Stress is a natural and needed part of life. Our caveman ancestors relied on the stress response for survival. If they encountered a tiger, their body would perceive stress and respond with a release of the correct hormones to enable escape. Stress can come in the form of exercise and can even be internally generated by thoughts of the mind. Acute stress is needed, but problems arise when we are in a chronically stressed state. Stress could be hindering your fat loss and even your muscle gain.