Tag: Sports medicine

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Suck This ‘Magic Hormone’ into Your Body and Transform Your Health – Takes Just 20 Minutes

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A recent study published in the journal Mechanisms of Aging and Development confirms the “anti-aging” effect of high-intensity training.

Telomere shortening occurs as you age, however the factors involved are not entirely understood as of yet. The study was conducted to determine whether age-associated telomere shortening is related to habitual endurance exercise and maximal aerobic capacity.

The results suggest there’s a direct association between reduced telomere shortening in your later years and high-intensity-type exercises.

The authors’ state:
“The results of the present study provide evidence that leukocyte telomere length (LTL) is related to regular vigorous aerobic exercise and maximal aerobic exercise capacity with aging in healthy humans.

LTL is not influenced by aerobic exercise status among young subjects, presumably because TL is intact (i.e., already normal) in sedentary healthy young adults.

However, as LTL shortens with aging it appears that maintenance of aerobic fitness, produced by chronic strenuous exercise and reflected by higher VO2max, acts to preserve LTL.

… Our results indicate that leukocyte telomere length (LTL) is preserved in healthy older adults who perform vigorous aerobic exercise and is positively related to maximal aerobic exercise capacity. This may represent a novel molecular mechanism underlying the “anti-aging” effects of maintaining high aerobic fitness.”

But that’s not all.
High-intensity interval-type training also boosts human growth hormone (HGH) production. A 2003 study published in the journal Sports Medicine found that “exercise intensity above lactate threshold and for a minimum of 10 minutes appears to elicit the greatest stimulus to the secretion of HGH.”

Resources:
Mechanisms of Ageing and Development February 2010;131(2):165-7
Sports Medicine 2003;33(8):599-613
Sports Medicine 2002;32(15):987-1004
Growth Hormone and IGF Research December 2008;18(6):455-71
Journal of Applied Physiology 2005; 98: 1985–1990
Journal of Applied Physiology 2005; 98:1983-1984

Posted by: Dr. Mercola. December 24 2010

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Exercise Featured

Aerobics at Middle Age Delays Aging

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A new study has found that staying aerobically fit, especially through middle age and beyond, can delay biological aging by up to 12 years and prolong independence during old age.

Aerobic exercise, such as jogging, swimming, cycling or walking – improves a person’s oxygen consumption and boosts their metabolism.

But maximal aerobic power starts to fall steadily from middle age, decreasing by around 5 ml/ [kg.min] every decade.

When it falls below around 18 ml in men and 15 ml in women, it becomes difficult to do very much at all without severe fatigue.

In a typical sedentary man, the maximal aerobic power will have fallen to around 25 mil/ [kg.min] by the age of 60, almost half of what it was at the age of 20.

But the evidence shows that regular aerobic exercise can slow or reverse the inexorable decline, even in later life.

Research by scientists at the University of Toronto in Canada has shown that high-intensity exercise, taken regularly for more than a year, can boost maximal aerobic power by 25 percent, equivalent to a gain of 6 ml/ [kg.min], or 10 to 12 biological years.

“There seems good evidence that the conservation of maximal oxygen intake increases the likelihood that the healthy elderly person will retain functional independence,” an author said.

The other positive spin-offs of aerobic exercise are reduced risks of serious disease, faster recovery after injury or illness, and reduced risks of falls because of the maintenance of muscle power, balance, and coordination.

The results are published in the British Journal of Sports Medicine .

Sources: The Times Of India

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