Muscle tension is a simple and powerful biofeedback parameter: simple because
it's easy to sense, or to relate your subjective experience to the feedback, as
well as easy to influence. Powerful because it's subject to non-volitional
mental and emotional influences that you can easily not be aware of.
Most people will be familiar with the experience of stress manifesting as
tightness in the body. Even passing thoughts can provoke tightening. In other
words, muscle tension biofeedback demonstrates the reality of the mind-body
connection.
Measuring Muscle Tension
Muscle tension is measured via an electrical correlate known as electromyography
or EMG. It's easy to monitor EMG with simple sensors in contact with the skin.
Which muscles are measured depends on where you place the sensors. The two most
common placements are:
- Forehead - picks up tension from the whole head. This picks up
facial expressions of emotion, and inner dialogue manifesting as subliminal
activity in speech muscles. Even how you pay attention can influence this
measure.
- Wrists - picks up tension in the shoulders, arms and hands.
It's useful for distinguishing chest-based breathing from more relaxed abdominal
breathing.
Renting Biofeedback Equipment
You can rent a device capable of measuring muscle tension, plus other biofeedback
parameters, enabling you to practise at home.
© Copyright Glyn Blackett York Mind-Body Health, The Biocentre, York Science Park, York YO10 5NY 01904 435 267