January 31, 2013 12:00 PM
1. The Hold
Everyone knows the laces should point away from the kicker's foot, but pros like Henery demand that the ball be standing straight up too. Tilting it lowers the center of mass, making it tougher to strike the sweet spot, says biomechanics professor Jeff Hawks, who studied Henery's technique with colleague Chase Pfeifer at the University of Nebraska, Lincoln.
2. The Plant
During his approach, Henery places his left foot, heel first, next to the ball?barely 10 inches from the nose. By positioning himself this close and pointing his planted big toe directly at the goalpost, the kicker opens his hips and draws power from the core muscles in his torso and legs.
3. The Arm
The 177-pound pro extends his left arm at a 90-degree angle, keeping his body in balance as his chest and hips face the target. While leg speed is crucial for distance, posture and balance dictate accuracy, says Sacramento State professor of kinesiology David Mandeville.
4. The Kick
Any misplaced movement reduces velocity and energy. Henery strikes the sweet spot with the top of his foot ("right where you tie your shoes," he says) and powers straight on through it. When he makes contact with the ball, his foot is traveling 53 to 60 mph. By accelerating through the ball, he squeezes every bit of power from his upright kicking motion. The sweeping follow-through lets his foot reach peak speed in the 0.03 seconds after contact.
5. The Flight of the Ball
As a sophomore at the University of Nebraska, Henery once kicked a 57-yard field goal. He made it look easy?and that's the whole point. When kickers break form, they get into trouble. With a perfect strike and no wasted energy, Henery can launch the ball at a velocity of 53 mph and 1400 rpm. The faster the rotation, the less drag the ball will encounter. If he tried to put more leg into the kick, odds are good he'd send the ball off on the wrong trajectory. According to Rodney Imamura, who researched kicks alongside David Mandeville and Michael Nave at Sacramento State, field goal attempts generally soar at an angle between 27 and 42 degrees. Henery's kicks are more precise, leaving his foot in the safe range between 31 and 41 degrees.
Source: http://www.popularmechanics.com/outdoors/sports/football/anatomy-of-a-field-goal-15044000?src=rss
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