Have you guys seen these things before? As popular across the internet as they are rare in gyms, kettlebells are the province of Russians, fitness fanatics and the truly hardcore. Looking like cannonballs with handles affixed, they seem to be a curious version of dumbbells, primitive tools belonging to strongmen from centuries past. So what about these weird looking workout tools is so effective, so hardcore, so amazing? Why do people practically claim they can cure cancer, help us get back to the moon and make the most beautiful person you ever met fall irrevocably in love with you again? Read on, brave and gentle reader, and learn of the extreme nature of kettlebells, and why you should consider adding them to your workout?