 to ground rather have some trajectory angle but the angle deviation is small. At the point of planting your take off foot on the ground, your body posture should be erect. The knee should not flex much as more flexing in the knee causes loss of speed and strength. Some other important aspects that an athlete should keep in mind while doing take-off are −
One should drive his lead leg upward parallel to the bar.
To the left of the final approach direction, the hand should be driven parallel to the bar.
Before leaving the ground the back should not be turned towards the bar.
Shoulders should not be dropped while getting nearby to the bar.
The shoulder which is nearer to the bar can be kept at a little bit more height than the other one.
Speed and jump are directly proportional to each other. More is the speed, higher will be the jump. The athlete should determine his optimal speed at which he is more comfortable with. Determination of the above is not a difficult task though. Starting from initially with each practise session, the athlete should go on increasing his speed till his foot does not get buckle while jumping.
Clearance of Bar
All the necessary actions that are required for a successful bar clearance need to be done before taking off. Because once an athlete leaves the ground it is very difficult to make any further actions over air. Rotation of head mainly becomes difficult in clearing bar but a little bit practise and correct approach will take care of that.
Analyse what body parts of yours can possibly touch the bar while you are clearing it. Such as hands, elbows, head, hip and sometimes legs too. Know exactly how to avoid that. For example it is a general piece of advice that you should not drop your head down until you cross the bar. Similarly your hands should be alongside of your body in such a manner that it will result in a huge arc. Some other general advices are −
Feet should be kicked up quickly as soon as you cross the bar.
You should not stretch your leg while moving up; instead bent your knees to have a good rotation over the bar.
By default front knee would be in bent position from the starting.
Make sure to maintain that posture. However the take-off leg should be brought to a bent position along with the lead leg during the process.
Hands should be kept tight with respect to body but you can wrap around towards your feet also. This will serve you dual benefit; it will prevent you from touching bar and will speed up your rotation.
To increase the speed, always try to keep your arms and legs as close as possible to the centre of gravity. This is the only possible way in which a jumper can increase his speed of rotation after take-off.