How does the duration of a walk affect its effectiveness? Detailed answer

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How does the duration of a walk affect its effectiveness? Detailed answer

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How does the duration of a walk affect its effectiveness?

A group of employees of the Department of Physical Therapy at the Medical College in Kent (UK) proved that walking affects the composition of the blood. They selected 56 sedentary volunteers and divided them into four groups.

One group had to take a walk lasting 20-40 minutes daily, the second - two walks of 10-15 minutes, the third - three of 5-10 minutes. The fourth group sat at home in front of the TV. Before the start of the experiment, the blood levels of lipoproteins were measured in all of them - compounds of proteins with fat that contribute to the development of atherosclerosis. This continued for 18 weeks, after which the analysis of blood fats was repeated.

For those who walked for a relatively long time, the content of the most harmful lipoprotein fell by 50 milligrams, for the "intermediate" this drop was twice as modest, and for those who walked three times, but little by little, the content of the dangerous substance was reduced by only 10 milligrams.

So long walks are most effective. In "sedentary" content of lipoproteins remained, of course, the same.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

Why did the Lords of the Admiralty still promote the son of a farmhand, James Cook, to an officer?

Alistair MacLean, one of the biographers of the great navigator James Cook (1728-1779), puts it this way.

In the middle of the XVIII century, many scientists were convinced that in the southern hemisphere there was a giant continent encircling the globe. By this they had in mind not Antarctica, but a temperate continent, which, as they assumed, should occupy the entire South Pacific Ocean and extend all the way to South America and New Zealand.

The Lords of the English Admiralty decided to send an expedition to search for this continent. Hiding its intentions from rivals, the main of which were French sailors, officially the Admiralty only provided one of its ships to a group of astronomers of the Royal Society. Scientists were going to go to the Pacific Ocean to observe the passage of Venus through the meridian (that is, between the Earth and the Sun) on June 3, 1769.

Considering the issue of choosing the leader of the planned expedition, the Admiralty came to the conclusion that James Cook was almost the only person capable of carrying it out. The expedition had to penetrate into unfamiliar waters, face the most unexpected weather conditions - such an enterprise could only be done by an outstanding navigator, which, no doubt, was Cook.

A sailor was required who could determine his location at any time - in terms of navigational skill, Cook had no equal. Finally, a person was needed who was qualified enough to lead the expedition of the Royal Society - Cook was also suitable for this role, because he was a capable astronomer and a few years earlier, while in Canada, had made successful observations of the passage of Venus (on behalf of the same Royal Society) .

By this time, Cook was already 40 years old, since 1764 he commanded a schooner, but remained only a non-commissioned officer. Even realizing that in the person of Cook they have the greatest navigator, navigator and cartographer, the Lords of the Admiralty did not want to issue an officer's patent to a man who came from a despicable merchant fleet, began his service on a warship as an ordinary sailor, was poor and obscure.

However, it was impossible to send a warship around the world under the command of a non-commissioned officer. First, it would call into question the competence and ability of those who held officer ranks. Secondly, it would look ridiculous in the works of future historians. That is the only reason why the lords of the Admiralty promoted the great navigator to lieutenant.

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