There has always been a constant debate as to which is the best form of exercise, so it's time science finds the answer. Read More: What's the Single Best Exercise? www.nytimes.com/2011/04/17/magazine/mag-17exercise-t.html "Let's consider the butterfly. One of the most taxing movements in sports, the butterfly requires greater energy than bicycling at 14 miles per hour, running a 10-minute mile, playing competitive basketball or carrying furniture upstairs." Run vs. Swim? Statistician Says The Score Is In www.nytimes.com/1993/04/21/health/run-vs-swim-statistician-says-the-score-is-in.html "DR. HOWARD WAINER, a swimmer and statistician at the Educational Testing Service in Princeton, N.J., first began wondering if runners spend energy as efficiently as swimmers when he was an undergraduate in the early 1960's, and used to argue with his runner friends over whose workout was harder." ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily. Watch More DNews on TestTube testtube.com/dnews Subscribe now! www.youtube.com/subscription_center?add_user=dnewschannel DNews on Twitter twitter.com/dnews Trace Dominguez on Twitter twitter.com/tracedominguez Julia Wilde on Twitter twitter.com/julia_sci DNews on Facebook facebook.com/DiscoveryNews DNews on Google+ gplus.to/dnews Discovery News discoverynews.com Download the TestTube App: testu.be/1ndmmMq