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.
Indeed, the average person canât hold their breath for more than 30 seconds or so â and even someone in excellent health is gasping by two minutes.Sietas pictured at the start (left) and finish (right) of the new breath-holding record of 18 minutes and 16 seconds in a water tank.t is fascinating to note that humans can hold their breath for twice as long underwater as they can on land with their mouth and nose closed (the record stands at around ten minutes).