at sea level

at sea level

at the level of the surface of the ocean. It is easier to breathe at sea level than in the mountains. Boats on the ocean are at sea level, but those on rivers are not.
See also: level, sea
References in classic literature ?
Where the road dipped nearly at sea level to cross a small gulch Billy looked for water.
While Abu Dhabi is susceptible to flooding, it is no more vulnerable than other cities around the world located at sea level, such as New York, Holland said.
In a person at sea level, the arterial oxygen partial pressure is 90-95 mmHg; oxygen saturation is 97%.
This is more critical for people who live at sea level.
If you take any other sports - like golf - and when you're used to playing at altitude, and then have to go compete at a world-class level at sea level, it's going to be hard.
A ball that's out (of bounds) at elevation is in at sea level.
Whether at sea level, where most people live, or at Everest's peak, Earth's air contains 21 percent oxygen.
At sea level, where air weighs down heavily, living things inhale oxygen-rich air.
Climbers can perform 1/5 the amount of work they do at sea level.
5 Hypoxic training is not as fast as training at sea level.
Certainly, the racing will be faster at sea level for events over 1,500m.
Living high and training low markedly increases the performance at sea level.
Even at just 12,000 feet, he notes, blood-oxygen concentrations dip so low that, if they showed up in a person at sea level, "your HMO or Medicare insurance would pay for you to have supplemental oxygen.
These are people who lived at sea level but then moved to locations 10,000 feet or higher at least a year before the testing.
Typically, a person living at sea level who vacations in the mountains for a few weeks breathes harder and harder over a period of 8 days and then maintains the heaviest breathing until returning home.