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Does T'ai Chi Gait Reduce External Knee Adduction Moment?
Wei Liu1, John E Kovaleski2, Thomas M Kepple3
11 Division of Osteopathic Rehabilitation and Biomechaincs, Edward Via College of Osteopathic Medicine , Auburn, AL.
Introduction:
T'ai chi chuan is a beneficial exercise of improving health and function. Biomechanical insights of t'ai chi chuan are less understood.
Objectives:
To study t'ai chi gait (TCG), a common form of t'ai chi chuan in order to quantify external knee adduction moment (EKAM) as a key indicator of mechanical loading of the medial compartment of the knee compared with normal walking (NW).
Design:
A quantitative biomechanics approach to determine peak EKAM for NW and TCG.
Results:
There were a tri-modal pattern of EKAM during TCG and a bimodal pattern of EKAM during normal walking. In addition, subsequent analysis showed a 25%-47% reduction in peak EKAM during double support phases of TCG compared with NW; the peak EKAM of TCG during single-limb support phase showed significantly higher magnitude than the other two double-support phases.
Conclusion:
These results indicate that t'ai chi chuan might be a beneficial intervention for reducing the medial mechanical load at the knee joint, particularly during the first double-support phases of TCG, but the special consideration of higher peak EKAM of single-limb support phase is needed during regular t'ai chi chuan practice.
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