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Second wind is a phenomenon in distance running, such as marathons or road running whereby an athlete who is out of breath and too tired to continue. Second wind also occasionally referred to as the wake maintenance zone, is a sleep phenomenon in which a person, after a prolonged period of staying awake, .
Definition of second wind. Examples of second wind in a Sentence The sight of the finish line gave the runners a second wind. He suddenly got his second wind and was able to complete the project on time.
Recent Examples on the Web But the second half break seemed to give the 'Vatreni' a second wind that lasted long enough for Mario Manduzkic to score a historic second goal in extra time and send Croatia into uncharted waters. Union, 45 and married to the N. Bush, a second wind in But Can He Still Help? First Known Use of second wind , in the meaning defined above. Learn More about second wind.
Resources for second wind Time Traveler! After some time the veins and capillaries dilate and cooling takes place more through the skin, so less heavy breathing is needed.
Hypersomnia Insomnia Kleine—Levin syndrome Narcolepsy Sleep apnea Central hypoventilation syndrome Obesity hypoventilation syndrome Sleep state misperception. This article is about the sleep phenomenon. Multiple studies have observed that individuals subjected to total sleep deprivation for extended periods spanning multiple days may feel "helplessly sleepy" up until the fifth day, upon which all observed individuals would feel what may be described as a second wind. Dictionary Entries near second wind second to none second touch second water second wind second world Second World War secours. Learn More about second wind. Second wind is a phenomenon in distance running, such as marathons or road running as well as other sports , whereby an athlete who is out of breath and too tired to continue suddenly finds the strength to press on at top performance with less exertion. If the oxygen supply is not soon restored, this may lead to accumulation of lactic acid.
The increase in the temperature of the skin can be felt at the same time as the "second wind" takes place. Documented experiences of the second wind go back at least years, when it was taken to be a commonly held fact of exercise.
A second wind phenomenon is also seen in some medical conditions, such as glycogen storage disease type V. When non-aerobic glycogen metabolism is insufficient to meet energy demands, physiologic mechanisms utilize alternative sources of energy such as fatty acids and proteins via aerobic respiration.
Second-wind phenomena in metabolic disorders such as McArdle's disease are attributed to this metabolic switch and the same or a similar phenomenon may occur in healthy individuals see symptoms of McArdle's disease. Muscular exercise as well as other cellular functions requires oxygen to produce ATP and properly function. This normal function is called aerobic metabolism and does not produce lactic acid if enough oxygen is present.
During heavy exercise such as long distance running or any demanding exercise, the body's need for oxygen to produce energy is higher than the oxygen supplied in the blood from respiration.
Anaerobic metabolism to some degree then takes place in the muscle and this less ideal energy production produces lactic acid as a waste metabolite. If the oxygen supply is not soon restored, this may lead to accumulation of lactic acid. This can be avoided by going to bed earlier in the evening, before the 'second wind' has time to kick in Multiple studies have observed that individuals subjected to total sleep deprivation for extended periods spanning multiple days may feel "helplessly sleepy" up until the fifth day, upon which all observed individuals would feel what may be described as a second wind.
There are multiple possible ways by which one may experience a second wind depending on the time of day.
A second wind at around 6—8 AM may be explained by cortisol , a light-triggered hormone, peaking at that time. Adrenaline as a result of anxiety or stress may also be a culprit. Care should be taken as to avoid administering hypnotic medications too early as the medication may reach peak action during the wake maintenance zone. Not only could this negate the effectiveness of the sleep-aid, it may also cause users of the drug to experience disinhibition , hallucinations, or other dissociative phenomenon if they remain awake.
From Wikipedia, the free encyclopedia. This article is about the sleep phenomenon.
For other uses, see Second Wind disambiguation. Kryger; Richard Ferber; David Gozal