Cardiac Output is measured by the Heart Rate (Time and Velocity) and Stroke Volume (Space and Fullness).
The Heart follows its rhythms, normalizing at an average of 60 to 80 beats per minute, which in our fetal and infancy stages, were doubled (120 to 140 bpm).
The heart rate beats to its own clock, called the sinus rhythm, created by a node of pacemaking cells that ensure blood flow channels air, nutrients, chemicals and wastes travelling throughout the body.
In toxic and inhibited environments, cardiac output is hampered by illness, anxiety or mental disturbances, which can be healed in spaces where the heart is able to come back to life.
Music bears an influence to the heart's sinus rhythm, through the effects it brings to the sympathetic and parasympathetic nervous systems, through the vagus nerve and the sympathetic trunk. Music, proprioception and emotions increase and decrease the heart rate, bringing about alterations in states of consciousness.
For the innerdance facilitator, heart rate and stroke volume can be influenced using the two music tools, bpm and manual loops.
The Heart Rate's tempo are synchronized by hormones, ions and most especially the neurotransmitters sent out by the Sympathetic and Parasympathetic Nervous Systems. Epinephrine, norepinephrine and acetylcholine have the power to accelerate and decrease the heartbeat's tempo which establishes mood, thought process, feelings, body movements.
Tempo and repetitions can be adjusted depending on specific durations during the multiple stages in the innerdance playlist, facilitators experientially developing a sense of when fast or slow takes place during a one to two-hour session.
Who is the Music?
On the following video, the first one I ever created that documented the innerdance in its first phases, the answer the the query is the Earth. The Music is the Earth.