A more accurate method would be to use a Jump Tester (like these here.) The problem with these, obviously, is that they are way too expensive. In fact, the only scenario in which I recommend using one of these is if you’re a coach, trainer, or athletic director who is purchasing it to test a large number of athletes over time and who needs as accurate of a number as possible for scouting purposes.
Keep that in mind, and progress slowly. A mini basketball is a little more challenging than a tennis ball, but it's easy to palm and that helps. See if you can get high enough to get your hand over the rim--almost up to your wrist--so you can stuff the mini ball. If you can't throw it down with a little authority, a bigger basketball won't be any easier.
Among the hundreds of lessons I learned during my youngest child’s first year of life was this: If you earnestly pursue dunking after your athletic peak years of 18 to 30, give or take, it can be done. You can enjoy what it feels like to dunk. You can even feel it more purely than I did, maybe without needing a lob from a friend, and hopefully without all the hand damage. But you should expect a long, frustrating, demeaning war of attrition that pits mind, body, spirit against the most oppressive, unrelenting opponent of them all: gravity. The sun rises and sets, the tides creep in and out—even taxes and death seem negotiable nowadays—but gravity remains constant, forever pounding our shoulders, stooping us shorter as we grow gray, never letting up—no matter what NASA tweets.
Vertical jump training and assisted vertical jump training (essentially with a negative load) can each increase vertical jump height through increases in countermovement depth, even while actually reducing peak force produced in the jump. This seems to happen because the tendon becomes more compliant after these types of training, which means they elongate more during the countermovement phase of the jump.
In 2004, as a high school senior, Candace Parker was invited to participate in the McDonald's All-American Game and accompanying festivities where she competed in and won the slam dunk contest.[51] In subsequent years other women have entered the contest; though Kelley Cain, Krystal Thomas, and Maya Moore were denied entry into the same contest in 2007.[52] Brittney Griner intended to participate in the 2009 McDonald's Dunk Contest but was unable to attend the event due to the attendance policy of her high school.[53] Breanna Stewart, at 6'3" (191 cm), Alexis Prince (6'2"; 188 cm), and Brittney Sykes (5'9"; 175 cm) competed in the 2012 contest; Prince and Sykes failed to complete their dunks, while Stewart landed two in the first round but missed her second two attempts in the final round.[54][55]
At the competitive level (i.e., the NFL and NBA combines), vertical leap is measured using a “jump tester”—a tripod with a series of thin plastic sticks one inch apart. If you have access to this equipment, it’s your best bet for getting an accurate measurement. A cheaper, more feasible option is to do your jump next to a wall and mark the highest point you touch with a piece of chalk.
The back squat and jump squat are the two most commonly-used strength training exercises for increasing vertical jump height. The back squat is clearly more effective for improving maximum force, while the jump squat can be used to shift the force-velocity gradient towards a more “velocity-oriented” profile when required. In addition, the jump squat has the secondary benefit of training force production right through until the muscles are contracting at short lengths, because of its longer acceleration phase. Even so, it is unclear whether squat variations are optimal for improving vertical jump height, because the center of mass is in a different place from in the vertical jump.
In the 2011 NBA contest, Los Angeles Clippers power-forward Blake Griffin completed a self-pass off of the backboard prior to elbow-hanging on the rim. A number of other variants of the elbow hang have been executed, including a lob self-pass, hanging by the arm pit,[23] a windmill,[24] and over a person.[25] Most notable are two variations which as of July 2012, have yet to be duplicated. In 2008, Canadian athlete Justin Darlington introduced an iteration aptly entitled a 'double-elbow hang', in which the player inserts both forearms through the rim and subsequently hangs on both elbows pits.[26] Circa 2009, French athlete Guy Dupuy demonstrated the ability to perform a between-the-legs elbow hang; however, Guy opted not to hang on the rim by his elbow, likely because the downward moment could have resulted in injury.[27]
Smaller observational studies have suggested that treatment with dopamine may be detrimental to patients with septic shock.3,9,10 However, Póvoa et al. reported a lower rate of death among patients treated with dopamine than among those treated with norepinephrine.25 In our study, which included more than 1000 patients with septic shock, there was no significant difference in the outcome between patients treated with dopamine and those treated with norepinephrine.
Yet, rate of force development is likely less important for vertical jumping than for faster athletic movements, such as sprinting. This is because the time that is available for force production is *ten times* longer in the vertical jump than in sprinting. Sprinters often take their foot off the ground before their lower body muscles have achieved maximum force (which takes approximately 150ms), but this early period of rising force production plays only a very small role during vertical jumping.

