By Bianca Posterli
If you want a great butt, go to David Kirsch. After all, he’s sculpted the rear ends of supermodels like Heidi Klum and Karolina Kurkova. 
By now most have tried at least one of his many books and DVDs, but the fitness master just created a brand-new must-have book all about the butt, called David Kirsch’s Butt Book, because “everyone wants to have the perfect butt!”
“Karolina Kurkova inspired it,” he admits. “She said, ‘David Kirsch is a master of the ass,’ and I said, ‘You know what? I like that,’ and I think I am!” From there the book was born. “My specialty is sculpting and toning anyone. It can be any shape: apple, pear, big, small, flat, too round, a little like J.Lo—too much.”
His new book is the first of four dedicated to specific areas of the body, according to David, so you can look forward to perfecting each and every part—the Kirsch way. And unlike his other books, this was self-published, giving him a little more room for creativity. “Because I have the freedom, because I’m the publisher, it’s much more fun and lighter. It’s animated, very beautiful and cartoony. I want to gear it toward girls 15 to 65, whoever wants to have a perky butt.”
One must-learn takeaway from David’s new book for the best butt? The sumo-lunge move. “It’s the exercise I created for Heidi almost 10 years ago,” says David. “It’s never ever failed me. I had just started working with her and I asked her if she would help me do my first DVD, my boot camp, Sound Mind Sound Body. We were freezing our butts off; it was late October on the beach in South Hampton. It was a move just to keep us warm, but it totally worked and I incorporated it into my daily routine with a lot of my girls.” It is a move you can do in just 5 minutes a day and one that will get you fast results. So get sumo lunging!
Sumo Lunge with Side Kick and Frog Jump
1. Stand in a sumo position with your feet lightly wider than shoulder’s-width apart, your knees bent, body weight over your heels with your arms up directly in front of your chest.
2. Swing your right leg up and out to the side, bringing your right knee in toward your chest and then over to the right in one continuous motion, landing in a squat. Make sure to keep your knees just above—not in front of—your toes. Hold for a few seconds.
3. Stand up from your squat and kick your right leg out to the side like you’re kicking an imaginary opponent, coming back down into the sumo position.
4. Spring up with a frog jump, thrusting your arms overhead. Land on your heels, rolling forward onto your toes. Repeat with your left leg.
5. Continue alternating right and left until you have completed a set of 10 lunges on each side.
Watch Julie Henderson’s private training session with David here.
