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Old 01-25-2010, 10:13 AM   #5
C. David Henderson
Location: Santa Fe New Mexico
Join Date: Sep 2008
Posts: 606
Re: Long tern effects on the body from Internal Trainig, is there a risk?

Very interesting: from the abstract of

Results: The medial hamstrings and medial head of gastrocnemius muscle groups maintained low low activity, with higher electromyographic values in the lumbar erector spinae and substantially higher ones in the rectus femoris during the push movement. Both concentric and eccentric contractions occurred in muscles of the lower limbs, with eccentric contraction occurring mainly in the anti-gravity muscles such as the rectus femoris and the medial head of gastrocnemius. The forward and backward shifts in centre of gravity (CG) were mainly accomplished by increasing and decreasing respectively the joint angles of the bilateral lower limbs rather than by adopting a forward or backward postural lean. The path of the CG in the anteroposterior and mediolateral component was unique, and the sway or deviation from the path was small. The master maintained an upright posture and maintained a low CG (hips, knees, and ankles bent) while travelling slowly and steadily from one position to another.

David Henderson
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