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2013 action athlete athletic beginning busy challenge china climate clock closeup clothes compete competing competition crowd departure distance effort endurance event exercise exercising extreme face feet fit fitness foot force halfmarathon happy hard health healthy heat high horizontal individual intense international jogging kenya legs line long longdistance man marathoner muscle orange outdoor outdoors people power race racing red road run runner running september shoes shuifu smiling speed spirit sport sports sprint starting strength strong temperature throng timer tired yunnan