Well, don't use any weight at first, of course - I started with just my body for two sets of 4. I did three sets of 6 with 115 pounds tonight. Took me about 2 years to work up to that.

They're GREAT for your body, though! Builds bone density all down your spine and through your hips and legs, boosts metabolic rate, builds flexibility, and also builds up core strength. Really, the king of all exercises.