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......
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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.
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Dr Mel C Siff
Denver, USA
http://groups.yahoo.com/group/Supertraining/
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