What causes those butterflies in your stomach? DAILY EPISODES, answering your burning questions. Watch 5 episodes before anybody else: http://bit.ly/1n5llRo Use the hashtag #ScienceSays to share your burning Olympic questions! Special thanks to the CBC for supporting this series. SUBSCRIBE! http://bit.ly/10kWnZ7 FOLLOW US: Instagram and Twitter: @whalewatchmeplz and @mitchellmoffit Clickable: http://bit.ly/16F1jeC and http://bit.ly/15J7ube Facebook: http://on.fb.me/1fjWszw Twitter: http://bit.ly/1d84R71 Tumblr: http://bit.ly/1amIPjF Vine: Search "AsapSCIENCE" on vine! Written and created by Mitchell Moffit (twitter @mitchellmoffit) and Gregory Brown (twitter @whalewatchmeplz). Supine and standing sympathovagal balance in athletes and controls. http://www.ncbi.nlm.nih.gov/pubmed/8223523 Pre-competition imagery, self-efficacy and performance http://www.tandfonline.com/doi/abs/10.1080/026404102320219400?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%3dpubmed#.UwJpGRCwJcR Playing with confidence: the relationship between imagery use and self-confidence and self-efficacy in youth soccer players. http://www.ncbi.nlm.nih.gov/pubmed/18949659