The patient’s position and the exercise are the same as in the third procedure, but now a fixating belt is placed at or just below the segments to be extended. The safety belt is the first simple external aid, used to enhance maximum extension. It does so by preventing the pelvis and lumbar spine lifting from the couch. Other methods of restraint may be used effectively, for example the body weight of a young son or daughter when exercising at home.
Fig. Extension in lying with belt fixation.
This procedure creates a greater and more localised passive extension stress than the previous ones. It is particularly suitable for stretching in the case of extension dysfunction, and is more often required in dysfunction than in derangement.
In dysfunction some pain will be experienced in the small of the back while exercising, because contracted tissues are being stretched. In derangement the rules pertaining to the centralisation phenomenon must be observed, and the procedure stopped if peripheral pain is produced or increased.