Can Pickles And Bananas Really Help Athletes?

Some athletes swear by pickle juice and bananas, but how do they help? Quick Questions explains!
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Sources:
http://www.ncbi.nlm.nih.gov/pubmed/19997012
http://well.blogs.nytimes.com/2010/06/09/phys-ed-can-pickle-juice-stop-muscle-cramps/
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0037479
http://www.huffingtonpost.co.uk/2012/05/30/diet-bananas-boost-sports-perfermance_n_1555441.html
http://www.smithsonianmag.com/science-nature/a-spoonful-of-pickle-juicehelps-muscle-cramps-go-down-30137937/?no-ist
http://www.boston.com/lifestyle/food/articles/2009/06/22/athletes_resort_to_pickle_juice_and_other_odd_foods_to_boost_performance/?page=2
http://www.medicaldaily.com/bananas-are-just-good-sports-drinks-240631
http://www.livestrong.com/article/493009-what-role-does-potassium-play-in-muscle-contraction/