User Manual
Page 13 of 22
Version 1.2
8.5
Back extension/flexion Art. 10666600
Purpose of Use
At this unit is trained by bending forward and backwards the trunk the dorsal and ventral trunk and core
muscles.
Specific Positioning of Customer
Starting position / Positioning
Adapt the saddle seat depending on body height to an appropriate height that a half-standing position is
received. The feet should be aligned on the markers at the footplate symmetrically. Forearms need to be
balanced in stable position at or on the padded rollers. Use the handles, if necessary, to facilitate the
control (not a requirement!). Stabilize the upper body and shoulder girdle by active tensing the torso
muscles.
Movement Description:
Before the initial phase of flexion contract the abdominal muscles, especially the core muscles. Start by
contracting the flexor muscles by initialization of strength on the forearm pad and roll the upper body with
segmental diffraction. In the extension movement extend the trunk by pressing against the roll pad.
Head control: in the flexion phase the chin needs to lead to the chest by rolling in the trunk. In the
extension phase the head should only be extended up to the extension of the back.
Special note:
Do perform the flexion up to the point no pelvic flexion happens. In the extension movement do stop at
the normal physiological lordosis. Always control the movement by not swinging. The breathing-out needs
to be done in the flexion phase. With problems in the lumbar spine perform only very cautious and slowly.
Performing Muscles
Back extension:
M. erectores
M. longissimi
M. interspinales
Back flexion:
M. rectus abdominis
Mm. obliqui abdomini
M.transversus abdominis
Technical Data
Dimensions (L x W x H):
120x80x155 cm
Total weight:
115 kg
Maximum allowance of body weight: 200 kg
