Other obstruction-dunks are worth noting: Haneef Munir performed a Dubble-Up, dunking with his right-hand and then caught and dunked a second ball with his left hand—a yet to be duplicated dunk pioneered by Jordan Kilganon on a lower, non-regulation rim. Jordan Kilganon, a Canadian athlete, approached from the baseline a person standing, holding the ball above their head. Kilganon leaped, controlled the ball in front of his torso and raised it above the horizontal plane of the rim before bringing the ball downward into the hoop and hooking both elbows on and hanging from the rim.
For one-footed jumpers, the ball is generally transferred to the non-dominant hand just before or upon take-off; for two-footers, this transfer is often delayed for milliseconds as both hands control the ball to prevent dropping it. Once airborne, the dunker generally transfers the ball from non-dominant to dominant hand beneath a raised leg. Finally, the ball is brought upwards by the dominant hand and slammed through the rim.
An important component of maximizing height in a vertical jump is attributed to the use of counter-movements of the legs and arm swings prior to take off, as both of these actions have been shown to significantly increase the body’s center of mass rise. The counter-movement of the legs, a quick bend of the knees which lowers the center of mass prior to springing upwards, has been shown to improve jump height by 12% compared to jumping without the counter-movement. This is attributed to the stretch shortening cycle of the leg muscles enabling the muscles to create more contractile energy. Furthermore, jump height can be increased another 10% by executing arm swings during the take off phase of the jump compared to if no arm swings are utilized. This involves lowering the arms distally and posteriorly during the leg counter-movements, and powerfully thrusting the arms up and over the head as the leg extension phase begins. As the arms complete the swinging movement they pull up on the lower body causing the lower musculature to contract more rapidly, hence aiding in greater jump height.[5] Despite these increases due to technical adjustments, it appears as if optimizing both the force producing and elastic properties of the musculotendinous system in the lower limbs is largely determined by genetics and partially mutable through resistance exercise training.[6][7]

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In the 1950s, Jim Pollard[28] and Wilt Chamberlain[29] had both dunked from the free throw line—15 feet from the basket. Chamberlain was able to dunk from the free-throw line without a running start, beginning his forward movement from within the top half of the free-throw circle.[29] This was the catalyst for the 1956 NCAA rule change which requires that a shooter maintain both feet behind the line during a free-throw attempt.[30]
This phase begins with the athlete at the bottom of the jump, just as he begins exploding upwards towards the takeoff. The force-time graph shows that the athlete reaches peak forces shortly after reaching the lowest point of the jump. He then further accelerates until his feet leave the ground and there are no more ground reaction forces measurable.
Still, by the late 1950s and early 1960s players such as Bill Russell and Wilt Chamberlain had incorporated the move into their offensive arsenal. The dunk became a fan-favorite, as offensive players began to aggressively intimidate defenders with the threat of vicious slams. Through the 1970s, the slam dunk was standard fare; David Thompson, Julius Erving, Darryl Dawkins, and others wowed crowds with high-flying moves.
Finally, to make things even more complicated, it is likely that the roles of the lower body muscles may differ according to if: (1) the jump is maximal or sub-maximal, (2) long-term training has occurred, and (3) the individual has a “hip-dominant” or a “knee-dominant” technique. Indeed, the vertical jump is more dependent upon the hip extensors in maximal jumps, compared to in sub-maximal ones. And after long-term jumping training, the increase in the amount of work done in the jump by the hip extensors is related to the increase in height, while the increase in the amount of work done by the knee extensors is not.

By emphasizing certain muscles in your legs, you can train your body for the force needed to leap high. Increasing your vertical jump will improve your rebounding, blocking, dunking, and make you an all-around better basketball player. Here are a few of CoachUp’s favorite exercises for improving your leg strength and vertical jump. If you ever need extra motivation to get through these exercises on a daily basis, just re-watch these gifs and focus up!

Klein respondió en su página web a Norberg afirmando que había tergiversado su enfoque. Klein sostiene que Norberg usa argumentos sin base, al afirmar que su libro es sobre un hombre, Friedman, mientras que en realidad trata sobre una "tendencia multifacética ideológica".21​ Norberg respondió que "se defiende solamente de una de las críticas que le hice. Da la impresión de que acabó por intentar encontrar pequeños errores aquí y allá en su libro."22​
An impressive vertical jump is the ultimate standard of lower-body power and explosiveness—an attribute that pays as many dividends in high-impact sports like basketball, football, and soccer as it gets you wide-eyed looks in the gym. Increase your hops, and chances are you’ll also be able to run faster, lift more weight, and maybe even throw down a dunk at your next pickup basketball game.

