The angle between the true vertical and a straight line from the first thoracic vertebra to the first sacral vertebra determines the chance of future disability.
Individuals with the greatest spinal inclination were 3.47 times more likely to need help with daily activities. They were also more likely to have injurious falls.
To reduce this spinal inclination, we must bring back the vertical alignment of T1 over the sacrum, this is achieved by exercising the lower abdominals contracting the transverse abdominus.
References:
http://www.geron.org/About%20Us/press-room/Archived%20Press%20Releases/82-2013-press-releases/1652-posture-provides-clue-for-future-disability
http://www.ncbi.nlm.nih.gov/pubmed/17595423
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