I am a huge fan and user of kettle bells. You can simply do a lot of different exercises with them and they help you improve that core physical fitness that is essential in the Martial Sciences.
Sonny Puzikas of Systema is coming out with a new DVD soon titled: The Forge: Hidden Dimension of Core Conditioning
Here is a promo clip:
Here is his website: Gospel Of Violence
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Brian R. VanCise
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