John Spencer <[log in to unmask]> writes:
<< I know that a research project was done on this exercise (over a bench as
I remember it), in Sweden. Not only did it not reduce back pain nor did it
reduce recurrence rates, nor (suprisingly) did it increase LB strength - I
will try and find the reference. However, I have no doubt that if you teach
an exercise with enough conviction people will respond to it and it is a lot
easier to win their confidence in Lsp active extensions than it is the weird
and wonderful positions we teach TrAb in. >>
*** It is indeed most surprising that these prone back extensions did not
increase LB muscle strength, unless, of course, the well-known principle of
gradual progressive load increase was not followed. If no load or the same
load was used over a prolonged period, then it comes as no surprise that
there was no increase in LB muscle strength -- after all, all adaptation to
higher levels of performance (and this clearly includes all rehab) rely on
optimal stress increase over an extended period of time. Did that study
progressively increase the load? If not, are there are other aspects of
that study which need to be examined in a little more depth?
Dr Mel C Siff
Denver, USA
http://groups.yahoo.com/group/Supertraining/
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