The Skeletal Muscle System. Skeletal muscles are the muscles found in your legs and arms and throughout the body. The skeletal system is different from the smooth muscle system in organs like your liver and the cardiac muscle in your heart because the skeletal muscles contract voluntarily.he skeletal system is different from the smooth muscle system in organs like your liver and the cardiac muscle in your heart because the skeletal muscles contract voluntarily.
With the benefit of breathing pure oxygen first, the current Guinness World Record for holding your breath underwater is held by Ricardo Bahia of Brazil at a whopping 20 minutes 21 seconds! Most people in good health can hold their breath for approximately two minutes.
The current record for pure breath-holding is 22 minutes, set by Stig Severinson in May of last year. And you probably remember David Blaine sitting in a bubble for 17 minutes 4 seconds. That is far longer than the 30 or 40 seconds most of us can hold for, to a really phenomenal degree.yclist Miguel Indurain has massive lungs for a non-diver (8 liters), and they were reportedly large enough to displace his stomach, which gave him a trademark paunch. Chances are you won't need to hold your breath for 20 minutes in your lifetime, or even 5 minutes.