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In this week's GCN Show, Si and Dan discuss the dreaded "Grey Zone" and why doing too much riding at this middle intensity might be making you tired without actually making you faster. We also look at a new study linking the world's happiest countries to cycling, and discuss the controversial new documentary narrated by Lance Armstrong. Plus, stay tuned for a massive counterfeit bike bust, a strange new electric vehicle from Honda, and your Hacks and Bodges!