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Pre-exercise stretching has been widely reported to reduce performance in tasks requiring maximal or near-maximal force or torque. The purpose of this study was to compare the effects of 3 different pre-exercise stretching routines on running economy. Seven competitive male middle and long-distance runners (mean+/-SD) age: 32.5+/-7.7 years; height: 175.0+/-8.8 cm; mass: 67.8+/-8.6 kg;[Latin small letter v with dot above] O2max: 66.8+/-7.0 ml [middle dot] kg-1 [middle dot] min-1) volunteered to participate in this study. Each participant completed 4 different pre-exercise conditions:(a) a control condition,(b) static stretching,(c) progressive static stretching, and (d) dynamic stretching. Each stretching routine consisted of 2-30-second stretches for each of 5 exercises. Dependent variables measured were sit and reach test before and after each pre-exercise routine, running economy (ml [middle dot] kg-1 [middle dot …