Dynamic stretching should occur prior to activity after a cardiovascular warm up to specifically warm up joint motion, increase blood flow, improve range of motion, and possibly muscular performance. Static stretching is tool to increase flexibility and should be performed following strength or dynamic activities, ie circus training. Static stretching has been shown to reduce optimal muscular firing for at least 10 minutes afterwards and possibly longer with prolonged (>5 min) stretching. With the high demands of circus arts both in mid and end ranges of motion, I can not recommend static stretching prior to training. Overall, stretching does not appear to be protective against injury as many previously thought.