If you took a poll of the areas athletes wanted to improve the most, their vertical jump would be among the tops. Athletes playing basketball and volleyball rely on their verticals in a number of ways, but one major way is it gives them an edge to stand out amongst their peers. Players want to jump higher and coaches are looking for players that can put some space between their feet and the court.
these shocks make a big difference in handling and ride on the2015 4wd F250. This will make the suspension work rather than the whole vehicle simply shuddering up and down over small bumps and holes in the road. Tires stay in contact with road, suspension moves, you and the seat stay still, what a concept! OEM shocks don't even move once compressed, pityful. You will need an 18 mm wrench or socket for lower shock mount bolts and a 21 mm open end, box end or deep socket for the top mount nut and a 20mm or adjustable wrench for the shaft bolt on the top mount. Once the old shocks are off, you need a 19mm open end or socket for the Bilstein top mount nut and you hold the shaft from moving with a hex key, in my experience I didn't really need that but you may want to. Check the top of the shaft you'll see a hex hole up there, seems like it was a 6mm but don't hold me to that. Forget any jacking, removing tires, etc to do this it isn't necessary, and much safer with wheels on the ground while you are under there. If you need some space I drove the wheel I was working on over a 2x12 and that gave me a little height to work with. I wasn't in the mood to fool with jacks, jack stands and all that. No need to. Just crank the steering wheel over away from the side you are working on and you'll have plenty of room. The only issue is after attaching the lower shock mounts using the OEM 18mm bolt/nut, you need to compress the shock about 3" to get it into the upper mounting hole. I used a common tie down racheting strap for this job. I hooked one hook to the chassis right under the lower shock mount bracket on the truck and after adjusting the strap length I put the upper hook around the top shock rubber grommet and washer (lower one already installed now, put upper ones on after shock is in place, of course). At this point you just crank the rachet on the strap until the shock compresses a few inches and shove the shaft under the mounting hole, release the rachet and up pops the shock into place. Put on upper grommet and washer, tighten 19mm nut and presto! IF the shaft turns while you tighten this nut hold the shaft still with the hex key mentioned earlier. Your truck is now a better place to be. Also just tighten upper nut until the grommet fills or slightly goes outside the washer, don't crank it down and flatten the grommet. If you aren't sure look at the OEM arrangement for an idea on how tight to go with that nut. Happy motoring !!
I gave myself ten weeks to dunk again. It wasn’t going to be easy: I figured I’d need to add five or six inches to my vertical in order to dunk a regulation basketball. I was in half-decent shape, and at six-foot-three, I had height on my side. But I had a few things other than age working against me—namely feet that had flattened over the years to canoe paddles, and an ankle injury I’d never properly rehabbed.

All data were analyzed according to the intention-to-treat principle. Differences in the primary outcome were analyzed with the use of an unadjusted chi-square test. Results are presented as absolute and relative risks and 95% confidence intervals. Kaplan–Meier curves for estimated survival were compared with the use of a log-rank test. A Cox proportional-hazards regression model was used to evaluate the influence of potential confounding factors on the outcome (factors were selected if the P value in the univariate analysis was <0.20).

