A "kettlebell" is a traditional Russian cast iron weight that looks like a cannonball with a handle. The Russian Special Forces personnel owe much of their wiry strength, lethal agility, and never-quitting stamina to kettlebells. 'Soldier, Be Strong!', the official Soviet armed forces strength training manual pronounced kettlebell drills to be "one of the most effective means of strength development" representing "a new era in the development of human strength-potential".

Because they deliver extreme all-around fitness; the total package of strength, conditioning, flexibility, resilience, and wiry muscularity. Kettlebells forge physiques along the lines of antique statues: broad shoulders with just a hint of pecs, back muscles standing out in bold relief, wiry arms, rugged forearms, a cut-up midsection, and strong legs.