Know the numbers. In order to lose one pound, you will need to burn 3,500 more calories than you consume in a day. How many calories you burn in a given day just by existing will depend on your current weight and level of physical activity. You can calculate this by multiplying your weight by ten.
Oxygen is crucial to sustaining life. Though it varies from person to person, on an average, 3 minutes is the maximum time where the person can stay alive without oxygen. Yoga and meditation experts may hold breath for longer than this, but these are very rare examples. In an absence of oxygen, brain cells begin to die and this effect is irreversible!
However, if a person is very sick, or in a vegetative state from a stroke or severe brain injury, that person can only survive approximately 10-14 days without food. How long can you live without water? The usual survival time without water is 3 days, but there have been occasional occurrences of people surviving 8-10 days without water. How long can you live without breathing? Usually a person can only survive 3 minutes without breathing, although there are women divers In Japan and other countries who dive for abalone or pearls who are able to survive for 5 minutes at a time, even diving to a depth of 100 feet, on a single breath, though this requires years of training.