This list of movements was compiled by a pair of trainers who know a thing or two about making athletes more explosive: Jason Benguche, assistant strength and conditioning coach for the Carolina Panthers (@movement_mogul on Instagram), works one-one-one during the season with the NFL’s most explosive quarterback, Cam Newton. And Firdose Khan (@dose_9), head trainer at Nine Innovations athlete training facility in Houston, has worked with such athletes as former NBA MVP Derrick Rose and NFLers Arian Foster, Braxton Miller, and Brian Cushing.

Original shocks have a secocnd lower nut that prevents the shock rod from spinning when loosening or tightening the upper mounting nut. The Bilstein shocks are not equipped with the second nut and the shock rod turns while trying to tighten the upper mounting lock nut, making it impossible to tighten. I had to return the shocks and bought a different brand. Also, Bilstein's installation instructions are about the worst I have ever seen.
The following data were recorded every 6 hours for 48 hours, every 8 hours on days 3, 4, and 5, and once a day on days 6, 7, 14, 21, and 28: vital signs, hemodynamic variables (including systolic and diastolic arterial pressures, heart rate, central venous pressure, and, when possible, pulmonary-artery pressures), cardiac output, arterial and mixed-venous (or central venous) blood gas levels, doses of vasoactive agents, and respiratory conditions. Biologic variables, data on daily fluid balance, microbiologic data, and antibiotic therapy were recorded daily for the first 7 days and then on days 14, 21, and 28.

Since the magnitude of the effect derived from observational studies can be misleading, we opted for a sequential trial design with two-sided alternatives20; the trial design called for analyses to be performed after inclusion of the first 50 and 100 patients, and then after inclusion of each additional 100 patients, and allowed for the discontinuation of the trial according to the following predefined boundaries: superiority of norepinephrine over dopamine, superiority of dopamine over norepinephrine, or no difference between the two. An independent statistician who is also a physician monitored the efficacy analyses and the adverse events; on October 6, 2007, after analysis of the outcome in the first 1600 patients showed that one of the three predefined boundaries had been crossed, the statistician advised that the trial be stopped.
In the past, it has been possible for players to dunk a basketball and pull the rim down so hard that the glass backboard shatters, either around the rim itself or, at times, shattering the entire backboard, or the entire goal standard fails. Reinforced backboards and breakaway rims have minimized this at the college and professional levels, but it still happens at lower levels.

Stand on your right leg and lift your left knee up as high as you can. Keeping your knee bent and your left leg out of the way, jump and land eight to ten times on your right leg. Focus on the landing. Your body should be ready to spring back up again the second you hit the ground. Try to jump higher with every repetition. Use your left hip and raised leg to build leverage.
There are over 300 fitness tests, so it's not easy to choose the best one. You should consider the validity, reliability, costs and ease of use of each test. Use our guide to conducting, recording, and interpreting fitness tests. Any questions, please ask or search for your answer. To keep up with the latest in sport science and this website, subscribe to our newsletter. We are also on facebook and twitter.
Scaling the back squat for beginner-level athletes generally entails sticking to lighter loads (even bodyweight only to start) while learning proper technique. Goblet squats with a kettlebell or dumbbell can be used to practice form, but keep in mind that goblets are an anterior (front-loaded) variation and won’t directly mimic the mechanics of the back squat.
Toe Raises – stand with your feet shoulder width apart, typically on stairs or any sort of ground you can stand on that allows your heel to dip down. Then raise up on the tips of your toes. Continue this process until your complete your reps. Don’t rock up and down – or go to fast. For the exercise to work, you have to use correct form and go at a steady pace.

A second, more efficient and correct method is to use an infrared laser placed at ground level. When an athlete jumps and breaks the plane of the laser with his/her hand, the height at which this occurs is measured. Devices based on United States Patent 5031903, "A vertical jump testing device comprising a plurality of vertically arranged measuring elements each pivotally mounted..." are also common. These devices are used at the highest levels of collegiate and professional performance testing. They are composed of several (roughly 70) 14-inch prongs placed 0.5 inches apart vertically. An athlete will then leap vertically (no running start or step) and make contact with the retractable prongs to mark their leaping ability. This device is used each year at the NFL scouting combine.