Basic knowledge of boutique coffee caffeine helps improve endurance

British scientists have found that consuming large doses of caffeine before relatively low-intensity exercise can significantly increase muscle strength and endurance. This discovery may help long-distance runners improve their performance.

Increase in physical endurance

Researchers at the University of Coventry conducted experiments on mice to study the effects of caffeine on energy output and endurance in mice under maximum and sub-maximum exercise.

Muscle activity is divided into maximum exercise and sub-maximum exercise. The former involves fast running, weightlifting and other sports that make the muscles the most tense, while the latter generally refers to all other sports, including daily tricks such as flipping books and strenuous physical exercises such as running a marathon.

The researchers found that when the concentration of caffeine in mice reached 70 micromoles per liter, the body's energy output increased by about 6%, in both exercises.

This concentration significantly reduces endurance in maximum exercise, but increases endurance in sub-maximum exercise.

Researchers believe that caffeine has a similar effect on the human body.

Dr Rob Jeames, who led the study, said: "70 micromoles is usually the maximum level of caffeine that can be reached in human blood. People who regularly consume caffeine can easily reach a concentration of 20 to 50 micromoles. "

Not a stimulant.

The researchers reported their findings at the annual meeting of the Society for Experimental Biology in Prague, Czech Republic, on June 30.

They explain that caffeine in the blood acts on the receptors on the skeletal muscles, causing the muscles to produce more energy.

Jeames says consuming very high doses of caffeine is feasible and may be attractive to some athletes who want to improve their performance. Intake of high doses of caffeine can be achieved by taking tablets, powders or concentrates.

"A little improvement in performance through caffeine intake may mean the difference between gold and silver medals at the Olympics," the Daily Telegraph quoted Jeames as saying.

The World Anti-Doping Organization previously banned caffeine and removed it from the banned drug list in 2004.

Americans like to drink.

Previous surveys have found that Americans like coffee best. They ate an average of 400 milligrams of caffeine per person per day, equivalent to two to four cups of coffee. Worldwide, the average daily caffeine intake per person is 70 mg.

In fact, caffeine is not just in coffee. Tea, soft drinks, some medicines and chocolates also contain caffeine.

Many athletes feel that drinking coffee reduces sports fatigue, but some athletes think that coffee is beneficial to urine and is easy to cause dehydration.

"caffeine may cause dehydration during marathons," said Marla Runyan, a famous American blind long-distance runner. "caffeine causes dehydration more than it clears your head."