Stress can be caused by stressors in the environment and manifests physically, mentally, and emotionally. There are four main types of stress: general stress, cumulative stress, acute traumatic stress, and post-traumatic stress. The body's stress response is known as the general adaptation syndrome, which has three stages: alarm reaction, resistance and adaptation, and exhaustion. Effective stress management techniques include exercise, relaxation, meditation, yoga, spending time with friends/family, adopting a healthy lifestyle, and setting achievable goals. Physical symptoms of stress are both short-term like increased heart rate and sweating and long-term like insomnia and illness. Behavioral indicators can negatively impact work performance.