Thanks for the references Mel
I tend to agree with your thesis regarding structural anomalies often being
red herrings.
On the other hand the research is ambiguous.
I like the experiment performed in 1941 when a 1/2 inch leg lift was added
to non-symptomatic individuals and many of them developed low back pain as a
result. (Hudson, OC, Hettesheimer CA, Robin PA, Causalgic Backace (Am J Surg
54: 297 - 303, 1941)
John Spencer
----- Original Message -----
From: <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, September 30, 2002 3:40 PM
Subject: Mechanical Factors and LBP?
> John Spencer <[log in to unmask]> writes:
>
> << Mel-- In your post you say that : "research findings (suggest) that
> muscle endurance is such an important factor in stabilising the spine".
>
>
> Have you got references for studies that associate muscular endurance with
> low incidence of low back pain?
>
> I fear that perhaps you are confusing the research concerning dynamic
> stability again. >>
>
> *** For the research on muscle endurance and spinal stability, see any of
the
> recent articles and the new book by McGill (Human Kinetics). For the
lumbar
> endurance and LBP studies, here are a few of the many references that are
> available. Other list members might like to add a few more - or you might
do
> the same if you care to expend a little time on searching Medline or
reading
> through some of the many references at the back of McGill's book before
you
> fear anything else again.
>
> Spine 2001 Apr 15;26(8):897-908
>
> Active therapy for chronic low back pain - Effects on back muscle
activation,
> fatigability, and strength.
>
> Mannion AF, Taimela S, Muntener M, Dvorak J.
>
> SUMMARY OF BACKGROUND DATA:
>
> .... Many studies have documented an association between chronic low back
> pain and diminished muscular performance capacity. Few studies have
> quantified the changes in these measures following interventions using
> objective measurement techniques or related them to changes in clinical
> outcome.......
>
> ----------------
>
> Spine 1997 Feb 15;22(4):418-25
>
> Spectral and temporal responses of trunk extensor electromyography to an
> isometric endurance test.
>
> Sparto PJ, Parnianpour M, Reinsel TE, Simon S.
>
> SUMMARY OF BACKGROUND DATA: Isometric endurance tests appear to have more
> value than strength tests in predicting the occurrence of low back pain.
> Electromyographic activity of trunk extensor muscles during these tests
may
> provide clues to the etiology of neuromuscular-based low back pain.
Spectral
> EMG measures appear to be successful discriminators between low back pain
> patient and normal populations, although which muscles provide the best
> information is unclear......
>
> -----------------
>
> Arch Phys Med Rehabil 1996 Jan;77(1):75-9
>
> Lumbar trunk muscle endurance testing: an inexpensive alternative to a
> machine for evaluation.
>
> Ito T, Shirado O, Suzuki H, Takahashi M, Kaneda K, Strax TE.
>
> CONCLUSIONS: This study demonstrated that our methods for measuring trunk
> flexor and extensor endurance had high reliability, reproducibility, and
> safety, and were easy to perform, with no need for special equipment. This
> study also showed that trunk muscles in patients with CLBP were more
easily
> fatigued, compared with those in healthy subjects.
>
> -------------
>
> Phys Ther 1999 Nov;79(11):1032-42
>
> Endurance training of the trunk extensor muscles in people with subacute
low
> back pain.
>
> Chok B, Lee R, Latimer J, Tan SB.
>
> CONCLUSION AND DISCUSSION: Trunk extensor endurance training reduced pain
and
> improved function at 3 weeks but resulted in no improvement at 6 weeks
when
> compared with the control group. Endurance exercise is considered to
expedite
> the recovery process for patients with an acute episode of low back pain.
>
> -------------
>
> Arch Phys Med Rehabil 1998 Apr; 79(4):412-7
>
> Back and hip extensor fatigability in chronic low back pain patients and
> controls.
>
> Kankaanpaa M, Taimela S, Laaksonen D, Hanninen O, Airaksinen O
>
> CONCLUSIONS: ...... the shorter endurance time indicated greater
fatigability
> in the chronic low back pain group in general. The chronic low back pain
> patients were weaker and fatigued faster than the healthy controls. The
EMG
> fatigue analysis results suggest that the gluteus maximus muscles are
more
> fatigable in chronic low back pain patients than in healthy control
subjects
> during a sustained back extension endurance test.
>
> ----------------
>
> Dr Mel C Siff
> Denver, USA
> http://groups.yahoo.com/group/Supertraining/
>
|