Advance acoustic Impress 4 Pierwsze kroki - Strona 11

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1. Position your body on the seatshell
a
If your centre of gravity is too far back
(feet in the air) push it forward by
pulling in the lower back straps – or
vice versa.
b
Then adjust the middle back straps (in
or out) until your lower back (lumbar
spine) is comfortably supported.
A comfortably supported back without
ƒ
the feeling of straps under the armpits is
a good indication of an ideal position in
the seat shell.
2. Setting the upper body recline angle
c
This angle is set by the upper back
straps.
d
Now you should adjust the shoulder
straps so that they lie loosely on the
shoulders.