About Unknown Tony is the host of the Paleo Magazine Radio podcast, author of "Paleo Grilling: A Modern Caveman's Guide to Cooking with Fire", and Cofounder of Powerful PT, an innovative information resource for Fitness Professionals. He has appeared on numerous local and national television and radio broadcasts and regularly hosts healthy cooking workshops and informational lectures. He is also a full-time Personal Trainer and Wellness Consultant who lives in Jacksonville Florida with his wife Jamie.

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In " The 4-Hour Body ", notorious "hacker" Tim Ferris suggested that if you only do one exercise, it should be the kettlebell swing. Given that this single movement simultaneously engages the "core" musculature of the hips, spine, and shoulder girdle as well as the periphery (arms and legs) in a dynamic and functional way (controlling the acceleration and deceleration of an object while on your feet and balanced in the field of gravity) it's possible that he may be right.Like any complex movement, proper swing technique can take months or even years to develop, and it can be helpful to work with an experienced coach or trainer during this process. Incorrect execution of the kettlebell swing may place too much strain on the lower back and may exacerbate existing injuries. A great resource for those who are interested in learning the ins and outs of kettlebells is Pavel Tsatsouline's DragonDoor.com where you can buy books, videos, equipment, and even find certification courses and workshops.However, I'm going to assume that you already have familiarity with kettlebell swings (as well as a baseline level of fitness) and am thus issuing you a challenge.To enter, video tape your submission and link to it in the comments section of this post or post it as a video reply to the Official CKC YouTube video (below).Selected submissions will be featured on the FED Facebook page