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Explaining why women were barred from marathons, Kathrine Schwitzer said that it was thought that marathons were ‘dangerous, de-sexing and de-feminising for a woman.’But since then, women have even beaten men in extreme endurance events.Last year American cyclist Lael Wilcox became the first woman to win the Trans Am, a 4,300-mile race from Oregon to Virginia, which took her just over 18 days as she trounced male riders.

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The speed, power and torque of their movements and electrical activity of their muscles was then captured and recorded over time.

It was followed by women runners taking five outright victories in ‘ultra marathons’ across the US, with 42 year old Caroline Boller setting a new course record at the Brazos Bend 50 mile trail race in Texas.

Now Brian Dalton, professor of neurophysiology at the University of British Columbia, Canada, has revealed women are considerably less exhausted after natural, dynamic muscle exercises than men of similar age and athletic ability.

The first woman to compete in the Boston Marathon, Kathrine Switzer, only did so in 1967 – and had to disguise herself as a man.

Women only competed in the marathon at the Olympics from 1984 onwards.

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We have Full hardcore Young Women sex tube videos that you can see absolutelly for free!Professor said: ‘The answer is pretty definitive: women can outlast men by a wide margin.’Both sexes performed equally well at the beginning of the test - but fatigue set in earlier for the men, he explained.Professor Dalton said: ‘When we extend the paradigm to a large number of contractions, like 200, that is when we start to see differences.; Nine women and eight men were hooked up to dynamometers to measure speed, power and torque during the exercises.While only one isolated muscle group was studied, Professor Dalton says he would expect similar results for others.He said that while there was not a standardised ‘ultra-marathon’ distance, ‘We know from previous research that for events like ultra-trail running, males may complete them faster but females are considerably less tired by the end.He said: ‘We chose to measure foot movements because it makes use of calf muscles on the back of the leg, which are essential for practical, everyday tasks like standing and walking.‘What we found is that males were faster and more powerful at first but became more fatigued much faster than females.’Runners need to move 15 per cent faster on a treadmill to burn the same number of calories as jogging outdoors, research reveals.

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