Friday, December 26, 2008
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Now, lets get to the exercises they say are absolutely contraindicated-certified back wreckers. Scorpians, seated trunk rotations et al. The proponents claim, "significant decrease in the complaints of low back pain since eliminating these exercises".
Jeez, how often were they doing these exercises? Why were they a staple of their repertoire to the point that they were causing back ache? The only application I can see to the scorpion or lying trunk rotations is maybe a wrestler. I'm not a big fan of the contraindicated exercises either, but not for the reasons they give. I'm not done yet. Stay tuned for part 2. Your input please, pro or con.
Sunday, December 14, 2008
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"I am strength coach who uses this exercises, and dont fully understand why you are saying this is not a good exercise.
Also, what do you use/recommend to use instead of this exercise?
Are you also against Glute/Ham Raises, Physioball Leg Curls, and Slide Board Leg Curls."
- Thanks for the great question Rob. In upright function, the hamstrings work as the reins on a horse. With assistance from the soleus, they EXTEND the knee, not flex it; they work DYNAMICALLY at the hip, not isometically; they accelerate or decelerate rotation about the knee (depending on what phase of gait you are in). In the nordic leg curl, half the knee (tibia) is fixed to the ground.
No, I don't use the other exercises very much either. Maybe after an ART session. Remember, the hamstrings- like other muscles, are stimulated by ground, gravity, and momentum. You don't get that with those exercises.
Not to say YOU are wrong. As a matter of fact, Bosch & Klomp use the nordic leg curl in their running book. I don't get it though, I don't feel it fits in with their model of running physiology. One thing I was critical of in the book was the disconnect between theory & conditioning.