Survival skills
A human being can survive an average of three to five days without the intake of water. The issues presented by the need for water dictate that unnecessary water loss by perspiration be avoided in survival situations. The need for water increases with exercise.
Inhumans
Even without using the Terrigen Mist, the Kree modifications, combined with centuries of selective breeding, have given all Inhumans certain advantages. Their average lifespan is 150 years and an Inhuman in good physical condition possesses strength, reaction time, speed, and endurance greater than the finest of human athletes. Karnak and other normal Inhumans who are in excellent physical shape can lift one ton and are physically slightly superior to the peak of normal human physical achievement. Exposure to the Terrigen Mist can both enhance and in some cases reduce these physical capabilities. Most Inhumans are used to living in a pollution-free, germ-free environment and have difficulty tolerating Earth's current level of air and water pollution for any length of time.