There are a lot of people out there with a knack for fitness, but it’s the real diehards that go after products like P90X. These DVD programs are created to crush you into impeccable shape.

Tony Horton is the brains behind the 90-day program that is sure to help you trim down and tone up. He says that the reason they’ve sold more than 4 million copies of the program is because it appeals to a broad scope of people.

“P90X is a little different than a lot of other programs because…I sell it to grandmothers and then I go to the Philadelphia Eagles facility and they’re using P90X, and there’s folks who have 180 pounds to lose and they’re using P90X,” Horton told StarCam’s Aiden Simko (full interview below).

While the program is a difficult one, he said that there’s a learning curve just like with anything else.

“P90X and everything else I do is about practice makes perfect…There’s a learning curve. There’s an adaptive phase, and the idea here is to show up six days a week,” he said. “Make sure that you eat right because fuel is important, and with that combination of being consistent and eating the right things over the course of 90 days incredible things can happen.”

If you’re one of those extremists who tried your luck and conquered P90X, you might be in for a new challenge. P90X2 will be coming out soon, and if you thought the original was tough, you haven’t seen ANYTHING yet! This new DVD set isn’t just pushups anymore, according to Horton. It’s all about the stability. There’s even a move called “The Impossible,” which is a pushup with your hands on a basketball and your feet on a stability ball. Talk about core strength!

“The three things that we lose as we get older are balance, speed and strength, so the idea here is to combine all those things together and that’s what P90X2 is. There are a lot of gymnastic moves in P90X2 that you don’t see in P90X,” he explained. “P90X helps you get strong. It helps you get fit. It helps you get better. It helps you lose weight, but P90X2 turns those people into athletes.”

Are you up for the challenge?