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What are the factors that affect the sprint

wwgvv2010-01-28 21:01:02 +0000 #1
Kazakhstan
eebbww2010-01-28 21:09:07 +0000 #2
forces, broke out, frequency, flexibility, height, technology, coaching factors, etc.! Born on the other hand, the root, the problem looks like the same person is immutable. No matter how much effort is still the same, the constitution is very important

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