouth base to the nasal top base.
Exercising these apparatus stimulates vibrations of the body and the mind into one harmony.
The same principle of Kapalbhati when done for long duration and intensively in rapid successions leads to each cell vibrating in energy!