Healthcare and Medicine Reference
In-Depth Information
Fig. 10.6 Tennis player. (© i Stockphoto.com, reproduced with
permission. Photograph by Michael Krinke.)
Fig. 10.7 Golfer at the end of a drive. (© i Stockphoto.com,
reproduced with permission. Photograph by Denise Kappa.)
In the torso, the power is passed to three lines in the
trunk. First, the Front Functional Line continues the
power in a straight line from the pectoralis major and
the rectus abdominis through the pubic symphysis to
the left adductor longus, which is pulling the left thigh
a bit forward to counterbalance the right arm. Second,
the right Spiral Line is shortened, turning the head to
the right, pulling the left shoulder around the rib cage,
and shortening the distance from the left ribs to the right
hip. The left Spiral Line is conversely stretched or
lengthened. Thirdly, these two are assisted by the Lateral
Lines, where the left is shortened for stability, and the
right is fully lengthened for reach. During the shot and
follow through, the right Lateral Line and left Spiral
Line will shorten along with the right Front Functional
Line to provide more power.
When one is airborne, the only counterbalance to the
weight of the racket and ball is the inertia of the body
itself. We have seen how the weight of the arm is playing
against the inertia of the left leg, but it is also working
against the inertia of the core - the weight of the pelvis
and upper legs themselves. This drawing on the stabil-
ity of the core, represented in our scheme by the Deep
Front Line, can be seen here in the supination of the feet
and the pulling of the DFL structures up the inner line
of the leg into the underside of the pelvis. This 'gather-
ing' in the core is essential to the power and precision
of the shot.
tion of the helical lines in motion. The entire upper part
of the right Spiral Line, from the right side of the head
around the left shoulder and ribs to the right hip and on
down into the right arch, is clearly and evenly stretched
- except for the head which must counter-rotate to
follow the path of the ball. The left SPL is conversely
contracted, right down to the supinating left foot. These
lines were in opposite states of length at the beginning
of the swing.
The only quarrel we might pick is with the height of
the right shoulder, which is being restricted by the (out
of sight) rotator cuff of the Deep Back Arm Line, causing
the shoulder to lift slightly at this phase of the swing.
In terms of front-back balance, the Superficial Front
Line is for the most part opened and stretched, espe-
cially on the right side, with the Superficial Back Line
shortened, creating a bow to the body upon which the
spirals are laid. Again, the swing starts with the SFL
short and the SBL long, so this contraction lifts the head
and rib cage during the latter part of the swing.
The weight on the legs has shifted to the inner part
of the right foot (and right on past, at the moment of
this picture) and onto the outside of the left foot. This
involves a contraction of the Deep Front Line on the left
leg (in addition to the contraction in the SPL already
noted) and a stretch in the Lateral Line on the outside
of the left leg. This balance between the Deep Front Line
on the inner line of the leg and the Lateral Line on the
outer aspect of the leg is crucial to remain centered on
the legs while the Spiral Lines roll the weight through
to the inside of the following foot and the outside of the
leading foot. If these lines do not maintain a coordinated
Golfer (Fig. 10.7)
This golfer, caught at the final moment of follow-through
from a fairway shot, demonstrates a pleasing integra-
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