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Slow Twitch (Type I)
The slow muscles are more efficient at using oxygen to generate more fuel (known as ATP) for continuous, extended muscle contractions over a long time. They fire more slowly than fast twitch fibers and can go for a long time before they fatigue. Therefore, slow twitch fibers are great at helping athletes run marathons and bicycle for hours.
Fast Twitch (Type II)
Because fast twitch fibers use anaerobic metabolism ...
Scientists from Harvard and the University of New South Wales say they have discovered how to reverse the ageing process.
The research has focused on mice, but early clinical trials have also been conducted on humans.
"We fed them a molecule that's ...
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