1 year ago

A new study out of the University of Denmark has shown a clear positive link between a specific type of exercise and the health of our motor neurons, our muscles and our nervous system.
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New research into weightlifting has revealed two insights:
That the practice is able to strengthen the connections between nerves and muscles, and
That this strengthening can still happen in the later years of our lives.
We actually start losing muscle mass before the age of 40, caused in part by a reduction in muscle fibers that happens as motor-neurons start to breaks down. Motor-neurons are cells in the brain and spinal cord that tell our bodies to move.
This decline can't be stopped, but this new study shows that it can be slowed down, and slowed down significantly.
According to the study's results, weight training makes the connections between nerves and muscles stronger, protecting the motor-neurons in the spinal cord, these are essential for a well-functioning body.
Exercise physiologist Casper Søndenbroe PhD from the Institute of Sports Medicine at Copenhagen University, Denmark said "Previously, researchers have been unable to prove that weight training can strengthen the connection between the motor neurons and the muscles. Our study is the first to present findings suggesting that this is indeed the case."
You may ask ‘why hasn’t this been attempted before?’ In the main it is because of the challenges inherent in sampling enough tissue, at locations where muscle and nerve cells connect, so meaningful measurements can be made.
To overcome this, the researchers instead looked for biomarkers related to the stability of the junctions between neurons and muscles in the biopsy samples of participants.
The research involved 38 healthy, elderly men, with an average age of 72. They were asked to undertake a 16-week course of fairly intensive weightlifting training that involved leg presses, leg extensions, leg curls, and two upper arm exercises.
Another group of 20 healthy, elderly men, again with an average age of 72, did no weight training and were used as a control comparison.
So, how often did they train?
Weight training sessions happened three times a week, and after two months (that was halfway through the experiment), the differences in muscle size and fitness could be seen. Researchers collected muscle biopsies and found detectable changes in the biomarkers.
From twinges in the back to pain in the knees, the indication is that weight training can slow down some of this breakdown between our muscles and our nervous system, without actually reversing it.
The researchers suggest that starting earlier in life can build up 'reserves' that the body can then fall back on when needed.
Dr. Soendenbroe said "The study shows that even though you begin late in life, you can still make a difference.
Of course, the sooner you start, the better, but it is never too late – even if you are 65 or 70 years old. Your body can still benefit from heavy weight training."
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