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"The feel of a correct extension is the same feel you get watching a motorboat smoothly pick up speed. The stern sinks and the bow rises and everything smooths out as the speed increases."
"Develop more lengthening and increase the number of strides gradually."
"If a horse will go fast by extending his stride rather than taking quicker, shorter steps, he will cover ground quicker with fewer strides per mile. This lessens the stress on feet and legs as well as on his muscles."