We purchased this because of its safety evaluation and the high ratings. I did evaluate the negative reviews and was prepared for the issues reported, however; I found none of the comments in the negative reviews to be valid with our experience. First, for the people who complained about the assembly instructions- there are pictures....yes, the English is horrible, but there are pictures! Total assembly time, with one human, was 2 hours and 10 minutes. Assembly of the safety cage was the the most difficult part. Specifically, the foam comes in two sections, which makes it difficult to slide into the pocket. BUT, with a little patience it can be done. Second, to those who would rather purchase a unit from Walmart- this is a very fine product, with consumer quality pieces, they include gloves, spring tool, and a ladder- you don't get ... full review
The materials and information provided in this presentation, document and/or any other communication (“Communication”) from Onnit Labs, Inc. or any related entity or person (collectively “Onnit”) are strictly for informational purposes only and are not intended for use as diagnosis, prevention or treatment of a health problem or as a substitute for consulting a qualified medical professional. Some of the concepts presented herein may be theoretical.
High Reach Jumps – with your feet shoulder width apart, bend down into a comfortable squat position and then jump up as high as you can reaching for the sky! This drill is great to do under the basketball goal or near a wall so you can have a visual of how high you’re jumping – or how low you jump once you start getting tired. Try to reach the same height through all your reps.
Some players thinking jumping off two feet to be more comfortable, but it’s different for every player. Take time while you’re practice your jump to find what’s the most comfortable for you. As you’re learning the right way to jump, comfort is crucial because you don’t want to hurt yourself making a move that feels awkward. You want to be comfortable taking off and landing - and that can be done a number of different ways.

The defining characteristic of the depth jump is that the jump is preceded with the strong eccentric (negative) muscle action caused by dropping down from a raised surface, as opposed to a standard box jump where you start on the floor. This makes the depth jump a true plyometric movement, where the muscles are stretched suddenly (by the impact of the landing), producing a powerful shortening of the muscle fibers.
Nothing generates more excitement in a basketball game than watching the creativity and athleticism of a player flying through the air and finishing with a slam dunk. It can single-handedly change the dynamic of the game and turn a regular player into a star. Although it helps to be tall or have a natural leaping ability, short people can develop the skills required to perform this amazing athletic feat with proper training and technique.
Using only a lifting (concentric) phase for strength training exercises could also be more effective for improving vertical jump height than traditional, stretch-shortening cycle exercises under load, for two reasons. Firstly, using only a lifting phase involves faster rate of force development through higher rate coding, and this may increase high-velocity strength more over the long-term. Secondly, doing stretch-shortening cycle exercises under load *might* cause the tendons to increase stiffness to a greater extent. This would make the muscle lengthen more in the countermovement phase of a jump, and thereby reduce muscle force for a given countermovement depth.

If you make these few exercises a part of your basketball training, you’ll be well on your way to increasing the height of your vertical jump. Be sure to measure your jump height regularly in order to track your progress -- set goals for yourself each week and remain committed. Before long, you’ll be jumping higher and seeing noticeable improvements in your basketball game.
High Reach Jumps – with your feet shoulder width apart, bend down into a comfortable squat position and then jump up as high as you can reaching for the sky! This drill is great to do under the basketball goal or near a wall so you can have a visual of how high you’re jumping – or how low you jump once you start getting tired. Try to reach the same height through all your reps.

Seventy-nine years later, the feat that Daley unwittingly named “the dunk” still flabbergasts. But how it felt to Fortenberry, a pioneering barnstormer whose name we’ve forgotten despite the gold medal he and his teammates won in 1936, remains a mystery. “He never talked about being the first person to dunk and all that,” says 65-year-old Oliver Fortenberry, the only son of Big Joe, who died in ’93. Indeed, the famous dunkers throughout history have been either reticent on the subject or unable to adequately express how it felt to show Dr. Naismith that he’d nailed his peach baskets too low. After more than a year of rigorous research on the subject, I’ve concluded that the inadequacies of modern language—not the ineloquence of the dunk’s practitioners—are at fault. In the eight decades since Fortenberry rocked the rim, words have repeatedly fallen short in describing the only method of scoring, in any sport, that both ignores one of its game’s earliest tenets and, in its very execution, carries a defiant anger.
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.