曝光台 注意防骗
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Torso, Head, Arms, Legs
The Torso
The torso is the catalyst to everything you do in freefall. As the torso is the centre of your
body as a whole, it has a direct influence on how both the upper and lower limbs behave.
Your torso is the key to your balance because it represents your whole body’s centre of
gravity. At the centre of your torso is your spine.
Check 1: TORSO, RELAXED AND STRAIGHT
TORSO: The most common problem with skydivers progressing away from student
status is that they arch too much. Whether having progressed through AFF or RAPS, the
arch will have been drilled into the student for a very good reason, Stability. Arching
produces a low centre of gravity which provides stability but arching in the conventional
student position drastically reduces range in fall rate control and efficiency in mobility.
Fig. 1
Fig. 2
A good neutral position will require a very relaxed arch. The spine also needs to be straight
and its worth knowing that no matter what move you make as you progress through your
FS1, your torso should always remain straight as shown in fig.1
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Check 2:
HEAD: Just think head up. If your torso is in a good position then your head will be
too as it is an extension of the spine.
Your Limbs
To achieve a balanced neutral flying position you must understand that the human body is
symmetrical in its structure. Pay particular attention to this fact, since the action of
positioning your limbs when flying will create a reaction of either solid powerful moves or
a series of inconsistent compensations. Maintain symmetry with your limbs and you will
maintain balance.
Check 3: ARMS – ELBOWS DOWN AND OUT
ARMS: Again, the student positioning of the arm can be seen as a bad habit if you
want to improve your flying position. Having a wide arm stance is great for stability. Think
of a child’s bike with stabilizers. However if you want that child’s bike to go fast around
corners then the stabilizers will have to come off! Your arms need to be in a position of
mobility i.e. in a grip taking position, as well as maintaining equal air pressure to that of the
legs. There are many instances in everyday life that mirror the way the arms should be
position for maximum mobility. The most accurate of these is the way that the handlebars
on motorbikes are positioned. Each handle is positioned at 45-degree angle to compliment
the natural physiology of the forearms and this in turn, provides the rider with the most
comfortable, natural and efficient way on controlling the bike.
Your elbows should be wider and lower than your shoulders as shown in Fig. 3. It’s
common for your hands to be too close to the face – get them out, think more surface area
as shown in Fig. 4.
Fig. 3 Fig. 4
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Check 4: LEGS NOT TOOWIDE, FEET IN THE AIR
LEGS: A common area for improvement for students and even experienced
skydivers is in their leg position. As we know, being wide in a stance provides great
stability. However legs being too wide can cause problems such as de-arching of the hips.
Legs are also often too bent which reduces the overall effective surface area of the body in
freefall. One of the reasons these problems arise is due to the fact that you rely on feeling
for leg positioning as you can’t see what they are actually doing and our sense of feel is
often deceiving. Understand that as limbs go, your legs are much bigger than your arms so
they place a vital role in your position
Fig. 5
A good visual reference to what your legs are doing is to look at your arms. If you are
falling straight down (i.e. not back sliding) and you can see that your arms are close to your
head then your legs must be tucked up or too bent. To find your neutral leg position stand
over a mat with feet about shoulder width apart, then crouch down lean forward and lie on
your front without parting your legs any further. Next consciously think point toes but not
straight up but about 45 degree to the ground as shown in fig. 5 & 6. Your toes are an
extension of your legs.
Fig. 6
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Coaching Lesson
The aim of this lesson is to teach:
The Neutral Flying Position
Training Aids: Coach, DVD, Video, Mirror, Bean Bag, Jumpsuit, Altimeter.
Revision: Study the theory to the neutral flying position and talk through the
checklist. Also, emergency procedures where appropriate.
Explanation: Explain theory to achieving a neutral flying position.
Demonstration: Using an assistant or a freeze frame of the video, demonstrate the
position as a whole. Break the position into parts and demonstrate
the checklist.
Imitation: Student to go through checklist.
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