Single leg jumping with it's high impact forces and dependence on the elasticity of muscles and tendons works best for young athletes. With increasing age, the tendons and muscles lose their elasticity and springiness and the risk of injury gets higher and higher. That's why a lot of basketball players start to rely more and more on their two-foot jump as they get older. And the winner of the Olympic high jumping contest are almost always below 30.

Secondly, in addition to the rate of force development, the size of the force itself produces a negative feedback effect on vertical impulse, because higher forces lead to faster accelerations, which in turn reduce the time spent producing force before take-off. This is *partly* why drop jumps tend to involve higher forces, shorter ground contact times, and yet similar jump heights to countermovement jumps.

A vital part of basketball training is improving your vertical leap. As an athlete, you should be incorporating exercises into your basketball drills and fitness training that focus on increasing muscle strength and leg speed. Simply put, you won’t turn into Vince Carter or Andre Iguodala overnight, but learning how to work the appropriate muscles on a daily basis will go a far way towards improving your overall vertical.

Start with a ping-pong ball, then a tennis ball, then a softball, then a volleyball, then a youth-sized basketball, and on up until you can dunk with a regulation size ball. If you can't palm the ball, then you will need to learn how to control the ball with two hands until the last minute extension for the dunk with one hand, or you will have to jump high enough to dunk two-handed.
Barry, who retired from the NBA in 2009, recalled that a few days before our sit-down he “drove out to the Clippers’ practice facility, wearing sneakers and board shorts, just to get my basketball fix in. Between games I pick up a ball and start shooting. In the back of my mind I’m thinking, You’re 42, man; can you still? So I get a rebound, do a little power dribble in the paint and, sure enough, throw it down. I put the ball down and walked out. I can still do that. That’s good.”
i am 6 foot 2 inches tall, i am in the 8th grade, and i am 13 years old going on 14 in september. I discovered on May 15th that I could hang on the rim at my school with two hands by jogging about 3 steps very very slowly and jumping off both of my feet. I have dunked about 3 times before, but the last couple times I tried, I got "hung" and sent backwards but I managed to keep balance on the way down due to my height. What is my problem? Also after I attempt to dunk about 4 times in a day my shin begins to hurt. Why does this keep happening?
Perform jump and reach exercises for a simple vertical jump workout. Start in a standing position with your arms above your head, your feet shoulder-width apart, and your knees and hips forward. Bring your arms down and back, while simultaneously lowering your hips and bending your knees. Then, swing your arms forward and jump as high as you can.[5]
In the tradition of New Year’s resolutions and the like, you can give yourself a year. I certainly didn’t want to give myself more than a year, because after a year I knew I would grow tired of it, and my body would start to get quite unhappy with me. But I would recommend to someone that they give it a go for at least six months. It’s also a way of just getting yourself in fantastic shape. I mean, trying to dunk a basketball in itself is awesome. It’s really great to be able to dunk a basketball, to get yourself higher up than you thought possible. But the process of getting yourself in that kind of position is itself rewarding.
Dunking (or attempting to dunk) is a high-impact, highly intense activity that deserves a sufficient warm-up prior to a throw-down session. Just as you would for a lifting workout, start your warmup with a few minutes of low-intensity cardio, then progress to more dynamic movements—dynamic stretching/mobility drills as well as jumping. Before attempting your first dunk, take a couple dry runs with no ball where you’re touching or grabbing the rim at the top.
I'm 5"11 and 12 years old, and i'm able to touch the rim, but it's very inconsistent. like 50% of the time I can wrap my 3 biggest fingers around it, or i dont touch it the other 50% of the time. I've been training for about 4 months, doing calf raises every day until they cramp, and everyday i try to touch the rim at my gym or school or at any court. I found out i could touch the rim 2 days ago, but is there any way to add 7 inches to my vertical instead of doing thousands of calf raises again, because i really want to be able to dunk by 8th gradr
Go between the legs. While he wasn't the first player to complete it, Vince Carter wowed crowds at the 2000 NBA dunk contest by passing the ball under one leg while in the air and slamming it with authority. It didn't hurt that his forehead was almost touching the rim. If you've worked your ups to that height, try passing it under one leg and dunking it.
My early efforts were clumsy. Jumping willy-nilly as high as I could, with no regard for technique, I occasionally felt my finger graze the underside of the rim. Most times I did not. What I did feel early on was a firm self-awareness­ that I was a two-foot jumper (like Spud Webb, Dominique Wilkins, Vince Carter and myriad NBA Slam Dunk champions with whom I have nothing else in common athletically) as opposed to a one-foot jumper (see: Julius Erving, Clyde Drexler, Michael Jordan). This meant that my best shot at dunking would be to elevate like an outside hitter in volleyball—that is, by stepping forward with one foot, quickly planting my trailing foot next to it and then propelling myself upward off both.
This book is just a glimpse of some of the great workouts, and outcomes of the workouts he has to offer. Right now I am in the middle of his Twice The Speed workout AND Vertical Jump Cure (found in the back of the book), and it is defiantly something you need to checkout if you like what this book offers. But not only does he have vertical jump workouts or speed workouts but he has nutrition guides, flexibility cure, and many other bonuses.
variations: The vertical jump test can also be performed using a specialized apparatus called the Vertec. The procedure when using the Vertec is very similar to as described above. Jump height can also be measured using a jump mat which measures the displacement of the hips. To be accurate, you must ensure the feet land back on the mat with legs nearly fully extended. Vertical jump height can also be measured using a timing mat. The vertical jump test is usually performed with a counter movement, where there is bending of the knees immediately prior to the jump. The test can also be performed as a squat jump, starting from the position of knees being bent. Other test variations are to perform the test with no arm movement (one hand on hip, the other raised above the head) to isolate the leg muscles and reduce the effect of variations in coordination of the arm movements. The test can also be performed off one leg, with a step into the jump, or with a run-up off two feet or one foot, depending on the relevance to the sport involved. For more details see vertical jump technique.

