Overall, 309 patients (18.4%) had an arrhythmia; the most common type of arrhythmia was atrial fibrillation, which occurred in 266 patients (86.1%). More patients had an arrhythmia, especially atrial fibrillation, in the dopamine group than in the norepinephrine group (Table 3). The study drug was discontinued in 65 patients owing to severe arrhythmias — 52 patients (6.1%) in the dopamine group and 13 patients (1.6%) in the norepinephrine group (P<0.001). These patients were included in the intention-to-treat analysis. There were no significant differences between the groups in the incidences of other adverse events.
“There aren’t many people in the world who can [dunk], that’s why it has this allure, I guess,” Carter told me last fall, during his first training camp with the Grizzlies. “As far as trying to do it, there are so many ways people can go about it. The approach you’re taking is the right approach. When I was younger, that’s how I started. Tennis ball, to the point that it became easy. Then a volleyball. Then a girls’ ball. Finally I took—it was like a dodgeball. I dunked that and said, ‘You know what, I’m gonna try it.’ Next thing you know. . . .” He shrugged and smiled, the gray whiskers on his jaw sinking into a dimple.

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.
A study was carried out in 2015 to show the effectiveness of different shot types, including slam dunks. The study was carried out across five different levels of basketball (NBA, EuroBasket, the Slovenian 1st Division, and two minor leagues). Overall the study showed that slam dunks were a very effective way of scoring in the game of basketball, particularly in the NBA, which had the highest dunk percentage in the study.[37]

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​
Dunking became a game again. After my closest misses I’d hop around and swear like a golfer whose playoff putt had lipped out. These outbursts were no longer harsh self-admonitions but celebrations of my progress, acknowledgements that I was getting tantalizingly close. I could feel my legs gaining in bounciness. I could feel my hips, quads and calves learning to fire simultaneously. My original lobber returned to the scene and suggested I try dunking in the morning instead of the evening, when the batteries in our old bodies are as low as the ones in our phones. I added this sage advice to the long list of micro­details “that help you steal inches,” as Todd had phrased it months earlier. “A quarter inch here, a half inch there.”

Improve your flexibility by stretching. Stretch your hamstrings and buttocks by laying on your back with one leg crossed over the other at the knee. Pull the lower leg toward you firmly and steadily. This should stretch the hamstring of the crossed leg. For another exercise, touch your toes while seated, standing, with your legs spread, and with your legs crossed.
At pickup the next night, buoyed by the previous day’s accomplishment, I found a regulation ball that had good grip, one I could palm, and in between games, when no one was looking, I dunked for the first time in eleven years. If some dunks are described as thunderous, this one could be best described as a gentle fart in the breeze. But a dunk’s a dunk—and I had dunked.
Data on hemodynamic variables and doses of vasoactive agents are shown in Figure 3 and Figure 4 in the Supplementary Appendix. The mean arterial pressure was similar in the two treatment groups at baseline, and it changed similarly over time, although it was slightly higher from 12 to 24 hours in the norepinephrine group. The doses of the study drug were similar in the two groups at all times. More patients in the dopamine group than in the norepinephrine group required open-label norepinephrine therapy at some point (26% vs. 20%, P<0.001), but the doses of open-label norepinephrine that were administered were similar in the two groups. The use of open-label epinephrine at any time was similar in the two groups (administered in 3.5% of patients in the dopamine group and in 2.3% of those in the norepinephrine group, P=0.10), as was the use of vasopressin (0.2% in both groups, P=0.67). Dobutamine was used more frequently in patients treated with norepinephrine, but 12 hours after randomization, the doses of dobutamine were significantly higher in patients treated with dopamine. The mean (±SD) time to the achievement of a mean arterial pressure of 65 mm Hg was similar in the two groups (6.3±5.6 hours in the dopamine group and 6.0±4.9 hours in the norepinephrine group, P=0.35). There were no major between-group differences in the total amounts of fluid given, although patients in the dopamine group received more fluids on day 1 than did patients in the norepinephrine group. Urine output was significantly higher during the first 24 hours after randomization among patients in the dopamine group than among those in the norepinephrine group, but this difference eventually disappeared, so that the fluid balance was quite similar between the two groups.

Stand with your feet shoulder-width apart. Keeping your back straight, bend at your knees and hips as if you are attempting to sit in a chair until your thighs are parallel with the floor. Simultaneously extend your arms straight out in front of you. From this position jump up, straighten your legs and swing your arms back down to the side of your body. Repeat 25 jumping squats in a row for three sets with a 1-minute break between sets.
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.

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.
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.
Then, in terms of exercises, you really need to get your whole body stronger. You need to improve your core, and obviously you need to improve your legs. So someone who is interested in jumping higher will find themselves doing a lot of squats. And I would suggest that if someone just started this, they could do a lot of squat exercises without even going to the gym or even bearing weight. You know, get up in their office cubicle and do ten squats. Three sets of ten reps of squats is a good workout.

Because of the possible combinations of starting and finishing hands, and raised-legs, there are many variations on the basic under-the-legs dunk—more so than any other.[17] For example, in a 1997 French Dunk contest, Dali Taamallah leapt with his right leg while controlling the ball with his left hand, and once airborne he transferred the ball from his left hand, underneath his right leg to his right hand before completing the dunk.[18] NBA star Jason Richardson has also pioneered several notable variations of the between-the-legs including a lob-pass to himself[19] and a pass off of the backboard to himself.[20] Independent athlete Shane 'Slam' Wise introduced a cuffed-cradle of the ball prior to initiating the under the leg transfer and finishing with two-hands.[21] While a number of players have finished the dunk using one- or two-hands with their backs to the rim, perhaps the most renowned variant of the dunk is the combination with a 360°, or simply stated: a 360-between-the-legs. Due to the athleticism and hang-time required, the dunk is a crowd favorite and is heralded by players as the preeminent of all dunks.[citation needed]


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

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]

You can assist in recording your score by holding a piece of chalk in your had and using it to mark the wall. If the wall already has horizontal lines, such as a brick wall, it will be easier to mark your jump height. Have as many attempts as you need to get the best possible score. Practice your technique, as the jump height can be affected by how much you bend your knees before jumping, and the effective use of the arms.


My son asked me to get book to help improve his jump and was thrilled with the terrific tips it gave him. According to him, this book covers all the important basics and is a must-read for anyone looking to increase their athletic performance. The exercises are described in a clear, easy to follow manner...and now that I've read it as well I'm happy to say, I understand more of what my son is always going on about! ;)
James Naismith, I learned, was a bit different. “I was only three when he passed away [in 1939],” said his grandson, James Naismith, 78, of Corpus Christi, Texas. “He was known as a tenderhearted man, but he also had”—the doctor’s namesake pauses—“the polite term is ‘firmness of mind.’ It’s kind of a family trait. He devoted his life to improving the lives of others through physical activity, through games. That took time.

The vertical jump is one of the most explosive physical movements executed in sport. In a number of sports, the higher the athlete is able to jump, the greater the prospects of success in that discipline. Basketball and volleyball are the two most prominent examples of sports where that correlation is plain. The jumping ability of an athlete is also an indicator of overall athletic ability, as there is a clear relationship between the ability to jump and the running speed that the athlete will develop over short distances. The National Football League, where prospective players are subjected to various physical tests, requires every player to be tested for both vertical leaps and 40-yd (37 m) sprints, irrespective of the position played.
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