THERE IS WALKING AND THEN THERE IS TAI CHI WALKING WHERE THE USE OF ABDOMINAL AND BACK MUSCLES IS PRIMARY. BOTH ARE EXPLAINED BELOW:
"EXTERNAL" OR EVERYDAY WALKING AND THE OBVIOUS QUESTION:
Are the abdominal muscles active during normal walking?
"It may be surprising, but electromyographic (EMG) analysis of the abdominal muscles has demonstrated that the abdominal muscles are quite inactive during walking on a flat surface" (Sheffield & Major, 1962
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"EMG analysis is the scientific method of measuring the muscle’s electrical activity and contractility during movement, very similar to the way an electrocardiogram (ECG) measures heart rhythm. The rectus abdominis and external oblique muscles exhibit little electrical activity in an erect posture unless the trunk is inclined backward or laterally and/or resistance is applied to the torso (Walters & Partridge, 1957). The internal obliques, on the other hand, are in a state of tension while sitting, standing, and walking, to help stabilize the pelvis" (Floyd & Silver, 1950; Walters & Partridge, 1957).
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