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.
Rope skipping is also a very basic form of a type of exercise called plyometrics. Plyometric exercises involve repetitive explosive movements, such as jumping up and down or catching and throwing a medicine ball. The idea is to execute the movement with as little downtime as possible between repetitions. This, in effect, trains muscles to be powerful and explosive, and utilize the kinetic energy inherent in athletic movements in the most efficient way.

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]
4. verb By extension, to achieve a forceful, dramatic success or accomplishment handily or easily, often at the expense of someone or something else. Sometimes hyphenated. The incumbent president has slam dunked his opponent in every televised debate so far. If we can slam-dunk this proposal, we'll get enough funding to see us through to the end of next year.

Circulatory shock is a life-threatening condition that is associated with high mortality.1,2 The administration of fluids, which is the first-line therapeutic strategy, is often insufficient to stabilize the patient's condition, and adrenergic agents are frequently required to correct hypotension. Among these agents, dopamine and norepinephrine are used most frequently.3 Both of these agents influence alpha-adrenergic and beta-adrenergic receptors, but to different degrees. Alpha-adrenergic effects increase vascular tone but may decrease cardiac output and regional blood flow, especially in cutaneous, splanchnic, and renal beds. Beta-adrenergic effects help to maintain blood flow through inotropic and chronotropic effects and to increase splanchnic perfusion. This beta-adrenergic stimulation can have unwanted consequences as well, including increased cellular metabolism and immunosuppressive effects. Dopamine also stimulates dopaminergic receptors, resulting in a proportionately greater increase in splanchnic and renal perfusion, and it may facilitate resolution of lung edema.4 However, dopaminergic stimulation can have harmful immunologic effects by altering hypothalamo–pituitary function, resulting in a marked decrease in prolactin and growth hormone levels. 5
Belibi dunked a one-handed alley-oop on the break off an assist from sophomore Avery Vansickle. — Doug Feinberg, The Seattle Times, "Tennessee loses three in a row for first time in 33 years," 14 Jan. 2019 After seeing what happened to me in 2009, Eric Strabel dunked his entire body in the river shortly before his race. — Holly Brooks, Anchorage Daily News, "It’s gonna be a hot Mount Marathon, so racers be warned and spectators stand by — preferably with ice," 3 July 2018 Antetokounmpo was angry that night with Knicks forward Mario Hezonja, who had dunked over him in the first quarter, then stared and stepped over him. — Brian Mahoney, The Seattle Times, "Antetokounmpo powers Bucks past Knicks in Christmas debut," 26 Dec. 2018 This is a movie in which the de-rigueur baptism scene is of the preacher himself being dunked to sober up. — Author: Ann Hornaday, Anchorage Daily News, "Is ‘Damsel’ the first Western for the #MeToo generation?," 28 June 2018 Simons sprinted to the hoop, the big passed the ball and Simons elevated and dunked. — Josh Robbins,, "Edgewater High alum Anfernee Simons enjoys solid NBA debut," 7 July 2018 Here's the proof: top 5 Dennis Smith Jr. dunks this season. — Peter Dawson, star-telegram, "Dallas rookie Dennis Smith Jr. favored in slam dunk contest | Fort Worth Star-Telegram," 15 Feb. 2018 Even a sandwich made from cold ingredients straight from the fridge dunked in hot gravy can be tasty. — Stephanie Wu, Town & Country, "How to: Thanksgiving Leftover Tips from Culinary Stars," 16 Nov. 2015 Three-year-old An Biên specializes in Haiphong-style seafood, like thick bánh da noodles in a rich crab-and-pork broth, or plump mantis shrimp to dunk in a bubbling hot pot. — Peter Jon Lindberg, Condé Nast Traveler, "Hanoi, Time and Again," 20 Nov. 2018
Results: You need a 0 Inch vertical leap to touch the rim and 6 Inch leap to dunk considering that you have to jump about 6 inches over the rim to dunk. To accomplish that you have to leave the ground at a speed of 1.73 m/s vertically no matter how much you weigh. You need a force of 0 Newtons against the ground based on your weight to reach that speed assuming you bent your knees at an angle of 60 degrees. The force depends on how much you bent your knees. Check side bar.
For smaller guys much of the problem, and one I struggled with, is managing the ball. Like most guys my size I can palm a basketball if a grab it carefully, but realistically it isn’t going to happen without a little concentrated effort. Some of those big guys can make a basketball look like a volleyball, and they have no trouble getting hold of it and shoving it over the rim.
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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.
To get your training started, you need a way to measure your jump. If you’re testing your vertical at gym or in a professional type setting, they may have a Vertec. The Vertec is one of the most common apparatus for measuring vertical jump ability. It is the vertical jump-testing device of choice for many college and professional teams, but they also have the budget for such a thing. If you’re wanting to test your vertical in a budget-friendly way, you can easily use a measuring tape, a marked wall, or chalk for marking a wall.

The simplest method to measure an athlete's vertical jump is to get the athlete to reach up against a flat wall, with a flat surface under his/her feet (such as a gym floor or concrete) and record the highest point he/she can reach flat-footed (the height of this point from the ground is referred to as "standing reach"); fingertips powdered with chalk can facilitate the determination of points touched on the wall. The athlete then makes an effort to jump up with the goal of touching the highest point on the wall that he or she can reach; the athlete can perform these jumps as many times as needed. The height of the highest point the athlete touches is recorded. The difference between this height and the standing reach is the athlete's vertical jump.