1. The Rule of Threes
The Rule of Threes states that the human body can survive for:
3 minutes without oxygen
3 days without water
3 weeks without food
However… other factors can prolong or shorten these times.

2. Factors that can prolong. Factors that can shorten.
Air
Factors that can prolong.
Age
children and Mammalian Response
Environment
Temperature- colder is better
Altitude- lower is better
Factors that can shorten.
Age
Lack of oxygen transfer as age increases due to environmental and lifestyle choices.
Environment
Temperature- warmer is worse
Altitude- less oxygen at higher altitudes

3. Factors that can prolong. Factors that can shorten.
Water
Factors that can prolong.
Activity Level
Lower activity level uses less water
Environment
Temperature- colder is better
Food intake
Some foods contain higher amounts of water
Factors that can shorten.
Activity Level
Increased activity leads to higher level of cellular respiration resulting in increased water loss. as well as perspiration.
Environment
Temperature- warmer is worse = increased perspiration.
Age and Gender
Women have less water
Children have a greater surface area to volume ratio.

4. Factors that can prolong. Factors that can shorten.
Food
Factors that can prolong.
Initial body state
people with a higher BMI have more stored energy
Metabolic rate
Adults lower
Women lower
Differences among individuals
Environment
Temperature-Average temperatures better.
Factors that can shorten.
Initial body state
people with a lower BMI have less stored energy
Metabolic rate
Children higher
Men higher
Differences among individuals
Environment
Extremes are worse.

5. In General
Any number of very specific health disorders could lead to severe impacts on the Rule of Threes.